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Results 1 - 47 of 47

Vanadium Abundance Derivations in 255 Metal-poor Stars
- Volume 15, Issue 37 - article #16
- Xiaowei Ou, Ian U. Roederer, Christopher Sneden, John J. Cowan, James E. Lawler, Stephen A. Shectman,, Ian B. Thompson
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/900/2/106
The R -Process Alliance: Fourth Data Release from the Search for R -process-enhanced Stars in the Galactic Halo
- Volume 15, Issue 32 - article #15
- Erika M. Holmbeck, Terese T. Hansen, Timothy C. Beers, Vinicius M. Placco, Devin D. Whitten, Kaitlin C. Rasmussen, Ian U. Roederer, Rana Ezzeddine, Charli M. Sakari, Anna Frebel, Maria R. Drout, Joshua D. Simon, Ian B. Thompson, Joss Bland-Hawthorn, Brad K. Gibson, Eva K. Grebel, Georges Kordopatis, Andrea Kunder, Jorge MelÃ©ndez, Julio F. Navarro, Warren A. Reid, George Seabroke, Matthias Steinmetz, Fred Watson,, Rosemary F. Ä . Wyse
- The Astrophysical Journal Supplement Series
- http://iopscience.iop.org/0067-0049/249/2/30
The $R$-Process Alliance: Fourth Data Release from the Search for $r$-Process-Enhanced Stars in the Galactic Halo. (arXiv:2007.00749v1 [astro-ph.SR])
- Volume 15, Issue 27 - article #4
- Erika M. Holmbeck, Terese T. Hansen, Timothy C. Beers, Vinicius M. Placco, Devin D. Whitten, Kaitlin C. Rasmussen, Ian U. Roederer, Rana Ezzeddine, Charli M. Sakari, Anna Frebel, Maria R. Drout, Joshua D. Simon, Ian B. Thompson, Joss Bland-Hawthorn, Brad K. Gibson, Eva K. Grebel, Georges Kordopatis, Andrea Kunder, Jorge Melendez, Julio F. Navarro, Warren A.Reid, George Seabroke, Matthias Steinmetz, Fred Watson, Rosemary F.G. Wyse
- http://arxiv.org/abs/2007.00749
Chemical Abundance Signature of J0023+0307: A Second-generation Main-sequence Star with [Fe/H] < −6
- Volume 14, Issue 5 - article #3
- Anna Frebel, Alexander P. Ji, Rana Ezzeddine, Terese T. Hansen, Anirudh Chiti, Ian B. Thompson,, Thibault Merle
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/871/2/146
An Ultra Metal-poor Star Near the Hydrogen-burning Limit. (arXiv:1811.00549v1 [astro-ph.SR])
- Volume 13, Issue 45 - article #1
- Kevin C. Schlaufman, Ian B. Thompson, Andrew R. Casey
- http://arxiv.org/abs/1811.00549
An Ultra Metal-poor Star Near the Hydrogen-burning Limit
- Volume 13, Issue 45 - article #8
- Kevin C. Schlaufman, Ian B. Thompson,, Andrew R. Casey
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/867/2/98
The R -process Alliance: First Release from the Southern Search for R -process-enhanced Stars in the Galactic Halo
- Volume 13, Issue 19 - article #20
- Terese T. Hansen, Erika M. Holmbeck, Timothy C. Beers, Vinicius M. Placco, Ian U. Roederer, Anna Frebel, Charli M. Sakari, Joshua D. Simon,, Ian B. Thompson
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/858/2/92
The $R$-Process Alliance: First Release from the Southern Search for $r$-Process-Enhanced Stars in the Galactic Halo. (arXiv:1804.03114v1 [astro-ph.SR])
- Volume 13, Issue 15 - article #13
- Terese T. Hansen, Erika M. Holmbeck, Timothy C. Beers, Vinicius M. Placco, Ian U. Roederer, Anna Frebel, Charli M. Sakari, Joshua D. Simon, Ian B. Thompson
- http://arxiv.org/abs/1804.03114
Detection of a Population of Carbon-enhanced Metal-poor Stars in the Sculptor Dwarf Spheroidal Galaxy
- Volume 13, Issue 14 - article #19
- Anirudh Chiti, Joshua D. Simon, Anna Frebel, Ian B. Thompson, Stephen A. Shectman, Mario Mateo, John I. Bailey III, Jeffrey D. Crane,, Matthew Walker
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/856/2/142
Detection of a population of carbon-enhanced metal-poor stars in the Sculptor dwarf spheroidal galaxy. (arXiv:1803.04538v1 [astro-ph.GA])
- Volume 13, Issue 11 - article #1
- Anirudh Chiti, Joshua D. Simon, Anna Frebel, Ian B. Thompson, Stephen A. Shectman, Mario Mateo, John I. Bailey III, Jeffrey D. Crane, Matthew Walker
- http://arxiv.org/abs/1803.04538
Metal-rich RRc Stars in the Carnegie RR Lyrae Survey
- Volume 13, Issue 1 - article #4
- Christopher Sneden, George W. Preston, Juna A. Kollmeier, Jeffrey D. Crane, Nidia Morrell, JosÃ© L. Prieto, Stephen A. Shectman, Dorota M. Skowron,, Ian B. Thompson
- The Astronomical Journal
- http://iopscience.iop.org/1538-3881/155/1/45
Metal-Rich RRc stars in the Carnegie RR Lyrae Survey. (arXiv:1712.00159v1 [astro-ph.SR])
- Volume 12, Issue 49 - article #4
- Christopher Sneden, George W.Preston, Juna A. Kollmeier, Jeffrey D. Crane, Nidia Morrell, Jose L. Prieto, Stephen A. Shectman, Dorota M. Skowron, Ian B. Thompson
- http://arxiv.org/abs/1712.00159
SMHASH: Anatomy of the Orphan Stream using RR Lyrae stars. (arXiv:1711.04663v1 [astro-ph.GA])
- Volume 12, Issue 46 - article #6
- David Hendel, Victoria Scowcroft, Kathryn V. Johnston, Mark A. Fardal, Roeland P. van der Marel, Sangmo Tony Sohn, Adrian M. Price-Whelan, Rachael L. Beaton, Gurtina Besla, Giuseppe Bono, Maria-Rosa L. Cioni, Gisella Clementini, Judith G. Cohen, Michele Fabrizio, Wendy L. Freedman, Alessia Garofalo, Carl J. Grillmair, Nitya Kallivayalil, Juna A. Kollmeier, David R. Law, Barry F. Madore, Steven R. Majewski, Massimo Marengo, Andrew J. Monson, Jillian R. Neeley, David L. Nidever, Grzegorz Pietrzyński, Mark Seibert, Branimir Sesar, Horace A. Smith, Igor Soszyński, Ian B. Thompson, Andrezej Udalski
- http://arxiv.org/abs/1711.04663
Detailed Chemical Abundances in the r-Process-Rich Ultra-Faint Dwarf Galaxy Reticulum 2
- Volume 11, Issue 4 - article #2
- Ian U. Roederer (U. Michigan, JINA-CEE), Mario Mateo (U. Michigan), John I. Bailey III (U. Michigan), Yingyi Song (U. Michigan), Eric F. Bell (U. Michigan), Jeffrey D. Crane (Carnegie Observatories), Sarah Loebman (U. Michigan), David L. Nidever (LSST, Steward Observatory), Edward W. Olszewski (Steward Observatory), Stephen A. Shectman (Carnegie Observatories), Ian B. Thompson (Carnegie Observatories), Monica Valluri (U. Michigan), Matthew G. Walker (Carnegie Mellon U.)
- arXiv.org - Astrophysics - Volume: 2016, Issue: 22 Jan
- arXiv:1601.04070 [pdf, other]
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]
Detailed abundances of 15 stars in the metal-poor globular cluster NGC 4833
- Volume 10, Issue 16 - article #20
- Ian U. Roederer and Ian B. Thompson
- Monthly Notices of the Royal Astronomical Society - Volume: 449, Issue: 4
- Abstract Full Text (HTML) Full Text (PDF) SUPPORTING INFORMATION
Chemical Signatures of the First Supernovae in the Sculptor Dwarf Spheroidal Galaxy
- Volume 10, Issue 13 - article #21
- Joshua D. Simon, Heather R. Jacobson, Anna Frebel, Ian B. Thompson, Joshua J. Adams, and Stephen A. Shectman
- The Astrophysical Journal - Volume: 802, Issue: 2
- View article PDF (368 KB)
Detailed Abundances of 15 Stars in the Metal-Poor Globular Cluster NGC 4833
- Volume 10, Issue 10 - article #4
- Ian U. Roederer (University of Michigan), Ian B. Thompson (Carnegie Observatories)
- arXiv.org - Astrophysics - Volume: 2015, Issue: 13 Mar
- arXiv:1503.03079 [pdf, ps, other]
Chemical Signatures of the First Supernovae in the Sculptor Dwarf Spheroidal Galaxy
- Volume 9, Issue 25 - article #17
- Joshua D. Simon (Carnegie Observatories), Heather R. Jacobson, Anna Frebel (MIT), Ian B. Thompson (Carnegie Observatories), Joshua J. Adams (ASML), Stephen A. Shectman (Carnegie Observatories)
- arXiv.org - Astrophysics - Volume: 2014, Issue: 19 Dec
- arXiv:1412.5176 [pdf, ps, other]
Nine new metal-poor stars on the subgiant and red horizontal branches with high levels of r-process enhancement
- Volume 9, Issue 24 - article #53
- Ian U. Roederer, John J. Cowan, George W. Preston, Stephen A. Shectman, Christopher Sneden, and Ian B. Thompson
- Monthly Notices of the Royal Astronomical Society - Volume: 445, Issue: 3
- Abstract Full Text (HTML) Full Text (PDF)
Nine New Metal-Poor Stars on the Subgiant and Red Horizontal Branches with High Levels of r-process Enhancement
- Volume 9, Issue 22 - article #34
- Ian U. Roederer (U. Michigan), John J. Cowan (U. Oklahoma), George W. Preston, Stephen A. Shectman (Carnegie Observatories), Chris Sneden (U. Texas), Ian B. Thompson (Carnegie Observatories)
- arXiv.org - Astrophysics - Volume: 2014, Issue: 26 Sep
- arXiv:1409.5810 [pdf, ps, other]
A Search for Stars of Very Low Metal Abundance. VI. Detailed Abundances of 313 Metal-poor Stars
- Volume 9, Issue 20 - article #143
- Ian U. Roederer, George W. Preston, Ian B. Thompson, Stephen A. Shectman, Christopher Sneden, Gregory S. Burley, and Daniel D. Kelson
- Astronomical Journal - Volume: 147, Issue: 6
- View article PDF (5.13 MB)
Neutron-capture Nucleosynthesis in the First Stars
- Volume 9, Issue 17 - article #24
- Ian U. Roederer, George W. Preston, Ian B. Thompson, Stephen A. Shectman, and Christopher Sneden
- The Astrophysical Journal - Volume: 784, Issue: 2
- View article PDF (1.39 MB)
A Search for Stars of Very Low Metal Abundance. VI. Detailed Abundances of 313 Metal-Poor Stars
- Volume 9, Issue 13 - article #2
- Ian U. Roederer, George W. Preston, Ian B. Thompson, Stephen A. Shectman, Christopher Sneden, Gregory S. Burley, Daniel D. Kelson
- arXiv.org - Astrophysics - Volume: 2014, Issue: 28 Mar
- arXiv:1403.6853 [pdf, other]
Neutron-Capture Nucleosynthesis in the First Stars
- Volume 9, Issue 8 - article #5
- Ian U. Roederer (University of Michigan), George W. Preston, Ian B. Thompson, Stephen A. Shectman (Carnegie Observatories), Chris Sneden (University of Texas)
- arXiv.org - Astrophysics - Volume: 2014, Issue: 21 Feb
- arXiv:1402.4144 [pdf, ps, other]
New Hubble Space Telescope Observations of Heavy Elements in Four Metal-Poor Stars
- Volume 7, Issue 52 - article #29
- Ian U. Roederer, James E. Lawler, Jennifer S. Sobeck, Timothy C. Beers, John J. Cowan, Anna Frebel, Inese I. Ivans, Hendrik Schatz, Christopher Sneden, and Ian B. Thompson
- The Astrophysical Journal Supplement - Volume: 203, Issue: 2
- Abstract References Cited by Full text PDF (2.07 MB) HTML with Enhancements
New Hubble Space Telescope Observations of Heavy Elements in Four Metal-Poor Stars
- Volume 7, Issue 43 - article #6
- Ian U. Roederer, James E. Lawler, Jennifer S. Sobeck, Timothy C. Beers, John J. Cowan, Anna Frebel, Inese I. Ivans, Hendrik Schatz, Christopher Sneden, Ian B. Thompson
- arXiv.org - Astrophysics - Volume: 2012, Issue: 26 Oct
- arXiv:1210.6387 [pdf, ps, other]
The Absolute Magnitude of RRc Variables From Statistical Parallax
- Volume 7, Issue 33 - article #11
- Juna A. Kollmeier, Dorota M. Szczygiel, Christopher R. Burns, Andrew Gould, Ian B. Thompson, George W. Preston, Christopher Sneden, Jeffrey D. Crane, Subo Dong, Barry F. Madore, Nidia Morrell, Jose L. Prieto, Stephen Shectman, Joshua D. Simon, Edward Villanueva
- arXiv.org - Astrophysics - Volume: 2012, Issue: 17 Aug
- arXiv:1208.2689 [pdf, 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]
The Abundances of Neutron-capture Species in the Very Metal-poor Globular Cluster M15: A Uniform Analysis of Red Giant Branch and Red Horizontal Branch Stars
- Volume 6, Issue 23 - article #18
- Jennifer S. Sobeck, Robert P. Kraft, Christopher Sneden, George W. Preston, John J. Cowan, Graeme H. Smith, Ian B. Thompson, Stephen A. Shectman and Gregory S. Burley
- Astronomical Journal - Volume: 141, Issue: 6
- doi: 10.1088/0004-6256/141/6/175 Tag this article
High-resolution Spectroscopy of Extremely Metal-poor Stars in the Least Evolved Galaxies: Leo IV
- Volume 5, Issue 22 - article #53
- Joshua D. Simon, Anna Frebel, Andrew McWilliam, Evan N. Kirby, and Ian B. Thompson
- The Astrophysical Journal - Volume: 716, Issue: 1
- Abstract References Full text PDF (385 KB) View as HTML
Characterizing the Chemistry of the Milky Way Stellar Halo: Detailed Chemical Analysis of a Metal-poor Stellar Stream
- Volume 5, Issue 9 - article #27
- <em >Ian U. Roederer, Christopher Sneden, Ian B. Thompson, George W. Preston, and Stephen A. Shectman</em&gt,
- The Astrophysical Journal - Volume: 711, Issue: 2
- Abstract | References
High-Resolution Spectroscopy of Extremely Metal-Poor Stars in the Least Evolved Galaxies: Leo IV
- Volume 5, Issue 4 - article #9
- Joshua D. Simon (Carnegie Observatories), Anna Frebel (CfA), Andrew McWilliam (Carnegie Observatories), Evan N. Kirby (Caltech), Ian B. Thompson (Carnegie Observatories)
- arXiv.org - Astrophysics - Volume: 2010, Issue: 22 Jan
- arXiv:1001.3137 [ps, pdf, other]
Characterizing the Chemistry of the Milky Way Stellar Halo: Detailed Chemical Analysis of a Metal-Poor Stellar Stream
- Volume 5, Issue 3 - article #4
- Ian U. Roederer, Christopher Sneden, Ian B. Thompson, George W. Preston, Stephen A. Shectman
- arXiv.org - Astrophysics - Volume: 2010, Issue: 15 Jan
- arXiv:1001.1745 [ps, pdf, other]
A Puzzle Involving Galactic Bulge Microlensing Events
- Volume 4, Issue 48 - article #2
- Judith G. Cohen, Andrew Gould, Ian B. Thompson, Sofia Feltzing, Thomas Bensby, Jennifer A. Johnson, Wenjin Huang, Jorge Melendez, Sara Lucatello, Martin Asplund
- arXiv.org - Astrophysics - Volume: 2009, Issue: 26 Nov
- arXiv:0911.5081 [ps, pdf, other]
Spectroscopic Confirmation of the Pisces Overdensity
- Volume 4, Issue 44 - article #28
- Juna A. Kollmeier, Andrew Gould, Stephen Shectman, Ian B. Thompson, George W. Preston, Joshua D. Simon, Jeffrey D. Crane, Željko Ivezić, and Branimir Sesar
- The Astrophysical Journal Letters - Volume: 705, Issue: 2
- Abstract | References
Variable Stars in the Globular Cluster NGC 6752
- Volume 4, Issue 43 - article #11
- Janusz Kaluzny, Ian B. Thompson
- arXiv.org - Astrophysics - Volume: 2009, Issue: 23 Oct
- arXiv:0910.3296 [ps, pdf, other]
Spectroscopic Confirmation of the Pisces Overdensity
- Volume 4, Issue 33 - article #7
- Juna A. Kollmeier (1), Andrew Gould (2), Stephen Shectman (1), Ian B. Thompson (1), George W. Preston (1), Joshua D. Simon (1), Jeffrey D. Crane (1), Željko Ivezić, (3), Branimir Sesar (3) ((1) Carnegie Observatories, (2) The Ohio State University, (3) University of Washington)
- arXiv.org - Astrophysics - Volume: 2009, Issue: 14 Aug
- arXiv:0908.1381 [ps, pdf, other]
Clues to the Metallicity Distribution in the Galactic Bulge: Abundances in MOA-2008-BLG-310S and MOA-2008-BLG-311S
- Volume 4, Issue 25 - article #32
- <em >Judith G. Cohen, Ian B. Thompson, Takahiro Sumi, Ian Bond, Andrew Gould, Jennifer A. Johnson, Wenjin Huang, and Greg Burley</em&gt,
- The Astrophysical Journal - Volume: 699, Issue: 1
- Abstract | References
The Araucaria Project. Determination of the Large Magellanic Cloud Distance from Late-Type Eclipsing Binary Systems. I. OGLE-051019.64-685812.3
- Volume 4, Issue 19 - article #29
- Grzegorz Pietrzyński, Ian B. Thompson, Dariusz Graczyk, Wolfgang Gieren, Andrzej Udalski, Olaf Szewczyk, Dante Minniti, Zbigniew Kołaczkowski, Fabio Bresolin, and Rolf-Peter Kudritzki
- The Astrophysical Journal - Volume: 697, Issue: 1
- Abstract | References
Clues to the Metallicity Distribution in the Galactic Bulge: Abundances in MOA-2008-BLG310 and MOA-2008-BLG311
- Volume 4, Issue 16 - article #1
- Judith G. Cohen, Ian B. Thompson, Takahiru Sumi, Ian Bond, Andrew Gould, Jennifer A. Johnson, Wenjin Huang, Greg Burley
- arXiv.org - Astrophysics - Volume: 2009, Issue: 17 Apr
- arXiv:0904.2020 [ps, pdf, other]
The MagE Spectrograph
- Volume 3, Issue 30 - article #9
- J. L. Marshall (1), Scott Burles (2), Ian B. Thompson (1), Stephen A. Shectman (1), Bruce C. Bigelow (3), Gregory Burley (1), Christoph Birk (1), Jorge Estrada (1), Patricio Jones (4), Matthew Smith (2), Vince Kowal (1), Jerson Castillo (1), Robert Storts (1), Greg Ortiz (1) ((1) Carnegie Observatories, (2) MIT, (3) UCO Lick, (4)Las Campanas Observatory)
- arXiv.org - Astrophysics - Volume: 2008, Issue: 24 Jul
- arXiv:0807.3774 [pdf]
CS 22964−161: A Double‐Lined Carbon‐ and s‐Process–Enhanced Metal‐Poor Binary Star
- Volume 3, Issue 14 - article #24
- Ian B. Thompson, Inese I. Ivans, Sara Bisterzo, Christopher Sneden, Roberto Gallino, Sylvie Vauclair, Gregory S. Burley, Stephen A. Shectman, and George W. Preston
- The Astrophysical Journal - Volume: 677, Issue: 1
- Abstract-Full Text-PDF Version (1116 kB)
CS22964-161: A Double-Lined Carbon- and s-Process-Enhanced Metal-Poor Binary Star
- Volume 2, Issue 52 - article #12
- Ian B. Thompson, Inese I. Ivans, Sara Bisterzo, Christopher Sneden, Roberto Gallino, Sylvie Vauclair, Gregory S. Burley, Stephen A. Shectman, George W. Preston
- arXiv.org - Astrophysics - Volume: 2007, Issue: 27 Dec
- arXiv:0712.3228 [ps, pdf, other]
CS22964-161: A Double-Lined Carbon- and s-Process-Enhanced Metal-Poor Binary Star
- Volume 2, Issue 51 - article #13
- Ian B. Thompson, Inese I. Ivans, Sara Bisterzo, Christopher Sneden, Roberto Gallino, Sylvie Vauclair, Gregory S. Burley, Stephen A. Shectman, George W. Preston
- arXiv.org - Astrophysics - Volume: 2007, Issue: 20 Dec
- arXiv:0712.3228 [ps, pdf, other]
TY GRUIS: A METAL-POOR CARBON AND NEUTRON-CAPTURE-RICH RR LYRAE STAR
- Volume 1, Issue 35 - article #21
- George W. Preston, Ian B. Thompson, Christopher Sneden, Greg Stachowski, and Stephen A. Shectman
- Astronomical Journal - Volume 132, Issue 4
- Abstract Full Text with Enhancements PDF (420 kB)
ATMOSPHERES, CHEMICAL COMPOSITIONS, AND EVOLUTIONARY HISTORIES OF VERY METAL-POOR RED HORIZONTAL-BRANCH STARS IN THE GALACTIC FIELD AND IN NGC 7078 (M15)
- Volume 1, Issue 22 - article #19
- George W. Preston, Christopher Sneden, Ian B. Thompson, Stephen A. Shectman, and Gregory S. Burley
- Astronomical Journal - Volume 132, Issue 1
- Abstract Full Text with Enhancements PDF (731 kB)

Results 1 - 47 of 47

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