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Results 1 - 52 of 52

A "blue ring nebula" surrounding a thousands of years old stellar merger. (arXiv:2011.09589v1 [astro-ph.SR])
- Virtual Journal - Volume 18, Issue 47 - article #1
- Keri Hoadley, Christopher Martin, Brian D. Metzger, Mark Seibert, Andrew McWilliam, Ken J. Shen, James D. Neill, Gudmundur Stefansson, Andrew Monson, Bradley E. Schaefer
- http://arxiv.org/abs/2011.09589
A high-precision abundance analysis of the nuclear benchmark star HD 20. (arXiv:2001.11038v1 [astro-ph.SR])
- Virtual Journal - Volume 18, Issue 5 - article #2
- Michael Hanke, Camilla Juul Hansen, Hans-Günter Ludwig, Sergio Cristallo, Andrew McWilliam, Eva K. Grebel, Luciano Piersanti
- http://arxiv.org/abs/2001.11038
Evidence for Sub-Chandrasekhar Type Ia Supernovae from Stellar Abundances in Dwarf Galaxies
- Virtual Journal - Volume 17, Issue 33 - article #11
- Evan N. Kirby, Justin L. Xie, Rachel Guo, Mithi A. C. de los Reyes, Maria Bergemann, Mikhail Kovalev, Ken J. Shen, Anthony L. Piro,, Andrew McWilliam
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/881/1/45
Evidence for a Sub-Chandrasekhar-mass Type Ia Supernova in the Ursa Minor Dwarf Galaxy
- Virtual Journal - Volume 16, Issue 16 - article #21
- Andrew McWilliam, Anthony L. Piro, Carles Badenes,, Eduardo Bravo
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/857/2/97
Evidence for a Sub-Chandrasekhar Mass Type~Ia Supernova in the Ursa Minor Dwarf Galaxy. (arXiv:1710.05030v1 [astro-ph.HE])
- Virtual Journal - Volume 15, Issue 42 - article #22
- Andrew McWilliam, Anthony L. Piro, Carles Badenes, Eduardo Bravo
- http://arxiv.org/abs/1710.05030
High-resolution Spectroscopic Abundances of Red Giant Branch Stars in NGC 6681
- Virtual Journal - Volume 15, Issue 35 - article #31
- Erin M. OÃ¢Â€Â™Malley, Alexei Knaizev, Andrew McWilliam,, Brian Chaboyer
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/846/1/23
APOGEE Chemical Abundances of the Sagittarius Dwarf Galaxy. (arXiv:1707.03456v1 [astro-ph.GA])
- Virtual Journal - Volume 15, Issue 28 - article #2
- Sten Hasselquist, Matthew Shetrone, Verne Smith, Jon Holtzman, Andrew McWilliam, J. G. Fernández-Trincado, Timothy C. Beers, Steven R. Majewski, David L. Nidever, Baitian Tang, Patricia B. Tissera, Emma Fernández Alvar, Carlos Allende Prieto, Andres Almeida, Borja Anguiano, Giuseppina Battaglia, Leticia Carigi, Gloria Delgado Inglada, Peter Frinchaboy, D. A. García-Hernández, Doug Geisler, Dante Minniti, Vinicius M. Placco, Mathias Schultheis, Jennifer Sobeck, Sandro Villanova
- http://arxiv.org/abs/1707.03456
High Resolution Spectroscopic Abundances of Red Giant Branch Stars in NGC 6681. (arXiv:1706.06962v1 [astro-ph.SR])
- Virtual Journal - Volume 15, Issue 25 - article #3
- Erin M. O'Malley, Alexei Kniazev, Andrew McWilliam, Brian Chaboyer
- http://arxiv.org/abs/1706.06962
A Differential Abundance Analysis of Very Metal-poor Stars
- Virtual Journal - Volume 15, Issue 13 - article #17
- Erin M. OÃ¢Â€Â™Malley, Andrew McWilliam, Brian Chaboyer,, Ian Thompson
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/838/2/90
A Differential Abundance Analysis of Very Metal-Poor Stars. (arXiv:1703.00019v1 [astro-ph.SR])
- Virtual Journal - Volume 15, Issue 9 - article #1
- Erin O'Malley, Andrew McWilliam, Brian Chaboyer, Ian Thompson
- http://arxiv.org/abs/1703.00019
Chemical Abundances of Two Stars in the Large Magellanic Cloud Globular Cluster NGC~1718. (arXiv:1701.03802v1 [astro-ph.GA])
- Virtual Journal - Volume 15, Issue 3 - article #6
- Charli Sakari, Andrew McWilliam, George Wallerstein
- http://arxiv.org/abs/1701.03802
The Chemical Composition of the Galactic Bulge and Implications for its Evolution. (arXiv:1607.05299v1 [astro-ph.GA])
- Virtual Journal - Volume 14, Issue 30 - article #14
- Andrew McWilliam
- http://arxiv.org/abs/1607.05299
The chemical composition of a regular halo globular cluster: NGC 5897
- Virtual Journal - Volume 12, Issue 21 - article #102
- 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
The chemical composition of a regular halo globular cluster: NGC 5897
- Virtual Journal - Volume 12, Issue 10 - article #9
- Andreas Koch, Andrew McWilliam
- arXiv.org - Astrophysics - Volume: 2014, Issue: 7 Mar
- arXiv:1403.1262 [pdf, ps, other]
Chemistry of the Sagittarius Dwarf Galaxy: A Top-light Initial Mass Function, Outflows, and the R-process
- Virtual Journal - Volume 11, Issue 47 - article #20
- Andrew McWilliam, George Wallerstein, and Marta Mottini
- The Astrophysical Journal - Volume: 778, Issue: 2
- View article PDF (1.39 MB)
Normal and Outlying Populations of the Milky Way Stellar Halo at [Fe/H] < -2
- Virtual Journal - Volume 11, Issue 41 - article #11
- Judith Cohen, Norbert Christlieb, Ian Thompson, Andrew McWilliam, Stephen Shectman, Dieter Reimers, Lutz Wisotzki, Evan Kirby
- arXiv.org - Astrophysics - Volume: 2013, Issue: 11 Oct
- arXiv:1310.1527 [pdf, ps, other]
Chemistry of the Sagittarius Dwarf Galaxy: a Top-Light IMF, Outflows and the R-Process
- Virtual Journal - Volume 11, Issue 37 - article #4
- Andrew McWilliam, George Wallerstein, Marta Mottini
- arXiv.org - Astrophysics - Volume: 2013, Issue: 13 Sep
- arXiv:1309.2974 [pdf, ps, other]
Spectrum Syntheses of High Resolution Integrated Light Spectra of Galactic Globular Clusters
- Virtual Journal - Volume 11, Issue 24 - article #7
- Charli M. Sakari, Matthew Shetrone, Kim Venn, Andrew McWilliam, Aaron Dotter
- arXiv.org - Astrophysics - Volume: 2013, Issue: 14 Jun
- arXiv:1306.1834 [pdf, ps, other]
A comprehensive chemical abundance study of the outer halo globular cluster M 75
- Virtual Journal - Volume 11, Issue 16 - article #1
- Nikolay Kacharov, Andreas Koch, Andrew McWilliam
- arXiv.org - Astrophysics - Volume: 2013, Issue: 19 Apr
- arXiv:1304.4247 [pdf, ps, other]
Globular Cluster Abundances from High-resolution, Integrated-light Spectroscopy. IV. The Large Magellanic Cloud: α, Fe-peak, Light, and Heavy Elements
- Virtual Journal - Volume 10, Issue 15 - article #37
- Janet E. Colucci, Rebecca A. Bernstein, Scott A. Cameron, and Andrew McWilliam
- The Astrophysical Journal - Volume: 746, Issue: 1
- Abstract References Cited by Full text PDF (5.36 MB) HTML with Enhancements
A Differential Chemical Element Analysis of the Metal-poor Globular Cluster NGCÂ 6397
- Virtual Journal - Volume 9, Issue 37 - article #27
- Andreas Koch and Andrew McWilliam
- Astronomical Journal - Volume: 142, Issue: 2
- doi:10.1088/0004-6256/142/2/63 Tag this article
RR Lyrae Stars, Metal-Poor Stars, and the Galaxy
- Virtual Journal - Volume 9, Issue 36 - article #13
- Andrew McWilliam (Carnegie Observatories)
- arXiv.org - Astrophysics - Volume: 2011, Issue: 9 Sep
- arXiv:1109.1324 [html, other]
Globular Cluster Abundances from High-resolution, Integrated-light Spectroscopy. III. The Large Magellanic Cloud: Fe and Ages
- Virtual Journal - Volume 9, Issue 26 - article #45
- Janet E. Colucci, Rebecca A. Bernstein, Scott A. Cameron and Andrew McWilliam
- The Astrophysical Journal - Volume: 735, Issue: 1
- Abstract References Full text PDF (3.13 MB) HTML with Enhancements
A differential chemical element analysis of the metal poor Globular Cluster NGC 6397
- Virtual Journal - Volume 9, Issue 25 - article #4
- Andreas Koch, Andrew McWilliam
- arXiv.org - Astrophysics - Volume: 2011, Issue: 24 Jun
- arXiv:1106.4544 [pdf, ps, other]
A Status Report on the 0Z Project
- Virtual Journal - Volume 9, Issue 18 - article #3
- Judith G. Cohen, Norbert Christlieb, Andrew McWilliam, Stephen Shectman, Ian Thompson
- arXiv.org - Astrophysics - Volume: 2011, Issue: 6 May
- arXiv:1105.1126 [pdf, ps, other]
Alpha Enhancement and the Metallicity Distribution Function of Plaut's Window
- Virtual Journal - Volume 9, Issue 11 - article #4
- Christian I. Johnson, R. Michael Rich, Jon P. Fulbright, Elena Valenti, Andrew McWilliam
- arXiv.org - Astrophysics - Volume: 2011, Issue: 18 Mar
- arXiv:1103.2143 [pdf, ps, other]
Galactic chemical evolution: the observational side
- Virtual Journal - Volume 8, Issue 48 - article #7
- Andrew McWilliam (Carnegie Observatories)
- arXiv.org - Astrophysics - Volume: 2010, Issue: 25 Nov
- arXiv:1011.4995 [pdf, ps, other]
A Differential Chemical Abundance Scale for the Globular Cluster M5
- Virtual Journal - Volume 8, Issue 20 - article #25
- Andreas Koch and Andrew McWilliam
- Astronomical Journal - Volume: 139, Issue: 6
- Abstract References Full text PDF (546 KB) HTML with Enhancements
A differential chemical abundance scale for the globular cluster M5
- Virtual Journal - Volume 8, Issue 14 - article #1
- Andreas Koch, Andrew McWilliam
- arXiv.org - Astrophysics - Volume: 2010, Issue: 2 Apr
- arXiv:1003.5010 [pdf, ps, other]
M31 Globular Cluster Abundances from High-Resolution, Integrated-Light Spectroscopy
- Virtual Journal - Volume 7, Issue 40 - article #41
- <em >Janet E. Colucci, Rebecca A. Bernstein, Scott Cameron, Andrew McWilliam, and Judith G. Cohen</em&gt,
- The Astrophysical Journal - Volume: 704, Issue: 1
- Abstract | References
Globular Cluster Abundances from High-Resolution Integrated-Light Spectra. I. 47 Tuc
- Virtual Journal - Volume 6, Issue 35 - article #23
- Andrew McWilliam and Rebecca A. Bernstein
- The Astrophysical Journal - Volume: 684, Issue: 1
- Abstract-Full Text-PDF Version (2144 kB)
ARP 2 and Terzan 8: A Detailed Chemical Analysis
- Virtual Journal - Volume 6, Issue 29 - article #14
- <em >Marta Mottini, George Wallerstein, and Andrew McWilliam</em&gt,
- Astronomical Journal - Volume: 136, Issue: 2
- Abstract | References | Citing articles
New Extremely Metal‐Poor Stars in the Galactic Halo
- Virtual Journal - Volume 6, Issue 2 - article #23
- Judith G. Cohen, Norbert Christlieb, Andrew McWilliam, Stephen Shectman, Ian Thompson, Jorge Melendez, Lutz Wisotzki, and Dieter Reimers
- The Astrophysical Journal - Volume: 672, Issue: 1
- Abstract-Full Text-PDF Version (486 kB)
New Extremely Metal-Poor Stars in the Galactic Halo
- Virtual Journal - Volume 5, Issue 36 - article #16
- Judith G. Cohen, Norbert Christlieb, Andrew McWilliam, Stephen Shectman, Ian Thompson, Jorge Melendez, Lutz Wisotzki, Dieter Reimers
- ArXiv - Astrophysics
- arXiv:0709.0029 [ps, pdf, other]
New Extremely Metal-Poor Stars in the Galactic Halo
- Virtual Journal - Volume 5, Issue 35 - article #13
- Judith G. Cohen, Norbert Christlieb, Andrew McWilliam, Stephen Shectman, Ian Thompson, Jorge Melendez, Lutz Wisotzki, Dieter Reimers
- ArXiv - Astrophysics
- arXiv:0709.0029 [ps, pdf, other]
A New Type of Extremely Metal Poor Star
- Virtual Journal - Volume 5, Issue 11 - article #39
- Judith G. Cohen, Andrew McWilliam, Norbert Christlieb, Stephen Shectman, Ian Thompson, Jorge Melendez, Lutz Wisotzki, Dieter Reimers
- ArXiv - Astrophysics
- astro-ph/0703341 [abs, ps, pdf, other]
CARBON STARS IN THE HAMBURG/ESO SURVEY: ABUNDANCES
- Virtual Journal - Volume 4, Issue 26 - article #23
- Judith G. Cohen, Andrew McWilliam, Stephen Shectman, Ian Thompson, Norbert Christlieb, Jorge Melendez, Solange Ramirez, Amber Swensson, and Franz-Josef Zickgraf
- Astronomical Journal - Volume 132, Issue 1
- Abstract Full Text with Enhancements PDF (416 kB)
SN 2005bf: A Possible Transition Event between Type Ib/c Supernovae and Gamma-Ray Bursts
- Virtual Journal - Volume 4, Issue 15 - article #5
- GastÃ³n Folatelli, Carlos Contreras, M. M. Phillips, S. E. Woosley, Sergei Blinnikov, Nidia Morrell, Nicholas B. Suntzeff, Brian L. Lee, Mario Hamuy, Sergio GonzÃ¡lez, Wojtek Krzeminski, Miguel Roth, Weidong Li, Alexei V. Filippenko, Ryan J. Foley, W. L. Freedman, Barry F. Madore, S. E. Persson, David Murphy, Samuel Boissier, Gaspar Galaz, Luis GonzÃ¡lez, P. J. McCarthy, Andrew McWilliam, and Wojtek Pych
- ABSTRACT , FULL TEXT , PDF (842 kB) , PS
Carbon Stars in the Hamburg/ESO Survey: Abundances
- Virtual Journal - Volume 4, Issue 12 - article #23
- Judith G. Cohen, Andrew McWilliam, Stephen Shectman, Ian Thompson, Norbert Christlieb, Jorge Melendez, Solange Ramirez, Amber Swensson, Franz-Josef Zickgraf
- ArXiv - Astrophysics
- astro-ph/0603582 [abs, ps, pdf, other]
The Frequency of Carbon Stars among Extremely Metal-poor Stars
- Virtual Journal - Volume 3, Issue 44 - article #24
- Judith G. Cohen, Stephen Shectman, Ian Thompson, Andrew McWilliam, Norbert Christlieb, Jorge Melendez, Franz-Josef Zickgraf, Solange RamÃrez, and Amber Swenson
- Astrophysical Jounral Letters – Vol. 633, No. 2 – November 2005
- ABSTRACT, FULL TEXT WITH ENHANCEMENTS, PDF (220 kB), PS
Abundances of Baade's Window Giants from Keck/HIRES Spectra: I. Stellar Parameters and [Fe/H] Values
- Virtual Journal - Volume 3, Issue 42 - article #21
- Jon. P. Fulbright (OCIW), Andrew McWilliam (OCIW), R. Michael Rich (UCLA)
- ArXiv - Astrophysics – October 2005
- astro-ph/0510408 [abs, ps, pdf, other]
The Frequency of Carbon Stars Among Extremely Metal-Poor Stars
- Virtual Journal - Volume 3, Issue 40 - article #11
- Judith G. Cohen, Stephen Shectman, Ian Thompson, Andrew McWilliam, Norbert Christlieb, Jorge Melendez, Franz-Josef Zickgraf, Solange Ramirez, Amber Swenson
- ArXiv - Astrophysics – October 2005
- astro-ph/0510105 [abs, ps, pdf, other]
SN 2005bf: A Transition Event Between Type Ib/c Supernovae and Gamma Ray Bursts
- Virtual Journal - Volume 3, Issue 39 - article #18
- Gaston Folatelli, Carlos Contreras, M. M. Phillips, S. E. Woosley, Sergei Blinnikov, Nidia Morrell, Nicholas B. Suntzeff, Brian L. Lee, Mario Hamuy, Sergio Gonzalez, Wojtek Krzeminski, Miguel Roth, Weidong Li, Alexei V. Filippenko, W. L. Freedman, Barry F. Madore, S. E. Persson, David Murphy, Samuel Boissier, Gaspar Galaz, Luis Gonzalez, P. J. McCarthy, Andrew McWilliam, Wojtek Pych
- ArXiv - Astrophysics – September 2005
- astro-ph/0509731 [abs, ps, pdf, other]
The Frequency of Carbon Rich Stars Among Extremely Metal Poor Stars
- Virtual Journal - Volume 3, Issue 26 - article #4
- Judith G. Cohen, Stephen Shectman, Ian Thompson, Andrew McWilliam, Norbert Christlieb, Jorge Melendez, Franz-Josef Zickgraf, Solange RamÃrez, Amber Swenson
- ArXiv - Astrophysics – July 2005
- astro-ph/0506745 [ abs , ps , pdf , other ]
Abundance Ratios in the Galactic Bulge and Super Metal-Rich Type II Nucleosynthesis: Pitfalls of the Analysis
- Virtual Journal - Volume 3, Issue 25 - article #102
- Jon P. Fulbright, R. Michael Rich and Andrew McWilliam
- Nuclear Physics A – Vol. 758 – June 2005
- Abstract , Abstract + References , PDF (231 K)
The Unusual Abundance of Copper in the Sagittarius Dwarf Spheroidal Galaxy and Implications for the Origin of Centauri
- Virtual Journal - Volume 3, Issue 10 - article #29
- Andrew McWilliam and Tammy A. Smecker-Hane
- Astrophysical Journal Letters – Vol. 622, No. 1 – March 2005
- ABSTRACT , FULL TEXT , PDF (62 kB) , PS
Abundance Ratios in the Galactic Bulge and Super Metal-Rich Type II Nucle osynthesis
- Virtual Journal - Volume 2, Issue 44 - article #10
- Jon P. Fulbright (OCIW), R. Michael Rich (UCLA), Andrew McWilliam (OCIW)
- arXiv - Astrophysics – November 2004
- astro-ph/0411041 [ abs , ps , pdf , other ]
Abundances In Very Metal-Poor Dwarf Stars
- Virtual Journal - Volume 2, Issue 37 - article #30
- Judith G. Cohen, Norbert Christlieb, Andrew McWilliam, Steve Shectman, Ian Thompson, G. J. Wasserburg, Inese Ivans, Matthias Dehn, Torgny Karlsson, and J. Melendez
- Astrophysical Journal – Vol 612, No 2 – September 2004
- ABSTRACT , FULL TEXT WITH ENHANCEMENTS , PDF (637 kB), PS
The Composition of the Sagittarius Dwarf Spheroidal Galaxy and Implications for Nucleosynthesis and Chemical Evolution
- Virtual Journal - Volume 2, Issue 36 - article #17
- Andrew McWilliam (1), Tammy A. Smecker-Hane (2) ((1) Carnegie Observatories, (2) Physics and Astronomy Department, U.C. Irvine)
- arXiv – Astrophysics – September 2004
- astro-ph/0409083 [ abs , ps , pdf , other ]
Abundances In Very Metal Poor Dwarf Stars
- Virtual Journal - Volume 2, Issue 20 - article #16
- Judith G. Cohen, Norbert Christlieb, Andrew McWilliam, Steve Shectman, Ian Thompson, G.J. Wasserburg, Inese Ivans, Matthias Dehn, Torgny Karlsson, J.Melendez
- arXiv.org - Astrophysics – May 2004
- astro-ph/0405286 [ abs , ps , pdf , other ]
Erratum: "Constraints on the Origin of Manganese from the Composition of the Sagittarius Dwarf Spheroidal Galaxy and the Galactic Bulge" ( ApJ, 592, L21 [2003] )
- Virtual Journal - Volume 1, Issue 5 - article #30
- Andrew McWilliam, R. Michael Rich, and Tammy A. Smecker-Hane
- The Astrophysical Journal Letters - Volume 593, Number 2, Part 2
- FULL TEXT , PDF (36kb), PS
Constraints on the Origin of Manganese from the Composition of the Sagittarius Dwarf Spheroidal Galaxy and the Galactic Bulge
- Virtual Journal - Volume 1, Issue 2 - article #4
- Andrew McWilliam, R. Michael Rich, and Tammy A. Smecker-Hane
- The Astrophysical Journal Letters, Volume 592, Number 1, Part 2
- ABSTRACT , FULL TEXT , PDF (67kb), PS

Results 1 - 52 of 52

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