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Difference in Chemical Composition between the Bright and Faint Red Clump Stars in the Milky Way Bulge
- Volume 16, Issue 5 - article #8
- Dongwook Lim, Young-Wook Lee, Andreas Koch, Seungsoo Hong, Christian I. Johnson, Jaeyeon Kim, Chul Chung, Mario Mateo,, John I. Bailey III
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/907/1/47
Mono-enriched stars and Galactic chemical evolution -- Possible biases in observations and theory. (arXiv:2009.11876v1 [astro-ph.SR])
- Volume 15, Issue 40 - article #10
- Camilla Juul Hansen, Andreas Koch, Lyudmila Mashonkina, Mattis Magg, Maria Bergemann, Tatyana Sitnova, Andrew J. Gallagher, Ilya Ilyin, Elisabetta Caffau, Huawei W. Zhang, Klauss G. Strassmeier, Ralf S. Klessen
- http://arxiv.org/abs/2009.11876
Blanco DECam Bulge Survey (BDBS) II: Project Performance, Data Analysis, and Early Science Results. (arXiv:2008.09257v1 [astro-ph.GA])
- Volume 15, Issue 35 - article #1
- Christian I. Johnson, R. Michael Rich, Michael D. Young, Iulia T. Simion, William I. Clarkson, Catherine A. Pilachowski, Scott Michael, Andrea Kunder, Andreas Koch, A. Katherina Vivas
- http://arxiv.org/abs/2008.09257
The Blanco DECam Bulge Survey. I. The Survey Description and Early Results. (arXiv:2008.09255v1 [astro-ph.GA])
- Volume 15, Issue 35 - article #7
- R. Michael Rich, Christian I. Johnson, Michael Young, Iulia Simion, William Clarkson, Catherine Pilachowski, Scott Michael, Andrea Kunder, A Katherine Vivas, Andreas Koch, Tommaso Marchett, Rodrigo Ibata, Nicolas Martin, Annie C. Robin, Nadege Lagard, Michelle Collins, Zeljko Ivezic, Roberto de Propris, Juntai Shen
- http://arxiv.org/abs/2008.09255
The age of the Milky Way inner stellar spheroid from RR Lyrae population synthesis. (arXiv:2006.12507v1 [astro-ph.GA])
- Volume 15, Issue 26 - article #6
- A. Savino, A. Koch, Z. Prudil, A. Kunder, R. Smolec
- http://arxiv.org/abs/2006.12507
The Bulge Radial Velocity Assay for RR Lyrae Stars (BRAVA-RR) DR2: A Bimodal Bulge?
- Volume 15, Issue 21 - article #5
- Andrea Kunder, Angeles PÃ©rez-Villegas, R. Michael Rich, Jonathan Ogata, Emma Murari, Emilie Boren, Christian I. Johnson, David Nataf, Alistair Walker, Giuseppe Bono, Andreas Koch, Roberto De Propris, Jesper Storm,, Jennifer Wojno
- The Astronomical Journal
- http://iopscience.iop.org/1538-3881/159/6/270
The Bulge Radial Velocity Assay for RR Lyrae stars (BRAVA-RR) DR2: a Bimodal Bulge?. (arXiv:2004.11382v1 [astro-ph.SR])
- Volume 15, Issue 18 - article #5
- Andrea Kunder, Angeles Perez-Villegas, R. Michael Rich, Jonathan Ogata, Emma Murari, Emilie Boren, Christian I. Johnson, David Nataf, Alistair Walker, Giuseppe Bono, Andreas Koch, Roberto De Propris, Jesper Storm, Jennifer Wojno
- http://arxiv.org/abs/2004.11382
Identification of strontium in the merger of two neutron stars. (arXiv:1910.10510v1 [astro-ph.HE])
- Volume 14, Issue 43 - article #4
- Darach Watson (1, 2), Camilla J. Hansen (3), Jonatan Selsing (1, 2), Andreas Koch (4), Daniele B. Malesani (1, 2, 5), Anja C. Andersen (1), Johan P. U. Fynbo (1, 2), Almudena Arcones (6, 7), Andreas Bauswein (7, 8), Stefano Covino (9), Aniello Grado (10), Kasper E. Heintz (1, 2, 11), Leslie Hunt (12), Chryssa Kouveliotou (13, 14), Giorgos Leloudas (1, 5), Andrew Levan (15, 16), Paolo Mazzali (17, 18), Elena Pian (19) ((1) Niels Bohr Institute, University of Copenhagen, (2) Cosmic Dawn Center (DAWN), (3) Max-Planck-Institut für Astronomie, Heidelberg, (4) Zentrum für Astronomie der Universität Heidelberg, (5) DTU Space, Technical University of Denmark, (6) Institut für Kernphysik, Technische Universität Darmstadt, (7) GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, (8) Heidelberger Institut für Theoretische Studien, Heidelberg, (9) INAF / Brera Astronomical Observatory, Merate, (10) INAF-OACN, Naples, (11) Centre for Astrophysics, Cosmology, University of Iceland, (12) INAF - Osservatorio Astrofisico di Arcetri, Firenze, (13) Physics Department, the George Washington University, (14) Astronomy, Physics, Statistics Institute of Sciences (APSIS), Washington, DC, (15) Department of Astrophysics/IMAPP, Radboud University Nijmegen, (16) Department of Physics, University of Warwick, (17) Astrophysics Research Institute, Liverpool John Moores University, (18) Max-Planck Institute for Astrophysics, Garching, (19) INAF, Astrophysics, Space Science Observatory, Bologna)
- http://arxiv.org/abs/1910.10510
The mass fraction of halo stars contributed by the disruption of globular clusters in the E-MOSAICS simulations. (arXiv:1910.06973v1 [astro-ph.GA])
- Volume 14, Issue 42 - article #3
- Marta Reina-Campos (Heidelberg), Meghan E. Hughes (LJMU), J. M. Diederik Kruijssen (Heidelberg), Joel L. Pfeffer (LJMU), Nate Bastian (LJMU), Robert A. Crain (LJMU), Andreas Koch (Heidelberg), Eva K. Grebel (Heidelberg)
- http://arxiv.org/abs/1910.06973
Chemical composition of the outer halo globular cluster Palomar 15
- Volume 14, Issue 27 - article #3
- Andreas Koch, , R. Michael Rich
- Astronomy & Astrophysics
- http://feedproxy.google.com/~r/edp_aa/~3/9yeSFdu8BFQ/201935467
Cold, Old, and Metal-poor: New Stellar Substructures in the Milky Way’s Dwarf Spheroidals
- Volume 14, Issue 26 - article #11
- V. Lora, E. K. Grebel, S. Schmeja,, A. Koch
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/878/2/152
Purveyors of fine halos: Re-assessing globular cluster contributions to the Milky Way halo buildup with SDSS-IV
- Volume 14, Issue 20 - article #6
- Andreas Koch, Eva K. Grebel, Sarah L. Martell
- Astronomy & Astrophysics
- http://feedproxy.google.com/~r/edp_aa/~3/1GizdLWg5xc/201834825
Cold, old and metal-poor: New stellar substructures in the Milky Way's dwarf spheroidals. (arXiv:1904.10560v1 [astro-ph.GA])
- Volume 14, Issue 17 - article #1
- V. Lora, E. K. Grebel, S. Schmeja, A. Koch
- http://arxiv.org/abs/1904.10560
Purveyors of fine halos: Re-assessing globular cluster contributions to the Milky Way halo build-up with SDSS-IV. (arXiv:1904.02146v1 [astro-ph.GA])
- Volume 14, Issue 14 - article #7
- Andreas Koch, Eva K. Grebel, Sarah L. Martell
- http://arxiv.org/abs/1904.02146
Abundances and kinematics of carbon-enhanced metal-poor stars in the Galactic halo*; A new classification scheme based on Sr and Ba. (arXiv:1901.05968v1 [astro-ph.SR])
- Volume 14, Issue 4 - article #1
- Camilla J. Hansen, Terese T. Hansen, Andreas Koch, Tim C. Beers, Birgitta Nordström, Vinicius M. Placco, Johannes Andersen
- http://arxiv.org/abs/1901.05968
TOPoS V: Abundance ratios in a sample of very metal-poor turn-off stars. (arXiv:1811.00035v1 [astro-ph.SR])
- Volume 13, Issue 44 - article #4
- P. François, E. Caffau, P. Bonifacio, M. Spite, F. Spite, R. Cayrel, N. Christlieb, A.J. Gallagher, R. Klessen, A. Koch, H.-G. Ludwig, L. Monaco, B. Plez, M. Steffen, S. Zaggia
- http://arxiv.org/abs/1811.00035
Search for an Intrinsic Metallicity Spread in Old Globular Clusters of the Large Magellanic Cloud
- Volume 13, Issue 43 - article #17
- AndrÃ©s E. Piatti, Andreas Koch
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/867/1/8
Radial Velocities of RR Lyrae Stars in and around NGC 6441
- Volume 13, Issue 13 - article #10
- Andrea Kunder, Arthur Mills, Joseph Edgecomb, Mathew Thomas, Levi Schilter, Craig Boyle, Stephen Parker, Gordon Bellevue, R. Michael Rich, Andreas Koch, Christian I. Johnson,, David M. Nataf
- The Astronomical Journal
- http://iopscience.iop.org/1538-3881/155/4/171
Detailed chemical abundance analysis of the thick disk star cluster Gaia 1⋆⋆⋆
- Volume 13, Issue 4 - article #19
- Andreas Koch, Terese T. Hansen, Andrea Kunder
- Astronomy & Astrophysics
- http://feedproxy.google.com/~r/edp_aa/~3/BQ7Da1hfwpA/201731434
TOPoS: IV. Chemical abundances from high-resolution observations of seven EMP stars. (arXiv:1801.03935v1 [astro-ph.SR])
- Volume 13, Issue 3 - article #7
- P. Bonifacio, E. Caffau, M. Spite, F. Spite, L. Sbordone, L. Monaco, P. François, B. Plez, P. Molaro, A. J. Gallagher, R. Cayrel, N. Christlieb, R. S. Klessen, A. Koch, H.-G. Ludwig, M. Steffen, S. Zaggia, C. Abate
- http://arxiv.org/abs/1801.03935
Spectroscopic confirmation of the low-latitude object FSR 1716 as an old globular cluster
- Volume 12, Issue 38 - article #13
- Andreas Koch, Andrea Kunder, Jennifer Wojno
- Astronomy & Astrophysics
- http://feedproxy.google.com/~r/edp_aa/~3/n4Vn-zODffw/201731771
Detailed chemical abundance analysis of the thick disk star cluster Gaia 1. (arXiv:1709.04022v1 [astro-ph.GA])
- Volume 12, Issue 37 - article #3
- Andreas Koch, Terese T. Hansen, Andrea Kunder
- http://arxiv.org/abs/1709.04022
Abundance analysis of a CEMP-no star in the Carina dwarf spheroidal galaxy. (arXiv:1706.06599v1 [astro-ph.SR])
- Volume 12, Issue 25 - article #1
- A. Susmitha, A. Koch, T. Sivarani
- http://arxiv.org/abs/1706.06599
The binary fraction of stars in dwarf galaxies: the case of Leo II. (arXiv:1706.04184v1 [astro-ph.GA])
- Volume 12, Issue 24 - article #12
- Meghin Spencer, Mario Mateo, Matthew Walker, Edward Olszewski, Alan McConnachie, Evan Kirby, Andreas Koch
- http://arxiv.org/abs/1706.04184
The Binary Fraction of Stars in Dwarf Galaxies: The Case of Leo II
- Volume 12, Issue 21 - article #10
- Meghin E. Spencer, Mario Mateo, Matthew G. Walker, Edward W. Olszewski, Alan W. McConnachie, Evan N. Kirby,, Andreas Koch
- The Astronomical Journal
- http://iopscience.iop.org/1538-3881/153/6/254
The Gaia-ESO Survey: Galactic evolution of sulphur and zinc. (arXiv:1704.02981v1 [astro-ph.SR])
- Volume 12, Issue 15 - article #1
- S. Duffau, E. Caffau, L. Sbordone, P. Bonifacio, S. Andrievsky, S. Korotin, C. Babusiaux, S. Salvadori, L. Monaco, P. Francois, A. Skuladottir, A. Bragaglia, P. Donati, L. Spina, A. J. Gallagher, H.-G. Ludwig, N. Christlieb, C. J. Hansen, A. Mott, M. Steffen, S. Zaggia, S. Blanco-Cuaresma, F. Calura, E. Friel, F. M. Jimenez-Esteban, A. Koch, L. Magrini, E. Pancino, B. Tang, G. Tautvaisiene, A. Vallenari, K. Hawkins, G. Gilmore, S. Randich, S. Feltzing, T. Bensby, E. Flaccomio, R. Smiljanic, A. Bayo, G. Carraro, A.R. Casey, M. T. Costado, F. Damiani, E. Franciosini, A. Hourihane, P. Jofre, C. Lardo, J. Lewis, L. Morbidelli, S. G. Sousa, C. C. Worley
- http://arxiv.org/abs/1704.02981
Something borrowed, something blue: The nature of blue metal-poor stars inferred from their colours and chemical abundances. (arXiv:1611.03494v1 [astro-ph.SR])
- Volume 11, Issue 47 - article #10
- C. J. Hansen, P. Jofre, A. Koch, A McWilliam, C. S. Sneden
- http://arxiv.org/abs/1611.03494
TOPoS
- Volume 11, Issue 45 - article #20
- E. Caffau, P. Bonifacio, M. Spite, F. Spite, L. Monaco, L. Sbordone, P. FranÃ§ois, A. J. Gallagher, B. Plez, S. Zaggia, H.-G. Ludwig, R. Cayrel, A. Koch, M. Steffen, S. Salvadori, R. Klessen, S. Glover, N. Christlieb
- Astronomy & Astrophysics
- http://feedproxy.google.com/~r/edp_aa/~3/RJ0h5na7TGY/201629776
TOPoS: III. An ultra iron-poor multiple CEMP system. (arXiv:1610.04106v1 [astro-ph.GA])
- Volume 11, Issue 42 - article #7
- E. Caffau, P. Bonifacio, M. Spite, F. Spite, L. Monaco, L. Sbordone, P. Francois, A. J. Gallagher, B. Plez, S. Zaggia, H.-G. Ludwig, R. Cayrel, A. Koch, M. Steffen, S. Salvadori, R. Klessen, S. Glover, N. Christlieb
- http://arxiv.org/abs/1610.04106
Chemical abundances in a high velocity RR Lyrae star near the bulge
- Volume 11, Issue 13 - article #3
- Camilla Juul Hansen, Robert Michael Rich, Andreas Koch, Siyi Xu, Andrea Kunder, Hans-Guenter Ludwig
- arXiv.org - Astrophysics - Volume: 2016, Issue: 25 Mar
- arXiv:1603.05654 [pdf, ps, other]
Triangulum II: A Very Metal-poor and Dynamically Hot Stellar System
- Volume 11, Issue 9 - article #16
- Nicolas F. Martin, Rodrigo A. Ibata, Michelle L. M. Collins, R. Michael Rich, Eric F. Bell, Annette M. N. Ferguson, Benjamin P. M. Laevens, Hans-Walter Rix, Scott C. Chapman, and Andreas Koch
- The Astrophysical Journal - Volume: 818, Issue: 1
- View article PDF (578 KB)
Metal-poor stars towards the Galactic bulge - a population potpourri
- Volume 10, Issue 41 - article #6
- Andreas Koch, Andrew McWilliam, George W. Preston, Ian B. Thompson
- arXiv.org - Astrophysics - Volume: 2015, Issue: 6 Nov
- arXiv:1511.01490 [pdf, ps, other]
Strömgren uvby photometry of the peculiar globular cluster NGC 2419
- Volume 10, Issue 38 - article #8
- Matthias J. Frank, Andreas Koch, Sofia Feltzing, Nikolay Kacharov, Mark I. Wilkinson, Mike Irwin
- arXiv.org - Astrophysics - Volume: 2015, Issue: 16 Oct
- arXiv:1510.02482 [pdf, other]
Triangulum II: a very metal-poor and dynamically hot stellar system
- Volume 10, Issue 38 - article #11
- Nicolas F. Martin, Rodrigo A. Ibata, Michelle L. M. Collins, R. Michael Rich, Eric F. Bell, Annette M. N. Ferguson, Benjamin P. M. Laevens, Hans-Walter Rix, Scott C. Chapman, Andreas Koch
- arXiv.org - Astrophysics - Volume: 2015, Issue: 16 Oct
- arXiv:1510.04433 [pdf, ps, other]
Stellar science from a blue wavelength range
- Volume 10, Issue 33 - article #12
- C. J. Hansen, H.-G. Ludwig, W. Seifert, A. Koch, W. Xu, E. Caffau, N. Christlieb, A. J. Korn, K. Lind, L. Sbordone, G. Ruchti, S. Feltzing, R. S. de Jong, S. Barden and O. Schnurr
- Astronomische Nachrichten - Volume: 336, Issue: 7
- Abstract PDF(402K)PDF(402K)References Request Permissions
Stellar science from a blue wavelength range - A possible design for the blue arm of 4MOST
- Volume 10, Issue 29 - article #8
- C. J. Hansen, H.-G. Ludwig, W. Seifert, A. Koch, W. Xu, E. Caffau, N. Christlieb, A. J. Korn, K. Lind, L. Sbordone, G. Ruchti, S. Feltzing, R. S. de Jong, S. Barden, O. Schnurr
- arXiv.org - Astrophysics - Volume: 2015, Issue: 14 Aug
- arXiv:1508.02714 [pdf, ps, other]
A high-velocity bulge RR Lyrae variable on a halo-like orbit
- Volume 10, Issue 23 - article #2
- Andrea Kunder, R. Michael Rich, Keith Hawkins, Radek Poleski, Jesper Storm, Christian I. Johnson, Juntai Shen, Zhao-Yu Li, Maria Jose Cordero, David M. Nataf, Giuseppe Bono, Alistair R. Walker, Andreas Koch, Roberto De Propris, Andrzej Udalski, Michal K. Szymanski, Igor Soszynski, Grzegorz Pietrzynski, Krzysztof Ulaczyk, Lukasz Wyrzykowski, Pawel Pietrukowicz, Jan Skowron, Szymon Kozlowski, Przemyslaw Mroz
- arXiv.org - Astrophysics - Volume: 2015, Issue: 12 Jun
- arXiv:1506.02664 [pdf, other]
Selecting Sagittarius: Identification and Chemical Characterization of the Sagittarius Stream
- Volume 10, Issue 22 - article #8
- E. A. Hyde, S. Keller, D. B. Zucker, R. Ibata, A. Siebert, G. F. Lewis, J. Penarrubia, M. Irwin, G. Gilmore, R. R. Lane, A. Koch, A. R. Conn, F. I. Diakogiannis, S. Martell
- arXiv.org - Astrophysics - Volume: 2015, Issue: 5 Jun
- arXiv:1505.07926 [pdf, other]
Selecting Sagittarius: Identification and Chemical Characterization of the Sagittarius Stream
- Volume 10, Issue 22 - article #20
- E. A. Hyde, S. Keller, D. B. Zucker, R. Ibata, A. Siebert, G. F. Lewis, J. Penarrubia, M. Irwin, G. Gilmore, R. R. Lane, A. Koch, A. R. Conn, F. I. Diakogiannis, and S. Martell
- The Astrophysical Journal - Volume: 805, Issue: 2
- View article PDF (2.41 MB)
TOPoS: II. On the bimodality of carbon abundance in CEMP stars. Implications on the early chemical evolution of galaxies
- Volume 10, Issue 16 - article #19
- P. Bonifacio (1), E. Caffau (1,2), M. Spite (2), M. Limongi (3,4), A. Chieffi (5), R.S. Klessen (6,7,8), P. François (1,9), P. Molaro (10), H. G. Ludwig (2,1), S. Zaggia (11), F. Spite (1), B. Plez (12), R. Cayrel (1), N. Christlieb (2), P.C. Clark (13,6), S.C.O. Glover (6), F. Hammer (1), A. Koch (2), L. Monaco (14,15), L. Sbordone (16,17), M. Steffen (18,1) ((1) GEPI, Observatoire de Paris, (2) ZAH-LSW, (3) INAF - OA Roma, (4) Kavli IPMU, Univ. Tokyo (5) INAF - IASFC, (6) ZAH-ARI, (7) Kavli, IPAC, Stanford Univ., (8) Dep A&A Univ, Calfornia, (9) UPJV, Univ. Picardie, (10) INAF - OA Trieste, (11) INAF- OA Padova, (12) LUPM, Univ. Montpellier, (13) School of Physics and Astronomy, Cardiff Univ. (14) ESO, (15) DCF - Univ. A. Bello, (16) MAS, (17) PUC - Chile, (18) Leibniz-Institut AIP)
- arXiv.org - Astrophysics - Volume: 2015, Issue: 24 Apr
- arXiv:1504.05963 [pdf, ps, other]
The Gaia-ESO Survey: Detailed Abundances in the Metal-poor Globular Cluster NGC 4372
- Volume 10, Issue 15 - article #15
- I. San Roman, C. Muñoz, D. Geisler, S. Villanova, N. Kacharov, A. Koch, G. Carraro, G. Tautvaišiene, A. Vallenari, E. J. Alfaro, T. Bensby, E. Flaccomio, P. Francois, A. J. Korn, E. Pancino, A. Recio-Blanco, R. Smiljanic, M. Bergemann, M. T. Costado, F. Damiani, U. Heiter, A. Hourihane, P. Jofré, C. Lardo, P. de Laverny, T. Masseron, L. Morbidelli, L. Sbordone, S. G. Sousa, C. C. Worley, S. Zaggia
- arXiv.org - Astrophysics - Volume: 2015, Issue: 17 Apr
- arXiv:1504.03497 [pdf, ps, other]
An inefficient dwarf: chemical abundances and the evolution of the Ursa Minor dwarf spheroidal galaxy
- Volume 10, Issue 12 - article #9
- UÄur Ural, Gabriele Cescutti, Andreas Koch, Jan Kleyna, Sofia Feltzing, and Mark I. Wilkinson
- Monthly Notices of the Royal Astronomical Society - Volume: 449, Issue: 1
- Abstract Full Text (HTML) Full Text (PDF) SUPPORTING INFORMATION
The Galactic evolution of sulphur as traced by globular clusters
- Volume 10, Issue 10 - article #12
- Nikolay Kacharov, Andreas Koch, Elisabetta Caffau, Luca Sbordone
- arXiv.org - Astrophysics - Volume: 2015, Issue: 13 Mar
- arXiv:1503.02691 [pdf, ps, other]
A Chemical Confirmation of the Faint Boötes II Dwarf Spheroidal Galaxy
- Volume 9, Issue 23 - article #62
- Andreas Koch and R. Michael Rich
- The Astrophysical Journal - Volume: 794, Issue: 1
- View article PDF (407 KB)
Light, Alpha, and Fe-peak Element Abundances in the Galactic Bulge
- Volume 9, Issue 22 - article #48
- Christian I. Johnson, R. Michael Rich, Chiaki Kobayashi, Andrea Kunder, and Andreas Koch
- Astronomical Journal - Volume: 148, Issue: 4
- View article PDF (3.76 MB)
A study of rotating globular clusters - The case of the old, metal-poor globular cluster NGC 4372
- Volume 9, Issue 22 - article #51
- N. Kacharov, P. Bianchini, A. Koch, M. J. Frank, N. F. Martin, G. van de Ven, T. H. Puzia, I. McDonald, C. I. Johnson and A. A. Zijlstra
- Astronomy and Astrophysics - Volume: 567, Issue: July 2014
- http://dx.doi.org/10.1051/0004-6361/201423709
  Abstract Full HTML PDF (2.224 MB) ePUB (1.918 MB) References Tables at CDS NASA ADS Abstract Service
A chemical confirmation of the faint Bootes II dwarf Spheroidal Galaxy
- Volume 9, Issue 21 - article #19
- Andreas Koch, R. Michael Rich
- arXiv.org - Astrophysics - Volume: 2014, Issue: 22 Aug
- arXiv:1408.3628 [pdf, ps, other]
The chemical composition of a regular halo globular cluster: NGC 5897
- Volume 9, Issue 21 - article #38
- Andreas Koch and Andrew McWilliam
- Astronomy and Astrophysics - Volume: 565, Issue: May 2014
- http://dx.doi.org/10.1051/0004-6361/201323119
  Abstract Full HTML PDF (954.8 KB) ePUB (1.712 MB) References Online Material Tables at CDS NASA ADS Abstract Service
Light, Alpha, and Fe-Peak Element Abundances in the Galactic Bulge
- Volume 9, Issue 20 - article #7
- Christian I. Johnson, R. Michael Rich, Chiaki Kobayashi, Andrea Kunder, Andreas Koch
- arXiv.org - Astrophysics - Volume: 2014, Issue: 11 Jul
- arXiv:1407.2282 [pdf, ps, other]
A study of rotating globular clusters - the case of the old, metal-poor globular cluster NGC 4372
- Volume 9, Issue 20 - article #17
- N. Kacharov, P. Bianchini, A. Koch, M. J. Frank, N. F. Martin, G. van de Ven, T. H. Puzia, I. McDonald, C. I. Johnson, A. A. Zijlstra
- arXiv.org - Astrophysics - Volume: 2014, Issue: 13 Jun
- arXiv:1406.1552 [pdf, ps, other]
The Metal-poor Knee in the Fornax Dwarf Spheroidal Galaxy
- Volume 9, Issue 17 - article #33
- Benjamin Hendricks, Andreas Koch, Gustavo A. Lanfranchi, Corrado Boeche, Matthew Walker, Christian I. Johnson, Jorge PeÃ±arrubia, and Gerard Gilmore
- The Astrophysical Journal - Volume: 785, Issue: 2
- View article PDF (1.10 MB)
The Be-test in the Li-rich star #1657 of NGC 6397: evidence for Li-flash in RGB stars?
- Volume 9, Issue 16 - article #20
- L. Pasquini, A. Koch, R. Smiljanic, P. Bonifacio and A. Modigliani
- Astronomy and Astrophysics - Volume: 563, Issue: March 2014
- http://dx.doi.org/10.1051/0004-6361/201323220
  Abstract Full HTML PDF (143.8 KB) References NASA ADS Abstract Service
The chemical composition of a regular halo globular cluster: NGC 5897
- Volume 9, Issue 10 - article #6
- Andreas Koch, Andrew McWilliam
- arXiv.org - Astrophysics - Volume: 2014, Issue: 7 Mar
- arXiv:1403.1262 [pdf, ps, other]
The metal-poor Knee in the Fornax Dwarf Spheroidal Galaxy
- Volume 9, Issue 9 - article #4
- Benjamin Hendricks, Andreas Koch, Gustavo A. Lanfranchi, Corrado Boeche, Matthew Walker, Christian I. Johnson, Jorge Penarrubia, Gerard Gilmore
- arXiv.org - Astrophysics - Volume: 2014, Issue: 28 Feb
- arXiv:1402.6328 [pdf, ps, other]
The Be-test in the Li-rich star #1657 of NGC 6397: evidence for Li-flash in RGB stars?
- Volume 9, Issue 5 - article #10
- L. Pasquini, A. Koch, R. Smiljanic, P. Bonifacio, A. Modigliani
- arXiv.org - Astrophysics - Volume: 2014, Issue: 31 Jan
- arXiv:1401.7945 [pdf, ps, other]
A Spectroscopic Binary in the Hercules Dwarf Spheroidal Galaxy
- Volume 9, Issue 2 - article #15
- Andreas Koch, Terese Hansen, Sofia Feltzing, and Mark I. Wilkinson
- The Astrophysical Journal - Volume: 780, Issue: 1
- View article PDF (397 KB)
TOPoS - I. Survey design and analysis of the first sample
- Volume 8, Issue 51 - article #15
- E. Caffau, P. Bonifacio, L. Sbordone, P. FranÃ§ois, L. Monaco, M. Spite, B. Plez, R. Cayrel, N. Christlieb, P. Clark, et al. (7 more) S. Glover, R. Klessen, A. Koch, H.-G. Ludwig, F. Spite, M. Steffen and S. Zaggia
- Astronomy and Astrophysics - Volume: 560, Issue: December 2013
- http://dx.doi.org/10.1051/0004-6361/201322488
  Abstract Full HTML PDF (308.7 KB) References NASA ADS Abstract Service
A spectroscopic binary in the Hercules dwarf spheroidal galaxy
- Volume 8, Issue 46 - article #1
- Andreas Koch, Terese Hansen, Sofia Feltzing, Mark I. Wilkinson
- arXiv.org - Astrophysics - Volume: 2013, Issue: 15 Nov
- arXiv:1311.2582 [pdf, ps, other]
The masses of Local Group dwarf spheroidal galaxies: Not too small after all?
- Volume 8, Issue 37 - article #13
- Michelle L. M. Collins, Scott C. Chapman, R. M. Rich, Rodrigo A. Ibata, Nicolas F. Martin, Michael J. Irwin, Nicholas F. Bate, Geraint F. Lewis, Jorge Peñarrubia, Nobuo Arimoto, Caitlin M. Casey, Annette M. N. Ferguson, Andreas Koch, Alan W. McConnachie, Nial Tanvir
- arXiv.org - Astrophysics - Volume: 2013, Issue: 13 Sep
- arXiv:1309.3053 [pdf, other]
A comprehensive chemical abundance study of the outer halo globular cluster M 75
- Volume 8, Issue 26 - article #7
- N. Kacharov, A. Koch and A. McWilliam
- Astronomy and Astrophysics - Volume: 554, Issue: June 2013
- http://dx.doi.org/10.1051/0004-6361/201321392
  Abstract Full HTML PDF (752.1 KB) References Tables at CDS NASA ADS Abstract Service
Neutron-capture element deficiency of the Hercules dwarf spheroidal galaxy
- Volume 8, Issue 26 - article #16
- A. Koch, S. Feltzing, D. AdÃ©n and F. Matteucci
- Astronomy and Astrophysics - Volume: 554, Issue: June 2013
- http://dx.doi.org/10.1051/0004-6361/201220742
  Abstract Full HTML PDF (657.0 KB) References NASA ADS Abstract Service
A Kinematic Study of the Andromeda Dwarf Spheroidal System
- Volume 8, Issue 18 - article #17
- Michelle L. M. Collins, Scott C. Chapman, R. Michael Rich, Rodrigo A. Ibata, Nicolas F. Martin, Michael J. Irwin, Nicholas F. Bate, Geraint F. Lewis, Jorge PeÃ±arrubia, Nobuo Arimoto, Caitlin M. Casey, Annette M. N. Ferguson, Andreas Koch, Alan W. McConnachie, and Nial Tanvir
- The Astrophysical Journal - Volume: 768, Issue: 2
- Abstract References Full text PDF (4.46 MB) Enhanced article HTML
A comprehensive chemical abundance study of the outer halo globular cluster M 75
- Volume 8, Issue 16 - article #2
- Nikolay Kacharov, Andreas Koch, Andrew McWilliam
- arXiv.org - Astrophysics - Volume: 2013, Issue: 19 Apr
- arXiv:1304.4247 [pdf, ps, other]
Neutron-capture element deficiency of the Hercules dwarf spheroidal galaxy
- Volume 8, Issue 15 - article #9
- Andreas Koch, Sofia Feltzing, Daniel Aden, Francesca Matteucci
- arXiv.org - Astrophysics - Volume: 2013, Issue: 12 Apr
- arXiv:1304.2764 [pdf, ps, other]
Velocity and abundance precisions for future high-resolution spectroscopic surveys: A study for 4MOST
- Volume 8, Issue 10 - article #6
- E. Caffau, A. Koch, L. Sbordone, P. Sartoretti, C.J. Hansen, F. Royer, N. Leclerc, P. Bonifacio, N. Christlieb, H.-G. Ludwig, E.K. Grebel, R.S. de Jong, C. Chiappini, J. Walcher, S. Mignot, S. Feltzing, M. Cohen, I. Minchev, A. Helmi, T. Piffl, E. Depagne and O. Schnurr
- Astronomische Nachrichten - Volume: 334, Issue: 3
- Abstract PDF(368K)References Request Permissions
Metallicity Distribution Functions, Radial Velocities, and Alpha Element Abundances in Three Off-axis Bulge Fields
- Volume 8, Issue 10 - article #17
- Christian I. Johnson, R. Michael Rich, Chiaki Kobayashi, Andrea Kunder, Catherine A. Pilachowski, Andreas Koch, and Roberto de Propris
- The Astrophysical Journal - Volume: 765, Issue: 2
- Abstract References Full text PDF (16.11 MB) Enhanced article HTML
A kinematic study of the Andromeda dwarf spheroidal system
- Volume 8, Issue 9 - article #1
- Michelle L. M. Collins, Scott C. Chapman, R. Michael Rich, Rodrigo A. Ibata, Nicolas F. Martin, Michael J. Irwin, Nicholas F. Bate, Geraint F. Lewis, Jorge Peñarrubia, Nobuo Arimoto, Caitlin M. Casey, Annette M. N. Ferguson, Andreas Koch, Alan W. McConnachie, Nial Tanvir
- arXiv.org - Astrophysics - Volume: 2013, Issue: 1 Mar
- arXiv:1302.6590 [pdf, ps, other]
Metallicity Distribution Functions, Radial Velocities, and Alpha Element Abundances in Three Off-Axis Bulge Fields
- Volume 8, Issue 8 - article #7
- Christian I. Johnson, R. Michael Rich, Chiaki Kobayashi, Andrea Kunder, Catherine A. Pilachowski, Andreas Koch, Roberto De Propris
- arXiv.org - Astrophysics - Volume: 2013, Issue: 22 Feb
- arXiv:1302.3679 [pdf, ps, other]
Population gradients and photometric metallicities in early- and transition-type dwarf galaxies: Clues from the Sculptor group
- Volume 8, Issue 7 - article #23
- S. Lianou, E. K. Grebel, G. S. Da Costa, M. Rejkuba, H. Jerjen and A. Koch
- Astronomy and Astrophysics - Volume: 550, Issue: February 2013
- http://dx.doi.org/10.1051/0004-6361/201219959
  Abstract | Full HTML | PDF (3.907 MB) | References | Online Material | Tables at CDS | NASA ADS Abstract Service
An intermediate-band photometric study of the "Globular Cluster" NGC 2419
- Volume 8, Issue 2 - article #3
- Andreas Koch, Matthias Frank, Sofia Feltzing, Daniel Aden, Nikolay Kacharov, Mark I. Wilkinson
- arXiv.org - Astrophysics - Volume: 2013, Issue: 11 Jan
- arXiv:1301.1339 [pdf, ps, other]
Chemical element abundances in the outer halo globular cluster M 75
- Volume 8, Issue 2 - article #5
- Nikolay Kacharov, Andreas Koch
- arXiv.org - Astrophysics - Volume: 2013, Issue: 11 Jan
- arXiv:1301.2153 [pdf, ps, other]
Chemical Abundances of Metal-poor RR Lyrae Stars in the Magellanic Clouds
- Volume 7, Issue 51 - article #22
- Raoul Haschke, Eva K. Grebel, Anna Frebel, Sonia Duffau, Camilla J. Hansen, and Andreas Koch
- Astronomical Journal - Volume: 144, Issue: 3
- doi:10.1088/0004-6256/144/3/88 Tag this article
Velocity and abundance precisions for future high-resolution spectroscopic surveys: a study for 4MOST
- Volume 7, Issue 45 - article #14
- E. Caffau, A. Koch, L. Sbordone, P. Sartoretti, C. J. Hansen, F. Royer, N. Leclerc, P. Bonifacio, N. Christlieb, H. G. Ludwig, E. K. Grebel, R. S. de Jong, C. Chiappini, J. Walcher, S. Mignot, S. Feltzing, M. Cohen, I. Minchev, A. Helmi, T. Piffl, E. Depagne, O. Schnurr
- arXiv.org - Astrophysics - Volume: 2012, Issue: 9 Nov
- arXiv:1211.1406 [pdf, ps, other]
Small-scale hero: massive-star enrichment in the Hercules dwarf spheroidal
- Volume 7, Issue 25 - article #15
- Andreas Koch, Francesca Matteucci, Sofia Feltzing
- arXiv.org - Astrophysics - Volume: 2012, Issue: 22 Jun
- arXiv:1206.4302 [pdf, ps, other]
A super-Li rich turnoff star in NGC 6397 - the puzzle persists
- Volume 7, Issue 13 - article #3
- Andreas Koch, Karin Lind, Ian B. Thompson, R. Michael Rich
- arXiv.org - Astrophysics - Volume: 2012, Issue: 30 Mar
- arXiv:1203.6079 [pdf, ps, other]
Dwarf spheroidal galaxy kinematics and spiral galaxy scaling laws
- Volume 7, Issue 7 - article #24
- Paolo Salucci, Mark I. Wilkinson, Matthew G. Walker, Gerard F. Gilmore, Eva K. Grebel, Andreas Koch, Christiane Frigerio Martins and Rosemary F. G. Wyse
- Monthly Notices of the Royal Astronomical Society - Volume: 420, Issue: 3
- Abstract Full Article (HTML)PDF(242K)References Request Permissions
A First Measurement of the Proper Motion of the Leo II Dwarf Spheroidal Galaxy
- Volume 6, Issue 44 - article #25
- SÃ©bastien LÃ©pine, Andreas Koch, R. Michael Rich and Konrad Kuijken
- The Astrophysical Journal - Volume: 741, Issue: 2
- Abstract References Full text PDF (887 KB) HTML with Enhancements
A Differential Chemical Element Analysis of the Metal-poor Globular Cluster NGC 6397
- Volume 6, Issue 37 - article #18
- Andreas Koch and Andrew McWilliam
- Astronomical Journal - Volume: 142, Issue: 2
- doi:10.1088/0004-6256/142/2/63 Tag this article
Discovery of a Super-Li-rich Turnoff Star in the Metal-poor Globular Cluster NGC 6397
- Volume 6, Issue 36 - article #42
- Andreas Koch, Karin Lind and R. Michael Rich
- The Astrophysical Journal Letters - Volume: 738, Issue: 2
- Abstract References Full text PDF (258 KB) View as HTML
Sulphur in the metal poor globular cluster NGC 6397
- Volume 6, Issue 35 - article #13
- Andreas Koch, Elisabetta Caffau
- arXiv.org - Astrophysics - Volume: 2011, Issue: 2 Sep
- arXiv:1108.6054 [pdf, ps, other]
A first measurement of the Proper Motion of the Leo II dwarf spheroidal galaxy
- Volume 6, Issue 33 - article #5
- Sébastien Lépine, Andreas Koch, R. Michael Rich, Konrad Kuijken
- arXiv.org - Astrophysics - Volume: 2011, Issue: 19 Aug
- arXiv:1108.2724 [pdf, ps, other]
Discovery of a super-Li rich turn-off star in the metal poor globular cluster NGC 6397
- Volume 6, Issue 32 - article #6
- Andreas Koch, Karin Lind, R. Michael Rich
- arXiv.org - Astrophysics - Volume: 2011, Issue: 12 Aug
- arXiv:1108.2033 [pdf, ps, other]
A differential chemical element analysis of the metal poor Globular Cluster NGC 6397
- Volume 6, Issue 25 - article #1
- Andreas Koch, Andrew McWilliam
- arXiv.org - Astrophysics - Volume: 2011, Issue: 24 Jun
- arXiv:1106.4544 [pdf, ps, other]
Spectroscopic versus Photometric Metallicities: Milky Way Dwarf Spheroidal Companions as a Test Case
- Volume 6, Issue 22 - article #12
- Sophia Lianou (1), Eva K. Grebel (1), Andreas Koch (2 and 3) ((1) ARI, University of Heidelberg, (2) University of Leicester, (3) LSW, University of Heidelberg)
- arXiv.org - Astrophysics - Volume: 2011, Issue: 3 Jun
- arXiv:1105.6037 [pdf, ps, other]
The kinematic identification of a thick stellar disc in M31
- Volume 6, Issue 19 - article #25
- M. L. M. Collins, S. C. Chapman, R. A. Ibata, M. J. Irwin, R. M. Rich, A. M. N. Ferguson, G. F. Lewis, N. Tanvir and A. Koch
- Monthly Notices of the Royal Astronomical Society - Volume: 413, Issue: 3
- Abstract Full Article (HTML)PDF(2948K)References
Separating the conjoined red clump in the Galactic Bulge: Kinematics and Abundances
- Volume 6, Issue 14 - article #6
- Roberto De Propris (1), R. Michael Rich (2), Andrea Kunder (1), Christian I. Johnson (2), Andreas Koch (3) Sarah Brough (4), Christopher J. Conselice (5), Madusha Gunawardhana (6), David Palamara (7) Kevin Pimbblet (7), Dinuka Wijesinghe (6) ((1) CTIO, (2) UCLA, (3) University of Leicester, (4) Australian Astronomical Observatory, (5) University of Nottingham, (6) Sydney Institute of Astronomy, University of Sydney (7) Monash University)
- arXiv.org - Astrophysics - Volume: 2011, Issue: 8 Apr
- arXiv:1104.0223 [pdf, ps, other]
An abundance study of red-giant-branch stars in the Hercules dwarf spheroidal galaxy
- Volume 5, Issue 44 - article #2
- D. Adén, K. Eriksson, S.Feltzing, E. K. Grebel, A. Koch, M. I. Wilkinson
- arXiv.org - Astrophysics - Volume: 2010, Issue: 29 Oct
- arXiv:1010.5683 [pdf, ps, other]
The kinematic identification of a thick stellar disc in M31
- Volume 5, Issue 44 - article #17
- M. L. M. Collins, S. C. Chapman, R. A. Ibata, M. J. Irwin, R. M. Rich, A. M. N. Ferguson, G. F. Lewis, N. Tanvir, A. Koch
- arXiv.org - Astrophysics - Volume: 2010, Issue: 29 Oct
- arXiv:1010.5276 [pdf, ps, other]
Dwarf galaxies beyond our doorstep: the Centaurus A group
- Volume 5, Issue 39 - article #4
- D. Crnojević, (1), E. K. Grebel (1), A. A. Cole (2), A. Koch (3), M. Rejkuba (4), G. Da Costa (5), H. Jerjen (5) ((1) Astronomisches Rechen-Institut, Zentrum fuer Astronomie der Universitaet Heidelberg, Germany, (2) School of Mathematics & Physics, University of Tasmania, Australia, (3) Department of Physics and Astronomy, University of Leicester, UK, (4) European Southern Observatory, Garching, Germany, (5) Research School of Astronomy & Astrophysics, Institute of Advanced Studies, Australian National University, Australia)
- arXiv.org - Astrophysics - Volume: 2010, Issue: 24 Sep
- arXiv:1009.4198 [pdf, ps, other]
A Differential Chemical Abundance Scale for the Globular Cluster M5
- Volume 5, Issue 20 - article #13
- Andreas Koch and Andrew McWilliam
- Astronomical Journal - Volume: 139, Issue: 6
- Abstract References Full text PDF (546 KB) HTML with Enhancements
A Statistical Analysis of the Late-type Stellar Content in the Andromeda Halo
- Volume 5, Issue 20 - article #15
- Andreas Koch and R. Michael Rich
- Astronomical Journal - Volume: 139, Issue: 6
- Abstract References Full text PDF (2.04 MB) View as HTML
Kinematic subpopulations in dwarf spheroidal galaxies
- Volume 5, Issue 20 - article #49
- Uğur Ural, Mark I. Wilkinson, Andreas Koch, Gerard Gilmore, Timothy C. Beers, Vasily Belokurov, N. Wyn Evans, Eva K. Grebel, Simon Vidrih, Daniel B. Zucker
- Monthly Notices of the Royal Astronomical Society - Volume: 402, Issue: 2
- Abstract | References | Full Text: HTML, PDF (Size: 802K)
  Save Article
Chemical Abundances for the Outer Halo Cluster Pal 4 from Co-added High-Resolution Spectroscopy
- Volume 5, Issue 18 - article #4
- Andreas Koch, Patrick Côté,
- arXiv.org - Astrophysics - Volume: 2010, Issue: 30 Apr
- arXiv:1004.4625 [pdf, ps, other]
A statistical analysis of the late-type stellar content in the Andromeda halo
- Volume 5, Issue 15 - article #1
- Andreas Koch, R. Michael Rich
- arXiv.org - Astrophysics - Volume: 2010, Issue: 9 Apr
- arXiv:1004.0948 [pdf, ps, other]
A differential chemical abundance scale for the globular cluster M5
- Volume 5, Issue 14 - article #1
- Andreas Koch, Andrew McWilliam
- arXiv.org - Astrophysics - Volume: 2010, Issue: 2 Apr
- arXiv:1003.5010 [pdf, ps, other]
Dwarf spheroidals in the M81 Group - Metallicity distribution functions and population gradients
- Volume 5, Issue 10 - article #6
- Sophia Lianou (1), Eva K. Grebel (1), Andreas Koch (2) ((1)ARI, University of Heidelberg, (2)University of Leicester)
- arXiv.org - Astrophysics - Volume: 2010, Issue: 5 Mar
- arXiv:1003.0861 [pdf, ps, other]
A New Low Mass for the Hercules dSph: The End of a Common Mass Scale for the Dwarfs?
- Volume 4, Issue 46 - article #42
- D. Adén, M. I. Wilkinson, J. I. Read, S. Feltzing, A. Koch, G. F. Gilmore, E. K. Grebel, and I. Lundström
- The Astrophysical Journal Letters - Volume: 706, Issue: 1
- Abstract | References
All quiet in the outer halo: chemical abundances in the globular cluster Pal 3
- Volume 4, Issue 44 - article #17
- A. Koch, P. Côté, and A. McWilliam
- Astronomy and Astrophysics - Volume: 506, Issue: 2
- Abstract | PDF file (346.0 KB) | PS file (364.7 KB)
Structural Parameters of Seven Small Magellanic Cloud Intermediate-Age and Old Star Clusters
- Volume 4, Issue 42 - article #23
- <em >Katharina Glatt, Eva K. Grebel, John S. Gallagher, Antonella Nota, Elena Sabbi, Marco Sirianni, Gisella Clementini, Gary Da Costa, Monica Tosi, Daniel Harbeck, Andreas Koch, and Andrea Kayser</em&gt,
- Astronomical Journal - Volume: 138, Issue: 5
- Abstract | References
A new low mass for the Hercules dSph: the end of a common mass scale for the dwarfs?
- Volume 4, Issue 41 - article #1
- D. Adén, M. I. Wilkinson, J. I. Read, S. Feltzing, A. Koch, G. F. Gilmore, E. K. Grebel, I. Lundström
- arXiv.org - Astrophysics - Volume: 2009, Issue: 9 Oct
- arXiv:0910.1348 [ps, pdf, other]

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