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Results 1 - 84 of 84

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 Bulge Radial Velocity Assay for RR Lyrae Stars (BRAVA-RR) DR2: A Bimodal Bulge?
- Volume 15, Issue 21 - article #5
- Andrea Kunder, Angeles PÃƒÂ©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
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
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
Search for an Intrinsic Metallicity Spread in Old Globular Clusters of the Large Magellanic Cloud
- Volume 13, Issue 43 - article #17
- AndrÃƒÂ©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 1â‹†â‹†â‹†
- 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
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
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
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]
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]
An inefficient dwarf: chemical abundances and the evolution of the Ursa Minor dwarf spheroidal galaxy
- Volume 10, Issue 12 - article #9
- UÃ„ÂŸur 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 BoÃ¶tes 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 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]
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 PeÃƒÂ±arrubia, and Gerard Gilmore
- The Astrophysical Journal - Volume: 785, Issue: 2
- View article PDF (1.10 MB)
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]
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)
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 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 PeÃƒÂ±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]
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]
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 RRÂ 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
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 LeoÂ II Dwarf Spheroidal Galaxy
- Volume 6, Issue 44 - article #25
- SÃƒÂ©bastien LÃƒÂ©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 NGCÂ 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 NGCÂ 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]
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]
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]
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
All quiet in the outer halo: chemical abundances in the globular cluster Pal 3
- Volume 4, Issue 34 - article #9
- Andreas Koch, Patrick Côté, Andrew McWilliam
- arXiv.org - Astrophysics - Volume: 2009, Issue: 21 Aug
- arXiv:0908.2629 [ps, pdf, other]
Complexity in small-scale dwarf spheroidal galaxies
- Volume 4, Issue 19 - article #3
- Andreas Koch
- arXiv.org - Astrophysics - Volume: 2009, Issue: 8 May
- arXiv:0905.0557 [ps, pdf, other]
Kinematic and Chemical Constraints on the Formation of M31's Inner and Outer Halo
- Volume 3, Issue 48 - article #30
- Andreas Koch, R. Michael Rich, David B. Reitzel, Nicolas F. Martin, Rodrigo A. Ibata, Scott C. Chapman, Steven R. Majewski, Masao Mori, Yeong-Shang Loh, James C. Ostheimer, and Mikito Tanaka
- The Astrophysical Journal - Volume: 689, Issue: 2
- Abstract-Full Text-PDF Version (3860 kB)
The Bulge Radial Velocity Assay (BRAVA). I. Sample Selection and a Rotation Curve
- Volume 3, Issue 47 - article #40
- Christian D. Howard, R. Michael Rich, David B. Reitzel, Andreas Koch, Roberto De Propris, and HongSheng Zhao
- The Astrophysical Journal - Volume: 688, Issue: 2
- Abstract-Full Text-PDF Version (1366 kB)
The Extended Star Formation History of the Andromeda Spheroid at 35 kpc on the Minor Axis
- Volume 3, Issue 39 - article #36
- Thomas M. Brown, Rachael Beaton, Masashi Chiba, Henry C. Ferguson, Karoline M. Gilbert, Puragra Guhathakurta, Masanori Iye, Jasonjot S. Kalirai, Andreas Koch, Yutaka Komiyama, Steven R. Majewski, David B. Reitzel, Alvio Renzini, R. Michael Rich, Ed Smith, Allen V. Sweigart, and Mikito Tanaka
- The Astrophysical Journal Letters - Volume: 685, Issue: 2
- Abstract-Full Text-PDF Version (239 kB)
Kinematic sub-populations in dwarf spheroidal galaxies
- Volume 3, Issue 32 - article #10
- Ugur Ural (1), Mark I. Wilkinson (1), Andreas Koch (2), Gerard Gilmore (3), Timothy C. Beers (4), Vasily Belokurov (3), N. Wyn Evans (3), Eva K. Grebel (5), Simon Vidrih (5), Daniel B. Zucker (3) ((1) University of Leicester, (2) UCLA, (3) University of Cambridge, (4) Michigan State University, (5) University of Heidelberg)
- arXiv.org - Astrophysics - Volume: 2008, Issue: 7 Aug
- arXiv:0808.0141 [ps, pdf, other]
The Bulge Radial Velocity Assay (BRAVA): I. Sample Selection and a Rotation Curve
- Volume 3, Issue 31 - article #4
- Christian D. Howard, R. Michael Rich, David B. Reitzel, Andreas Koch, Roberto De Propris, HongSheng Zhao
- arXiv.org - Astrophysics - Volume: 2008, Issue: 31 Jul
- arXiv:0807.3967 [ps, pdf, other]
What is a galaxy? How Cold is Cold Dark Matter? Recent progress in Near Field Cosmology
- Volume 3, Issue 16 - article #14
- Gerard Gilmore, Dan Zucker, Mark Wilkinson, Rosemary F.G. Wyse, Vasily Belokurov, Jan Kleyna, Andreas Koch, N. Wyn Evans, Eva K. Grebel
- arXiv.org - Astrophysics - Volume: 2008, Issue: 17 Apr
- arXiv:0804.1919 [ps, pdf, other]
A New Abundance Scale for the Globular Cluster 47 Tuc
- Volume 3, Issue 13 - article #30
- <em >Andreas Koch and Andrew McWilliam</em&gt,
- Astronomical Journal - Volume: 135, Issue: 4
- Abstract | References
Complexity on Small Scales. III. Iron and α Element Abundances in the Carina Dwarf Spheroidal Galaxy
- Volume 3, Issue 13 - article #31
- <em >Andreas Koch, Eva K. Grebel, Gerard F. Gilmore, Rosemary F. G. Wyse, Jan T. Kleyna, Daniel R. Harbeck, Mark I. Wilkinson, and N. Wyn Evans</em&gt,
- Astronomical Journal - Volume: 135, Issue: 4
- Abstract | References
A new abundance scale for the globular cluster 47 Tuc
- Volume 3, Issue 8 - article #1
- Andreas Koch, Andrew McWilliam (Carnegie Observatories)
- arXiv.org - Astrophysics - Volume: 2008, Issue: 21 Feb
- arXiv:0802.2103 [ps, pdf, other]
A WIDE-FIELD VIEW OF LEO II: A STRUCTURAL ANALYSIS USING THE SLOAN DIGITAL SKY SURVEY
- Volume 2, Issue 44 - article #5
- Matthew G. Coleman, Katrin Jordi, Hans-Walter Rix, Eva K. Grebel, and Andreas Koch
- Astronomical Journal - Volume: 134, Issue: 5
- Abstract Full Text with Enhancements PDF (4542 kB) PostScript
A Wide-Field View of Leo II -- A Structural Analysis Using the SDSS
- Volume 2, Issue 33 - article #13
- Matthew G. Coleman (1), Katrin Jordi (2), Hans-Walter Rix (1), Eva K. Grebel (2), Andreas Koch (3) ((1) Max-Planck-Institut fur Astronomie, Heidelberg, Germany, (2) Astronomisches Rechen-Institut, Zentrum fur Astronomie der Universitat Heidelberg, Heidelberg, Germany, (3) Department of Physics and Astronomy, UCLA, Los Angeles, CA, USA)
- ArXiv - Astrophysics
- arXiv:0708.1853 [ps, pdf, other]
STELLAR KINEMATICS IN THE REMOTE LEO II DWARF SPHEROIDAL GALAXY—ANOTHER BRICK IN THE WALL
- Volume 2, Issue 30 - article #8
- Andreas Koch, Jan T. Kleyna, Mark I. Wilkinson, Eva K. Grebel, Gerard F. Gilmore, N. Wyn Evans, Rosemary F. G. Wyse, and Daniel R. Harbeck
- Astronomical Journal - Volume 134, Issue 2
- Abstract Full Text with Enhancements PDF (494 kB)
The Observed properties of Dark Matter on small spatial scales
- Volume 2, Issue 11 - article #13
- Gerard Gilmore, Mark I. Wilkinson, Rosemary F.G. Wyse, Jan T. Kleyna, Andreas Koch, N. Wyn Evans
- ArXiv - Astrophysics
- astro-ph/0703308 [abs, ps, pdf, other]
Stellar Kinematics and Metallicities in the Leo I Dwarf Spheroidal Galaxy—Wide-Field Implications for Galactic Evolution
- Volume 2, Issue 9 - article #1
- Andreas Koch, Mark I. Wilkinson, Jan T. Kleyna, Gerard F. Gilmore, Eva K. Grebel, A. Dougal Mackey, N. Wyn Evans, and R. F. G. Wyse
- The Astrophysical Journal - Volume657, Issue 1
- ABSTRACT, FULL TEXT WITH ENHANCEMENTS, PDF (991 kB), PS
THE ANISOTROPIC DISTRIBUTION OF M31 SATELLITE GALAXIES: A POLAR GREAT PLANE OF EARLY-TYPE COMPANIONS
- Volume 1, Issue 7 - article #27
- Andreas Koch and Eva K. Grebel
- Astronomical Journal - Volume 131, Issue 3
- Abstract Full Text with Enhancements PDF (755 kB) Page 1405

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