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Results 1 - 24 of 24

X-Ray Properties of Optically Variable Low-mass AGN Candidates
- Virtual Journal - Volume 21, Issue 31 - article #45
- Alexander Messick, Vivienne Baldassare, Marla Geha, Jenny Greene
- The Astrophysical Journal
- https://doi.org/10.3847/1538-4357/acdc90
Timing the r-Process Enrichment of the Ultra-Faint Dwarf Galaxy Reticulum II. (arXiv:2212.00810v1 [astro-ph.GA])
- Virtual Journal - Volume 20, Issue 48 - article #6
- Joshua D. Simon, Thomas M. Brown, Burçin Mutlu-Pakdil, Alexander P. Ji, Alex Drlica-Wagner, Roberto J. Avila, Clara E. Martínez-Vázquez, Ting S. Li, Eduardo Balbinot, Keith Bechtol, Anna Frebel, Marla Geha, Terese T. Hansen, David J. James, Andrew B. Pace, M. Aguena, O. Alves, F. Andrade-Oliveira, J. Annis, D. Bacon, E. Bertin, D. Brooks, D. L. Burke, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, M. Costanzi, L. N. da Costa, J. De Vicente, S. Desai, P. Doel, S. Everett, I. Ferrero, J. Frieman, J. García-Bellido, M. Gatti, D. W. Gerdes, D. Gruen, R. A. Gruendl, J. Gschwend, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, K. Kuehn, N. Kuropatkin, J. L. Marshall, J. Mena-Fernández, R. Miquel, A. Palmese, F. Paz-Chinchón, M. E. S. Pereira, A. Pieres, et al. (15 additional authors not shown)
- http://arxiv.org/abs/2212.00810
Multiple Chemodynamic Stellar Populations of the Ursa Minor Dwarf Spheroidal Galaxy. (arXiv:2002.09503v2 [astro-ph.GA] UPDATED)
- Virtual Journal - Volume 18, Issue 21 - article #6
- Andrew B. Pace (CMU), Manoj Kaplinghat (UCI), Evan Kirby (Caltech), Joshua D. Simon (Carnegie Obs), Erik Tollerud (STSci), Ricardo R. Muñoz (U. Chile), Patrick Côté, (NRC), S. G. Djorgovski (Caltech), Marla Geha (Yale)
- http://arxiv.org/abs/2002.09503
Pristine Dwarf-Galaxy Survey I: A detailed photometric and spectroscopic study of the very metal-poor Draco II satellite. (arXiv:1807.10655v1 [astro-ph.GA])
- Virtual Journal - Volume 16, Issue 31 - article #8
- Nicolas Longeard, Nicolas Martin, Else Starkenburg, Rodrigo A. Ibata, Michelle L. M. Collins, Marla Geha, Benjamin P. M. Laevens, R. Michael Rich, David S. Aguado, Anke Arentsen, Raymond G. Carlberg, Patrick Côté, Vanessa Hill, Pascale Jablonka, Jonay I. González Hernández, Julio F. Navarro, Rubén Sánchez-Janssen, Eline Tolstoy, Kim A. Venn, Kris Youakim
- http://arxiv.org/abs/1807.10655
A MegaCam Survey of Outer Halo Satellites. VI: The Spatially Resolved Star Formation History of the Carina Dwarf Spheroidal Galaxy. (arXiv:1607.05312v1 [astro-ph.GA])
- Virtual Journal - Volume 14, Issue 30 - article #2
- Felipe A. Santana, Ricardo R. Muñoz, T. J. L. de Boer, Joshua D. Simon, Marla Geha, Patrick Côté, Andrés E. Guzmán, Peter Stetson, S. G. Djorgovski
- http://arxiv.org/abs/1607.05312
High-resolution Spectroscopy of Extremely Metal-poor Stars in the Least-evolved Galaxies: Bootes II
- Virtual Journal - Volume 14, Issue 6 - article #30
- Alexander P. Ji, Anna Frebel, Joshua D. Simon, and Marla Geha
- The Astrophysical Journal - Volume: 817, Issue: 1
- View article PDF (1.70 MB)
High-resolution spectroscopy of extremely metal-poor stars in the least evolved galaxies: Bootes II
- Virtual Journal - Volume 13, Issue 40 - article #10
- Alexander P. Ji, Anna Frebel, Joshua D. Simon, Marla Geha
- arXiv.org - Astrophysics - Volume: 2015, Issue: 30 Oct
- arXiv:1510.07632 [pdf, other]
A Megacam Survey of Outer Halo Satellites. IV. Two foreground populations possibly associated with the Monoceros substructure in the direction of NGC2419 and Koposov2
- Virtual Journal - Volume 13, Issue 13 - article #1
- Julio A. Carballo-Bello, Ricardo R. Munoz, Jeffrey L. Carlin, Patrick Cote, Marla Geha, Joshua D. Simon, S. G. Djorgovski
- arXiv.org - Astrophysics - Volume: 2015, Issue: 3 Apr
- arXiv:1504.00021 [pdf, other]
[α/Fe] Abundances of Four Outer M31 Halo Stars
- Virtual Journal - Volume 12, Issue 24 - article #112
- Luis C. Vargas, Karoline M. Gilbert, Marla Geha, Erik J. Tollerud, Evan N. Kirby, and Puragra Guhathakurta
- The Astrophysical Journal Letters - Volume: 797, Issue: 1
- View article PDF (554 KB)
The Formation History of the Ultra-Faint Dwarf Galaxies
- Virtual Journal - Volume 11, Issue 40 - article #13
- Thomas M. Brown, Jason Tumlinson, Marla Geha, Evan Kirby, Don A. VandenBerg, Jason S. Kalirai, Joshua D. Simon, Roberto J. Avila, Ricardo R. Munoz, Puragra Guhathakurta, Alvio Renzini, Henry C. Ferguson, Luis C. Vargas, Mario Gennaro
- arXiv.org - Astrophysics - Volume: 2013, Issue: 4 Oct
- arXiv:1310.0824 [pdf, ps, other]
The Stellar Initial Mass Function of Ultra-faint Dwarf Galaxies: Evidence for IMF Variations with Galactic Environment
- Virtual Journal - Volume 11, Issue 26 - article #54
- Marla Geha, Thomas M. Brown, Jason Tumlinson, Jason S. Kalirai, Joshua D. Simon, Evan N. Kirby, Don A. VandenBerg, Ricardo R. MuÃ±oz, Roberto J. Avila, Puragra Guhathakurta, and Henry C. Ferguson
- The Astrophysical Journal - Volume: 771, Issue: 1
- Abstract References Full text PDF (588 KB) Enhanced article HTML
Segue 2: The Least Massive Galaxy
- Virtual Journal - Volume 11, Issue 23 - article #40
- Evan N. Kirby, Michael Boylan-Kolchin, Judith G. Cohen, Marla Geha, James S. Bullock, and Manoj Kaplinghat
- The Astrophysical Journal - Volume: 770, Issue: 1
- Abstract References Full text PDF (1.01 MB) Enhanced article HTML
Segue 2: The Least Massive Galaxy
- Virtual Journal - Volume 11, Issue 17 - article #8
- Evan N. Kirby (1), Michael Boylan-Kolchin (1), Judith G. Cohen (2), Marla Geha (3), James S. Bullock (1), Manoj Kaplinghat (1) ((1) UC Irvine, (2) Caltech, (3) Yale)
- arXiv.org - Astrophysics - Volume: 2013, Issue: 26 Apr
- arXiv:1304.6080 [pdf, ps, other]
The Distribution of Alpha Elements in Ultra-faint Dwarf Galaxies
- Virtual Journal - Volume 11, Issue 14 - article #35
- Luis C. Vargas, Marla Geha, Evan N. Kirby, and Joshua D. Simon
- The Astrophysical Journal - Volume: 767, Issue: 2
- Abstract References Full text PDF (860 KB) Enhanced article HTML
The Primeval Populations of the Ultra-faint Dwarf Galaxies
- Virtual Journal - Volume 10, Issue 27 - article #74
- Thomas M. Brown, Jason Tumlinson, Marla Geha, Evan N. Kirby, Don A. VandenBerg, Ricardo R. MuÃ±oz, Jason S. Kalirai, Joshua D. Simon, Roberto J. Avila, Puragra Guhathakurta, Alvio Renzini, and Henry C. Ferguson
- The Astrophysical Journal Letters - Volume: 753, Issue: 1
- Abstract References Full text PDF (598 KB) View as HTML
The Primeval Populations of the Ultra-Faint Dwarf Galaxies
- Virtual Journal - Volume 10, Issue 23 - article #10
- Thomas M. Brown, Jason Tumlinson (STScI), Marla Geha (Yale), Evan N. Kirby (CalTech), Don A. VandenBerg (U. of Victoria), Ricardo R. Munoz (U. de Chile), Jason S. Kalirai (STScI), Joshua D. Simon (Carnegie), Roberto J. Avila (STScI), Puragra Guhathakurta (UCO/Lick), Alvio Renzini (INAF), Henry C. Ferguson (STScI)
- arXiv.org - Astrophysics - Volume: 2012, Issue: 8 Jun
- arXiv:1206.0941 [pdf, ps, other]
Segue 3: An Old, Extremely Low Luminosity Star Cluster in the Milky Way's Halo
- Virtual Journal - Volume 9, Issue 37 - article #31
- Ross Fadely, Beth Willman, Marla Geha, Shane Walsh, Ricardo R. MuÃ±oz, Helmut Jerjen, Luis C. Vargas and Gary S. Da Costa
- Astronomical Journal - Volume: 142, Issue: 3
- doi:10.1088/0004-6256/142/3/88 Tag this article
A Complete Spectroscopic Survey of the Milky Way Satellite Segue 1: Dark Matter Content, Stellar Membership, and Binary Properties from a Bayesian Analysis
- Virtual Journal - Volume 9, Issue 37 - article #38
- Gregory D. Martinez, Quinn E. Minor, James Bullock, Manoj Kaplinghat, Joshua D. Simon and Marla Geha
- The Astrophysical Journal - Volume: 738, Issue: 1
- Abstract References Full text PDF (902 KB) View as HTML
A Complete Spectroscopic Survey of the Milky Way Satellite Segue 1: The Darkest Galaxy
- Virtual Journal - Volume 9, Issue 18 - article #49
- Joshua D. Simon, Marla Geha, Quinn E. Minor, Gregory D. Martinez, Evan N. Kirby, James S. Bullock, Manoj Kaplinghat, Louis E. Strigari, Beth Willman, Philip I. Choi, Erik J. Tollerud and Joe Wolf
- The Astrophysical Journal - Volume: 733, Issue: 1
- Abstract References Full text PDF (1.24 MB) HTML with Enhancements
A Complete Spectroscopic Survey of the Milky Way satellite Segue 1: Dark matter content, stellar membership and binary properties from a Bayesian analysis
- Virtual Journal - Volume 8, Issue 36 - article #2
- Gregory D. Martinez, Quinn E. Minor, James Bullock, Manoj Kaplinghat, Joshua D. Simon, Marla Geha
- arXiv.org - Astrophysics - Volume: 2010, Issue: 3 Sep
- arXiv:1008.4585 [pdf, ps, other]
A Complete Spectroscopic Survey of the Milky Way Satellite Segue 1: The Darkest Galaxy
- Virtual Journal - Volume 8, Issue 32 - article #1
- Joshua D. Simon (Carnegie Observatories), Marla Geha (Yale), Quinn E. Minor, Gregory D. Martinez (UC Irvine), Evan N. Kirby (Caltech), James S. Bullock, Manoj Kaplinghat (UC Irvine), Louis E. Strigari (Stanford), Beth Willman (Haverford), Philip I. Choi (Pomona), Erik J. Tollerud, Joe Wolf (UC Irvine)
- arXiv.org - Astrophysics - Volume: 2010, Issue: 30 Jul
- arXiv:1007.4198 [pdf, ps, other]
High-Resolution Spectroscopy of Extremely Metal-Poor Stars in the Least Evolved Galaxies: Ursa Major II and Coma Berenices
- Virtual Journal - Volume 7, Issue 51 - article #29
- <em >Anna Frebel, Joshua D. Simon, Marla Geha, and Beth Willman</em&gt,
- The Astrophysical Journal - Volume: 708, Issue: 1
- Abstract | References
The SPLASH Survey: A Spectroscopic Analysis of the Metal-Poor, Low-Luminosity M31 dSph Satellite Andromeda X
- Virtual Journal - Volume 7, Issue 43 - article #37
- Jason S. Kalirai, Daniel B. Zucker, Puragra Guhathakurta, Marla Geha, Alexei Y. Kniazev, David Martínez-Delgado, Eric F. Bell, Eva K. Grebel, and Karoline M. Gilbert
- The Astrophysical Journal - Volume: 705, Issue: 1
- Abstract | References
Uncovering Extremely Metal-Poor Stars in the Milky Way's Ultra-Faint Dwarf Spheroidal Satellite Galaxies
- Virtual Journal - Volume 6, Issue 29 - article #6
- Evan N. Kirby (1), Joshua D. Simon (2), Marla Geha (3), Puragra Guhathakurta (1), Anna Frebel (4) ((1) University of California Santa Cruz/Lick Observatory, (2) California Institute of Technology, (3) Yale University, (4) University of Texas Austin/McDonald Observatory)
- arXiv.org - Astrophysics - Volume: 2008, Issue: 17 Jul
- arXiv:0807.1925 [ps, pdf, other]

Results 1 - 24 of 24

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