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Results 1 - 86 of 86

The R -Process Alliance: First Magellan/MIKE Release from the Southern Search for R -process-enhanced Stars
- Volume 15, Issue 32 - article #12
- Rana Ezzeddine, Kaitlin Rasmussen, Anna Frebel, Anirudh Chiti, Karina Hinojisa, Vinicius M. Placco, Alexander P. Ji, Timothy C. Beers, Terese T. Hansen, Ian U. Roederer, Charli M. Sakari,, Jorge Melendez
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/898/2/150
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: A Very Metal-poor, Extremely r -process-enhanced Star with [Eu/Fe] = + 2.2, and the Class of r- III Stars
- Volume 15, Issue 30 - article #11
- Madelyn Cain, Anna Frebel, Alexander P. Ji, Vinicius M. Placco, Rana Ezzeddine, Ian U. Roederer, Kohei Hattori, Timothy C. Beers, Jorge MelÃ©ndez, Terese T. Hansen,, Charli M. Sakari
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/898/1/40
The R -process Alliance: The Peculiar Chemical Abundance Pattern of RAVE J183013.5−455510
- Volume 15, Issue 28 - article #17
- Vinicius M. Placco, Rafael M. Santucci, Zhen Yuan, Mohammad K. Mardini, Erika M. Holmbeck, Xilu Wang, Rebecca Surman, Terese T. Hansen, Ian U. Roederer, Timothy C. Beers, Arthur Choplin, Alexander P. Ji, Rana Ezzeddine, Anna Frebel, Charli M. Sakari, Devin D. Whitten,, Joseph Zepeda
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/897/1/78
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
The R-process Alliance: First Magellan/MIKE Release from the Southern Search for R-Process-enhanced Stars. (arXiv:2006.07731v1 [astro-ph.SR])
- Volume 15, Issue 25 - article #14
- Rana Ezzeddine, Kaitlin Rasmussen, Anna Frebel, Anirudh Chiti, Karina Hinojisa, Vinicius M. Placco, Ian U. Roederer, Alexander P. Ji, Timothy C. Beers, Terese T. Hansen, Charli M. Sakari, Jorge Melendez
- http://arxiv.org/abs/2006.07731
The R-Process Alliance: J1521-3538, a very metal-poor, extremely r-process-enhanced star with [Eu/Fe]=+2.2, and the class of r-III stars. (arXiv:2006.08080v1 [astro-ph.SR])
- Volume 15, Issue 25 - article #15
- Madelyn Cain (MIT, JINA), Anna Frebel (MIT, JINA), Alexander P. Ji (Carnegie), Vinicius M. Placco (Notre Dame, JINA), Rana Ezzeddine (MIT, JINA), Ian U. Roederer (U Michigan), Kohei Hattori (U Michigan, Carnegie Mellon), Timothy C. Beers (Notre Dame, JINA), Jorge Mélendez (Sao Paulo), Terese T. Hansen (Carnegie), Charli M. Sakari (San Francisco State U, JINA)
- http://arxiv.org/abs/2006.08080
The R-Process Alliance: The Peculiar Chemical Abundance Pattern of RAVE J183013.5-455510
- Volume 15, Issue 24 - article #17
- Vinicius M. Placco, Rafael M. Santucci, Zhen Yuan, Mohammad K. Mardini, Erika M. Holmbeck, Xilu Wang, Rebecca Surman, Terese T. Hansen, Ian U. Roederer, Timothy C. Beers, Arthur Choplin, Alexander P. Ji, Rana Ezzeddine, Anna Frebel, Charli M. Sakari, Devin D. Whitten, Joseph Zepeda
- http://arxiv.org/abs/2006.04538
Identification of a Group III CEMP-no Star in the Dwarf Spheroidal Galaxy Canes Venatici I
- Volume 15, Issue 18 - article #17
- Jinmi Yoon, Devin D. Whitten, Timothy C. Beers, Young Sun Lee, Thomas Masseron,, Vinicius M. Placco
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/894/1/7
The Metallicity Gradient and Complex Formation History of the Outermost Halo of the Milky Way
- Volume 15, Issue 18 - article #19
- Sarah E. Dietz, Jinmi Yoon, Timothy C. Beers,, Vinicius M. Placco
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/894/1/34
Dynamical Relics of the Ancient Galactic Halo
- Volume 15, Issue 10 - article #5
- Zhen Yuan, G. C. Myeong, Timothy C. Beers, N. W. Evans, Young Sun Lee, Projjwal Banerjee, Dmitrii Gudin, Kohei Hattori, Haining Li, Tadafumi Matsuno, Vinicius M. Placco, M. C. Smith, Devin D. Whitten,, Gang Zhao
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/891/1/39
The Metallicity Gradient and Complex Formation History of the Outermost Halo of the Milky Way. (arXiv:1911.11140v1 [astro-ph.GA])
- Volume 14, Issue 48 - article #2
- Sarah E. Dietz, Jinmi Yoon, Timothy C. Beers, Vinicius M. Placco
- http://arxiv.org/abs/1911.11140
Discovery of a New Stellar Subpopulation Residing in the (Inner) Stellar Halo of the Milky Way
- Volume 14, Issue 46 - article #17
- JosÃ© G. FernÃ¡ndez-Trincado, Timothy C. Beers, Vinicius M. Placco, Edmundo Moreno, Alan Alves-Brito, Dante Minniti, Baitian Tang, Angeles PÃ©rez-Villegas, CÃ©line ReylÃ©, Annie C. Robin,, Sandro Villanova
- The Astrophysical Journal Letters
- http://iopscience.iop.org/2041-8205/886/1/L8
Identification of a Group III CEMP-no Star in the Dwarf Spheroidal Galaxy Canes Venatici I. (arXiv:1910.10038v1 [astro-ph.SR])
- Volume 14, Issue 43 - article #3
- Jinmi Yoon, Devin D. Whitten, Timothy C. Beers, Young Sun Lee, Vinicius M. Placco
- http://arxiv.org/abs/1910.10038
Dynamical Relics of the Ancient Galactic Halo. (arXiv:1910.07538v1 [astro-ph.GA])
- Volume 14, Issue 42 - article #1
- Zhen Yuan (1), G.C. Myeong (2,3), Timothy C. Beers (4), N. Wyn Evans (3), Young Sun Lee (5), Projjwal Banerjee (6), Dmitrii Gudin (4), Kohei Hattori (7), Haining Li (8), Tadafumi Matsuno (9), Vinicius M. Placco (4), M. C. Smith (1), Devin D. Whitten (4), Gang Zhao (8) ((1) SAO, Shanghai, (2) CfA, Harvard, (3) IoA, Cambridge, (4) Notre Dame, (5) Chungnam Univ, Daejeon, (6) Indian Institute of Technology, Palakkad, (7) CMU, Pittsburgh (8) NAO, Beijing, (9) NAOJ, Tokyo)
- http://arxiv.org/abs/1910.07538
Constraints on the Galactic Inner Halo Assembly History from the Age Gradient of Blue Horizontal-branch Stars
- Volume 14, Issue 42 - article #9
- Devin D. Whitten, Timothy C. Beers, Vinicius M. Placco, Rafael M. Santucci, Pavel Denissenkov, Patricia B. Tissera, Andrea MejÃas, Nina Hernitschek,, Daniela Carollo
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/884/1/67
Metal-poor Stars Observed with the Automated Planet Finder Telescope. II. Chemodynamical Analysis of Six Low-Metallicity Stars in the Halo System of the Milky Way. (arXiv:1906.08439v1 [astro-ph.GA])
- Volume 14, Issue 25 - article #4
- Mohammad K. Mardini, Vinicius M. Placco, Ali Taani, Haining Li, Gang Zhao
- http://arxiv.org/abs/1906.08439
Evidence for an Aspherical Population III Supernova Explosion Inferred from the Hyper-metal-poor Star HE 1327–2326
- Volume 14, Issue 19 - article #8
- Rana Ezzeddine, Anna Frebel, Ian U. Roederer, Nozomu Tominaga, Jason Tumlinson, Miho Ishigaki, Kenâichi Nomoto, Vinicius M. Placco,, Wako Aoki
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/876/2/97
The discovery of anomalously high levels of [Si/Fe] among metal-poor giants in the bulge, disk, and halo of the Milky Way. (arXiv:1904.05884v1 [astro-ph.GA])
- Volume 14, Issue 16 - article #3
- José, G. Fernández-Trincado, Timothy C. Beers, Vinicius M. Placco, Sarah L. Martell, Edmundo Moreno, Baitian Tang, Alan Alves-Brito, Sandro Villanova, Mario Ortigoza-Urdaneta, Dante Minniti, Angeles Pérez-Villegas, Céline Reylé, Annie C. Robin
- http://arxiv.org/abs/1904.05884
Metal-poor Stars Observed with the Automated Planet Finder Telescope. I. Discovery of Five Carbon-enhanced Metal-poor Stars from LAMOST
- Volume 14, Issue 16 - article #16
- Mohammad K. Mardini, Haining Li, Vinicius M. Placco, Sofya Alexeeva, Daniela Carollo, Ali Taani, Iminhaji Ablimit, Liang Wang,, Gang Zhao
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/875/2/89
Evidence for an aspherical Population III supernova explosion inferred from the hyper metal-poor star HE1327-2326. (arXiv:1904.03211v1 [astro-ph.SR])
- Volume 14, Issue 15 - article #7
- Rana Ezzeddine, Anna Frebel, Ian U. Roederer, Nozomu Tominaga, Jason Tumlinson, Miho Ishigaki, Ken'ichi Nomoto, Vinicius M. Placco, Wako Aoki
- http://arxiv.org/abs/1904.03211
The R -Process Alliance: Discovery of a Low- α , r -process-enhanced Metal-poor Star in the Galactic Halo
- Volume 14, Issue 14 - article #19
- Charli M. Sakari, Ian U. Roederer, Vinicius M. Placco, Timothy C. Beers, Rana Ezzeddine, Anna Frebel, Terese Hansen, Christopher Sneden, John J. Cowan, George Wallerstein, Elizabeth M. Farrell, Kim A. Venn, Gal MatijeviÄ, Rosemary F. G. Wyse, Joss Bland-Hawthorn, Cristina Chiappini, Kenneth C. Freeman, Brad K. Gibson, Eva K. Grebel, Amina Helmi, Georges Kordopatis, Andrea Kunder, Julio Navarro, Warren Reid, George Seabroke, Matthias Steinmetz,, Fred Watson
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/874/2/148
The R-Process Alliance: Discovery of a low-alpha, r-Process-Enhanced Metal-Poor Star in the Galactic Halo. (arXiv:1903.01480v1 [astro-ph.SR])
- Volume 14, Issue 10 - article #12
- Charli M. Sakari, Ian U. Roederer, Vinicius M. Placco, Timothy C. Beers, Rana Ezzeddine, Anna Frebel, Terese Hansen, Christopher Sneden, John J. Cowan, George Wallerstein, Elizabeth M. Farrell, Kim A. Venn, Gal Matijevic, Rosemary F.G. Wyse, Joss Bland-Hawthorn, Cristina Chiappini, Kenneth C. Freeman, Brad K. Gibson, Eva K. Grebel, Amina Helmi, Georges Kordopatis, Andrea Kunder, Julio Navarro, Warren Reid, George Seabroke, Matthias Steinmetz, Fred Watson
- http://arxiv.org/abs/1903.01480
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
The R-Process Alliance: Spectroscopic Follow-up of Low-metallicity Star Candidates from the Best & Brightest Survey
- Volume 14, Issue 3 - article #15
- Vinicius M. Placco, Rafael M. Santucci, Timothy C. Beers, Julio ChanamÃ©, MarÃa Paz SepÃºlveda, Johanna Coronado, Silvia Rossi, Young Sun Lee, Else Starkenburg, Kris Youakim, Manuel Barrientos, Rana Ezzeddine, Anna Frebel, Terese T. Hansen, Erika M. Holmbeck, Alexander P. Ji, Kaitlin C. Rasmussen, Ian U. Roederer, Charli M. Sakari,, Devin D. Whitten
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/870/2/122
The Origin of the 300 km s −1 Stream near Segue 1
- Volume 13, Issue 41 - article #16
- Sal Wanying Fu, Joshua D. Simon, Matthew Shetrone, Jo Bovy, Timothy C. Beers, J. G. FernÃ¡ndez-Trincado, Vinicius M. Placco, Olga Zamora, Carlos Allende Prieto, D. A. GarcÃa-HernÃ¡ndez, Paul Harding, Inese Ivans, Richard Lane, Christian Nitschelm, Alexandre Roman-Lopes,, Jennifer Sobeck
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/866/1/42
The R -Process Alliance: A Comprehensive Abundance Analysis of HD 222925, a Metal-poor Star with an Extreme R -process Enhancement of [Eu/H] = −0.14
- Volume 13, Issue 40 - article #13
- Ian U. Roederer, Charli M. Sakari, Vinicius M. Placco, Timothy C. Beers, Rana Ezzeddine, Anna Frebel,, Terese T. Hansen
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/865/2/129
The R-Process Alliance: First Release from the Northern Search for r-Process Enhanced Metal-Poor Stars in the Galactic Halo. (arXiv:1809.09156v1 [astro-ph.SR])
- Volume 13, Issue 39 - article #7
- Charli M. Sakari, Vinicius M. Placco, Elizabeth M. Farrell, Ian U. Roederer, George Wallerstein, Timothy C. Beers, Rana Ezzeddine, Anna Frebel, Terese Hansen, Erika M. Holmbeck, Christopher Sneden, Kim A. Venn, Christopher Evan Davis, Gal Matijevic, Rosemary F.G. Wyse, Joss Bland-Hawthorn, Cristina Chiappini, Kenneth C. Freeman, Brad K. Gibson, Eva K. Grebel, Amina Helmi, Georges Kordopatis, Andrea Kunder, Julio Navarro, Warren Reid, George Seabroke, Matthias Steinmetz, Fred Watson
- http://arxiv.org/abs/1809.09156
The R-Process Alliance: A Comprehensive Abundance Analysis of HD 222925, a Metal-Poor Star with an Extreme R-Process Enhancement of [Eu/H] = -0.14. (arXiv:1808.09469v1 [astro-ph.SR])
- Volume 13, Issue 35 - article #9
- Ian U. Roederer (U. Michigan, JINA-CEE), Charli M. Sakari (U. Washington), Vinicius M. Placco (U. Notre Dame, JINA-CEE), Timothy C. Beers (U. Notre Dame, JINA-CEE), Rana Ezzeddine (MIT, JINA-CEE), Anna Frebel (MIT, JINA-CEE), Terese T. Hansen (Carnegie Observatories)
- http://arxiv.org/abs/1808.09469
The R -Process Alliance: Chemical Abundances for a Trio of r -process-enhanced Stars—One Strong, One Moderate, and One Mild
- Volume 13, Issue 35 - article #15
- Madelyn Cain, Anna Frebel, Maude Gull, Alexander P. Ji, Vinicius M. Placco, Timothy C. Beers, Jorge MelÃ©ndez, Rana Ezzeddine, Andrew R. Casey, Terese T. Hansen, Ian U. Roederer,, Charli Sakari
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/864/1/43
The R -Process Alliance: Discovery of the First Metal-poor Star with a Combined r - and s -process Element Signature
- Volume 13, Issue 32 - article #13
- Maude Gull, Anna Frebel, Madelyn G. Cain, Vinicius M. Placco, Alexander P. Ji, Carlo Abate, Rana Ezzeddine, Amanda I. Karakas, Terese T. Hansen, Charli Sakari, Erika M. Holmbeck, Rafael M. Santucci, Andrew R. Casey,, Timothy C. Beers
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/862/2/174
Galactic Archeology with the AEGIS Survey: The Evolution of Carbon and Iron in the Galactic Halo
- Volume 13, Issue 29 - article #20
- Jinmi Yoon, Timothy C. Beers, Sarah Dietz, Young Sun Lee, Vinicius M. Placco, Gary Da Costa, Stefan Keller, Christopher I. Owen,, Mahavir Sharma
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/861/2/146
The R-Process Alliance: Chemical Abundances for a Trio of R-Process-Enhanced Stars -- One Strong, One Moderate, One Mild. (arXiv:1807.03734v1 [astro-ph.SR])
- Volume 13, Issue 28 - article #13
- Madelyn Cain (MIT), Anna Frebel (MIT), Maude Gull (MIT), Alexander P. Ji (Carngie), Vinicius M. Placco (Notre Dame), Timothy C. Beers (Notre Dame), Jorge Melendez (Sao Paulo), Rana Ezzeddine (MIT, JINA), Andrew R. Casey (Monash), Terese T. Hansen (Carnegie), Ian U. Roederer (U Michigan), Charli Sakari (U Washington)
- http://arxiv.org/abs/1807.03734
Galactic Archeology with the AEGIS Survey: The Evolution of Carbon and Iron in the Galactic Halo. (arXiv:1806.04738v1 [astro-ph.SR])
- Volume 13, Issue 24 - article #4
- Jinmi Yoon, Timothy C. Beers, Sarah Dietz, Young Sun Lee, Vinicius M. Placco, Gary Da Costa, Stefan Keller, Christopher I. Owen, Mahavir Sharma
- http://arxiv.org/abs/1806.04738
The R-Process Alliance: Discovery of the first metal-poor star with a combined r- and s-process element signature. (arXiv:1806.00645v1 [astro-ph.SR])
- Volume 13, Issue 23 - article #5
- Maude Gull (MIT), Anna Frebel (MIT, JINA), Madelyn G. Cain (MIT), Vinicius M. Placco (Notre Dame, JINA), Alexander P. Ji (carnegie), Carlo Abate (Bonn), Rana Ezzeddine (JINA, MIT) Amanda I. Karakas (Monash), Terese T. Hansen (Carnegie), Charli Sakari (UW), Erika M. Holmbeck (Notre Dame, JINA), Rafael M. Santucci (UGoias), Andrew R. Casey (Monash), Timothy C. Beers (Notre Dame, JINA)
- http://arxiv.org/abs/1806.00645
The R -Process Alliance: 2MASS J09544277+5246414, the Most Actinide-enhanced R -II Star Known
- Volume 13, Issue 23 - article #7
- Erika M. Holmbeck, Timothy C. Beers, Ian U. Roederer, Vinicius M. Placco, Terese T. Hansen, Charli M. Sakari, Christopher Sneden, Chao Liu, Young Sun Lee, John J. Cowan,, Anna Frebel
- The Astrophysical Journal Letters
- http://iopscience.iop.org/2041-8205/859/2/L24
The R-Process Alliance: 2MASS J09544277+5246414, the Most Actinide-Enhanced R-II Star Known. (arXiv:1805.11925v1 [astro-ph.SR])
- Volume 13, Issue 22 - article #7
- Erika M. Holmbeck, Timothy C. Beers, Ian U. Roederer, Vinicius M. Placco, Terese T. Hansen, Charli M. Sakari, Christopher Sneden, Chao Liu, Young Sun Lee, John J. Cowan, Anna Frebel
- http://arxiv.org/abs/1805.11925
Spectroscopic Validation of Low-metallicity Stars from RAVE
- Volume 13, Issue 22 - article #9
- Vinicius M. Placco, Timothy C. Beers, Rafael M. Santucci, Julio ChanamÃ©, MarÃa Paz SepÃºlveda, Johanna Coronado, Sean D. Points, Catherine C. Kaleida, Silvia Rossi, Georges Kordopatis, Young Sun Lee, Gal MatijeviÄ, Anna Frebel, Terese T. Hansen, Erika M. Holmbeck, Kaitlin C. Rasmussen, Ian U. Roederer, Charli M. Sakari,, Devin D. Whitten
- The Astronomical Journal
- http://iopscience.iop.org/1538-3881/155/6/256
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
Spectroscopic Validation of Low-Metallicity Stars from RAVE. (arXiv:1805.00608v1 [astro-ph.SR])
- Volume 13, Issue 18 - article #16
- Vinicius M. Placco, Timothy C. Beers, Rafael M. Santucci, Julio Chaname, Maria Paz Sepulveda, Johanna Coronado, Sean D. Points, Catherine C. Kaleida, Silvia Rossi, Georges Kordopatis, Young Sun Lee, Gal Matijevic, Anna Frebel, Terese T. Hansen, Erika M. Holmbeck, Kaitlin C. Rasmussen, Ian U. Roederer, Charli M. Sakari, Devin D. Whitten
- http://arxiv.org/abs/1805.00608
The Origin of the 300 km s$^{-1}$ Stream Near Segue 1. (arXiv:1804.08622v1 [astro-ph.GA])
- Volume 13, Issue 17 - article #20
- Sal Wanying Fu, Joshua D. Simon, Matthew Shetrone, Jo Bovy, J. G. Fernández-Trincado, Vinicius M. Placco, Olga Zamora, Carlos Allende Prieto, D. A. García-Hernández, Paul Harding, Inese Ivans, Richard Lane, Christian Nitschelm, Alexandre Roman-Lopes, Jennifer Sobeck
- http://arxiv.org/abs/1804.08622
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
The r -process Pattern of a Bright, Highly r -process-enhanced Metal-poor Halo Star at [Fe/H] ∼ −2
- Volume 13, Issue 7 - article #18
- Charli M. Sakari, Vinicius M. Placco, Terese Hansen, Erika M. Holmbeck, Timothy C. Beers, Anna Frebel, Ian U. Roederer, Kim A. Venn, George Wallerstein, Christopher Evan Davis, Elizabeth M. Farrell,, David Yong
- The Astrophysical Journal Letters
- http://iopscience.iop.org/2041-8205/854/2/L20
APOGEE Chemical Abundances of the Sagittarius Dwarf Galaxy
- Volume 12, Issue 34 - article #18
- Sten Hasselquist, Matthew Shetrone, Verne Smith, Jon Holtzman, Andrew McWilliam, J. G. FernÃ¡ndez-Trincado, Timothy C. Beers, Steven R. Majewski, David L. Nidever, Baitian Tang, Patricia B. Tissera, Emma FernÃ¡ndez Alvar, Carlos Allende Prieto, Andres Almeida, Borja Anguiano, Giuseppina Battaglia, Leticia Carigi, Gloria Delgado Inglada, Peter Frinchaboy, D. A. GarcÃa-HernÃ¡ndez, Doug Geisler, Dante Minniti, Vinicius M. Placco, Mathias Schultheis, Jennifer Sobeck,, Sandro Villanova
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/845/2/162
RAVE J203843.2–002333: The First Highly R-process-enhanced Star Identified in the RAVE Survey
- Volume 12, Issue 29 - article #21
- Vinicius M. Placco, Erika M. Holmbeck, Anna Frebel, Timothy C. Beers, Rebecca A. Surman, Alexander P. Ji, Rana Ezzeddine, Sean D. Points, Catherine C. Kaleida, Terese T. Hansen, Charli M. Sakari,, Andrew R. Casey
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/844/1/18
APOGEE Chemical Abundances of the Sagittarius Dwarf Galaxy. (arXiv:1707.03456v1 [astro-ph.GA])
- Volume 12, 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
RAVE J203843.2-002333: The first highly r-process-enhanced star identified in the RAVE survey. (arXiv:1706.02934v1 [astro-ph.SR])
- Volume 12, Issue 24 - article #10
- Vinicius M. Placco, Erika M. Holmbeck, Anna Frebel, Timothy C. Beers, Rebecca A. Surman, Alexander P. Ji, Rana Ezzeddine, Sean D. Points, Catherine C. Kaleida, Terese T. Hansen, Charli M. Sakari, Andrew R. Casey
- http://arxiv.org/abs/1706.02934
Bright Metal-Poor Stars from the Hamburg/ESO Survey. II. A Chemodynamical Analysis
- Volume 12, Issue 3 - article #7
- Timothy C. Beers, Vinicius M. Placco, Daniela Carollo, Silvia Rossi, Young Sun Lee, Anna Frebel, John E. Norris, Sarah Dietz,, Thomas Masseron
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/835/1/81
Identification of Neodymium in the Apogee H-Band Spectra
- Volume 11, Issue 50 - article #17
- Sten Hasselquist, Matthew Shetrone, Katia Cunha, Verne V. Smith, Jon Holtzman, J. E. Lawler, Carlos Allende Prieto, Timothy C. Beers, Drew Chojnowski, J. G. FernÃ¡ndez-Trincado, D. A. GarcÃa-HernÃ¡ndez, Fred R. Hearty, Steven R. Majewski, C. B. Pereira, Vinicius M. Placco, Sandro Villanova,, Olga Zamora
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/833/1/81
OBSERVATIONAL CONSTRAINTS ON FIRST-STAR NUCLEOSYNTHESIS. I. EVIDENCE FOR MULTIPLE PROGENITORS OF CEMP-NO STARS
- Volume 11, Issue 50 - article #18
- Jinmi Yoon, Timothy C. Beers, Vinicius M. Placco, Kaitlin C. Rasmussen, Daniela Carollo, Siyu He, Terese T. Hansen, Ian U. Roederer,, Jeff Zeanah
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/833/1/20
OBSERVATIONAL CONSTRAINTS ON FIRST-STAR NUCLEOSYNTHESIS. II. SPECTROSCOPY OF AN ULTRA METAL-POOR CEMP-NO STAR
- Volume 11, Issue 50 - article #19
- Vinicius M. Placco, Anna Frebel, Timothy C. Beers, Jinmi Yoon, Anirudh Chiti, Alexander Heger, Conrad Chan, Andrew R. Casey,, Norbert Christlieb
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/833/1/21
Bright Metal-Poor Stars from the Hamburg/ESO Survey. II. A Chemodynamical Analysis. (arXiv:1611.03762v1 [astro-ph.SR])
- Volume 11, Issue 47 - article #2
- Timothy C. Beers, Vinicius M. Placco, Daniela Carollo, Silvia Rossi, Anna Frebel, John E. Norris, Sarah Dietz, Thomas Masseron
- http://arxiv.org/abs/1611.03762
G64-12 and G64-37 Are Carbon-enhanced Metal-poor Stars
- Volume 11, Issue 39 - article #22
- Vinicius M. Placco, Timothy C. Beers, Henrique Reggiani,, Jorge MelÃ©ndez
- The Astrophysical Journal Letters
- http://iopscience.iop.org/2041-8205/829/2/L24
G64-12 and G64-37 are Carbon-Enhanced Metal-Poor Stars. (arXiv:1609.00679v1 [astro-ph.SR])
- Volume 11, Issue 37 - article #9
- Vinicius M. Placco, Timothy C. Beers, Henrique Reggiani, Jorge Melendez
- http://arxiv.org/abs/1609.00679
Observational Constraints on First-Star Nucleosynthesis. II. Spectroscopy of an Ultra Metal-Poor CEMP-no Star. (arXiv:1609.02134v1 [astro-ph.SR])
- Volume 11, Issue 37 - article #12
- Vinicius M. Placco, Anna Frebel, Timothy C. Beers, Jinmi Yoon, Anirudh Chiti, Alexander Heger, Conrad Chan, Andrew R. Casey, Norbert Christlieb
- http://arxiv.org/abs/1609.02134
Observational Constraints on First-Star Nucleosynthesis. I. Evidence for Multiple Progenitors of CEMP-no Stars. (arXiv:1607.06336v1 [astro-ph.SR])
- Volume 11, Issue 30 - article #6
- Jinmi Yoon, Timothy C. Beers, Vinicius M. Placco, Kaitlin C. Rasmussen, Daniela Carollo, Siyu He, Terese T. Hansen, Ian U. Roederer
- http://arxiv.org/abs/1607.06336
2MASS J18082002-5104378: The brightest (V=11.9) ultra metal-poor star
- Volume 11, Issue 3 - article #1
- Jorge Melendez, Vinicius M. Placco, Marcelo Tucci-Maia, Ivan Ramirez, Ting S. Li, Gabriel Perez
- arXiv.org - Astrophysics - Volume: 2016, Issue: 15 Jan
- arXiv:1601.03462 [pdf, ps, other]
The Chemical Abundances of Stars in the Halo (CASH) Project. III. A New Classification Scheme for Carbon-enhanced Metal-poor Stars with s-process Element Enhancement
- Volume 10, Issue 44 - article #26
- Julie K. Hollek, Anna Frebel, Vinicius M. Placco, Amanda I. Karakas, Matthew Shetrone, Christopher Sneden, and Norbert Christlieb
- The Astrophysical Journal - Volume: 814, Issue: 2
- View article PDF (1.65 MB)
Chronography of the Milky Way's Halo System with Field Blue Horizontal-branch Stars
- Volume 10, Issue 42 - article #14
- Rafael M. Santucci, Timothy C. Beers, Vinicius M. Placco, Daniela Carollo, Silvia Rossi, Young Sun Lee, Pavel Denissenkov, Jason Tumlinson, and Patricia B. Tissera
- The Astrophysical Journal Letters - Volume: 813, Issue: 1
- View article PDF (1.30 MB)
The Fractions of Inner- and Outer-halo Stars in the Local Volume
- Volume 10, Issue 42 - article #17
- Deokkeun An, Timothy C. Beers, Rafael M. Santucci, Daniela Carollo, Vinicius M. Placco, Young Sun Lee, and Silvia Rossi
- The Astrophysical Journal Letters - Volume: 813, Issue: 2
- View article PDF (542 KB)
The Chemical Abundances of Stars in the Halo (CASH) Project. III. A New Classification Scheme for Carbon-Enhanced Metal-poor Stars with S-process Element Enhancement
- Volume 10, Issue 40 - article #16
- Julie K. Hollek (UT/JINA), Anna Frebel (MIT/JINA), Vinicius M. Placco (U Notre Dame/JINA), Amanda I. Karakas (ANU), Matthew Shetrone (UT/McDonald Obs.), Christopher Sneden (UT), Norbert Christlieb (Heidelberg)
- arXiv.org - Astrophysics - Volume: 2015, Issue: 30 Oct
- arXiv:1510.06825 [pdf, ps, other]
The Fractions of Inner- and Outer-Halo Stars in the Local Volume
- Volume 10, Issue 40 - article #18
- Deokkeun An, Timothy C. Beers, Rafael M. Santucci, Daniela Carollo, Vinicius M. Placco, Young Sun Lee, Silvia Rossi
- arXiv.org - Astrophysics - Volume: 2015, Issue: 30 Oct
- arXiv:1510.07630 [pdf, ps, other]
Hubble Space Telescope Near-Ultraviolet Spectroscopy of Bright CEMP-s Stars
- Volume 10, Issue 31 - article #4
- Vinicius M. Placco, Timothy C. Beers, Inese I. Ivans, Dan Filler, Julie A. Imig, Ian U. Roederer, Carlo Abate, Terese Hansen, John J. Cowan, Anna Frebel, James E. Lawler, Hendrik Schatz, Christopher Sneden, Jennifer S. Sobeck, Wako Aoki, Verne V. Smith, Michael Bolte
- arXiv.org - Astrophysics - Volume: 2015, Issue: 28 Aug
- arXiv:1508.05872 [pdf, ps, other]
SD 1313-0019 -- Another second-generation star with [Fe/H] = -5.0, observed with the Magellan Telescope
- Volume 10, Issue 25 - article #14
- Anna Frebel (MIT), Anirudh Chiti (MIT), Alexander P. Ji (MIT), Heather R. Jacobson (MIT), Vinicius M. Placco (Notre Dame U/JINA)
- arXiv.org - Astrophysics - Volume: 2015, Issue: 10 Jul
- arXiv:1507.01973 [pdf, ps, other]
Metal-Poor Stars Observed with the Magellan Telescope. III. New Extremely and Ultra Metal-Poor Stars from SDSS/SEGUE and Insights on the Formation of Ultra Metal-Poor Stars
- Volume 10, Issue 25 - article #20
- Vinicius M. Placco, Anna Frebel, Young Sun Lee, Heather R. Jacobson, Timothy C. Beers, Jose M. Pena, Conrad Chan, Alexander Heger
- arXiv.org - Astrophysics - Volume: 2015, Issue: 17 Jul
- arXiv:1507.03656 [pdf, ps, other]
The Frequency of Field Blue-Straggler Stars in the Thick Disk and Halo System of the Galaxy
- Volume 10, Issue 10 - article #26
- Rafael M. Santucci, Vinicius M. Placco, Silvia Rossi, Timothy C. Beers, Henrique M. Reggiani, Young Sun Lee, Xiang-Xiang Xue, and Daniela Carollo
- The Astrophysical Journal - Volume: 801, Issue: 2
- View article PDF (2.55 MB)
The Frequency of Field Blue-Straggler Stars in the Thick Disk and Halo System of the Galaxy
- Volume 10, Issue 2 - article #8
- Rafael M. Santucci, Vinicius M. Placco, Silvia Rossi, Timothy C. Beers, Henrique M. Reggiani, Young Sun Lee, Xiang-Xiang Xue, Daniela Carollo
- arXiv.org - Astrophysics - Volume: 2015, Issue: 16 Jan
- arXiv:1501.03559 [pdf, ps, other]
Carbon-enhanced Metal-poor Star Frequencies in the Galaxy: Corrections for the Effect of Evolutionary Status on Carbon Abundances
- Volume 9, Issue 25 - article #54
- Vinicius M. Placco, Anna Frebel, Timothy C. Beers, and Richard J. Stancliffe
- The Astrophysical Journal - Volume: 797, Issue: 1
- View article PDF (1.10 MB)
Carbon-Enhanced Metal-Poor Star Frequencies in the Galaxy: Corrections for the Effect of Evolutionary Status on Carbon Abundances
- Volume 9, Issue 23 - article #1
- Vinicius M. Placco, Anna Frebel, Timothy C. Beers, Richard J. Stancliffe
- arXiv.org - Astrophysics - Volume: 2014, Issue: 10 Oct
- arXiv:1410.2223 [pdf, ps, other]
Population Studies. XIII. A New Analysis of the Bidelman-MacConnell "Weak-metal" Stars—Confirmation of Metal-poor Stars in the Thick Disk of the Galaxy
- Volume 9, Issue 23 - article #65
- Timothy C. Beers, John E. Norris, Vinicius M. Placco, Young Sun Lee, Silvia Rossi, Daniela Carollo, and Thomas Masseron
- The Astrophysical Journal - Volume: 794, Issue: 1
- View article PDF (871 KB)
Population Studies. XIII. A New Analysis of the Bidelman-MacConnell "Weak-Metal" Stars - Confirmation of Metal-Poor Stars in the Thick Disk of the Galaxy
- Volume 9, Issue 21 - article #14
- Timothy C. Beers, John E. Norris, Vinicius M. Placco, Young Sun Lee, Silvia Rossi, Daniela Carollo, Thomas Masseron
- arXiv.org - Astrophysics - Volume: 2014, Issue: 15 Aug
- arXiv:1408.3165 [pdf, ps, other]
Carbon-enhanced Metal-poor Stars: CEMP-s and CEMP-no Subclasses in the Halo System of the Milky Way
- Volume 9, Issue 21 - article #64
- Daniela Carollo, Ken Freeman, Timothy C. Beers, Vinicius M. Placco, Jason Tumlinson, and Sarah L. Martell
- The Astrophysical Journal - Volume: 788, Issue: 2
- View article PDF (774 KB)
Hubble Space Telescope Near-ultraviolet Spectroscopy of the Bright CEMP-no Star BD+44°493
- Volume 9, Issue 21 - article #73
- Vinicius M. Placco, Timothy C. Beers, Ian U. Roederer, John J. Cowan, Anna Frebel, Dan Filler, Inese I. Ivans, James E. Lawler, Hendrik Schatz, Christopher Sneden, Jennifer S. Sobeck, Wako Aoki, and Verne V. Smith
- The Astrophysical Journal - Volume: 790, Issue: 1
- View article PDF (835 KB)
Seven New Carbon-enhanced Metal-poor RR Lyrae Stars
- Volume 9, Issue 20 - article #181
- Catherine R. Kennedy, Richard J. Stancliffe, Charles Kuehn, Timothy C. Beers, T. D. Kinman, Vinicius M. Placco, Henrique Reggiani, Silvia Rossi, and Young Sun Lee
- The Astrophysical Journal - Volume: 787, Issue: 1
- View article PDF (709 KB)
Seven New Carbon-Enhanced Metal-Poor RR Lyrae Stars
- Volume 9, Issue 14 - article #11
- Catherine R. Kennedy, Richard J. Stancliffe, Charles Kuehn, Timothy C. Beers, T. D. Kinman, Vinicius M. Placco, Henrique Reggiani, Silvia Rossi, Young Sun Lee
- arXiv.org - Astrophysics - Volume: 2014, Issue: 4 Apr
- arXiv:1404.0120 [pdf, ps, other]
Metal-poor Stars Observed with the Magellan Telescope. II. Discovery of Four Stars with [Fe/H] ≤ –3.5
- Volume 9, Issue 4 - article #47
- Vinicius M. Placco, Anna Frebel, Timothy C. Beers, Norbert Christlieb, Young Sun Lee, Catherine R. Kennedy, Silvia Rossi, and Rafael M. Santucci
- The Astrophysical Journal - Volume: 781, Issue: 1
- View article PDF (1.00 MB)
Metal-Poor Stars Observed with the Magellan Telescope II. Discovery of Four Stars with [Fe/H] < -3.5
- Volume 8, Issue 48 - article #6
- Vinicius M. Placco, Anna Frebel, Timothy C. Beers, Norbert Christlieb, Young Sun Lee, Catherine R. Kennedy, Silvia Rossi, Rafael M. Santucci
- arXiv.org - Astrophysics - Volume: 2013, Issue: 2 Dec
- arXiv:1311.5855 [pdf, ps, other]
Metal-Poor Stars Observed with the Magellan Telescope II. Discovery of Four Stars with [Fe/H] < -3.5
- Volume 8, Issue 48 - article #15
- Vinicius M. Placco, Anna Frebel, Timothy C. Beers, Norbert Christlieb, Young Sun Lee, Catherine R. Kennedy, Silvia Rossi, Rafael M. Santucci
- arXiv.org - Astrophysics - Volume: 2013, Issue: 25 Nov
- arXiv:1311.5855 [pdf, ps, other]
Carbon-enhanced Metal-poor Stars in SDSS/SEGUE. I. Carbon Abundance Estimation and Frequency of CEMP Stars
- Volume 8, Issue 42 - article #2
- Young Sun Lee, Timothy C. Beers, Thomas Masseron, Bertrand Plez, Constance M. Rockosi, Jennifer Sobeck, Brian Yanny, Sara Lucatello, Thirupathi Sivarani, Vinicius M. Placco, Daniela Carollo
- arXiv.org - Astrophysics - Volume: 2013, Issue: 18 Oct
- arXiv:1310.3276 [pdf, ps, other]
Metal-poor Stars Observed with the Magellan Telescope. I. Constraints on Progenitor Mass and Metallicity of AGB Stars Undergoing s-process Nucleosynthesis
- Volume 8, Issue 23 - article #23
- Vinicius M. Placco, Anna Frebel, Timothy C. Beers, Amanda I. Karakas, Catherine R. Kennedy, Silvia Rossi, Norbert Christlieb, and Richard J. Stancliffe
- The Astrophysical Journal - Volume: 770, Issue: 2
- Abstract References Full text PDF (2.07 MB) Enhanced article HTML
Metal-Poor Stars Observed with the Magellan Telescope I. Constraints on Progenitor Mass and Metallicity of AGB Stars Undergoing s-Process Nucleosynthesis
- Volume 8, Issue 18 - article #7
- Vinicius M. Placco, Anna Frebel, Timothy C. Beers, Amanda I. Karakas, Catherine R. Kennedy, Silvia Rossi, Norbert Christlieb, Richard J. Stancliffe
- arXiv.org - Astrophysics - Volume: 2013, Issue: 3 May
- arXiv:1304.7869 [pdf, ps, other]
Searches for Metal-Poor Stars from the Hamburg/ESO Survey using the CH G-band
- Volume 6, Issue 38 - article #15
- Vinicius M. Placco, Catherine R. Kennedy, Timothy C. Beers, Norbert Christlieb, Silvia Rossi, Thirupathi Sivarani, Young Sun Lee, Dieter Reimers, Lutz Wisotzki
- arXiv.org - Astrophysics - Volume: 2011, Issue: 23 Sep
- arXiv:1109.3993 [pdf, ps, other]
[O/Fe] Estimates for Carbon-enhanced Metal-poor Stars from Near-infrared Spectroscopy
- Volume 6, Issue 7 - article #19
- Catherine R. Kennedy, Thirupathi Sivarani, Timothy C. Beers, Young Sun Lee, Vinicius M. Placco, Silvia Rossi, Norbert Christlieb, Falk Herwig and Bertrand Plez
- Astronomical Journal - Volume: 141, Issue: 3
- doi: 10.1088/0004-6256/141/3/102 Tag this article
[O/Fe] Estimates for Carbon-Enhanced Metal-Poor Stars from Near-IR Spectroscopy
- Volume 6, Issue 2 - article #13
- Catherine R. Kennedy, Thirupathi Sivarani, Timothy C. Beers, Young Sun Lee, Vinicius M. Placco, Silvia Rossi, Norbert Christlieb, Falk Herwig, Bertrand Plez
- arXiv.org - Astrophysics - Volume: 2011, Issue: 14 Jan
- arXiv:1101.2260 [pdf, ps, other]
A Search for Unrecognized Carbon-Enhanced Metal-Poor Stars in the Galaxy
- Volume 5, Issue 7 - article #14
- <em >Vinicius M. Placco, Catherine R. Kennedy, Silvia Rossi, Timothy C. Beers, Young Sun Lee, Norbert Christlieb, Thirupathi Sivarani, Dieter Reimers, and Lutz Wisotzki</em&gt,
- Astronomical Journal - Volume: 139, Issue: 3
- Abstract | References
A Search for Unrecognized Carbon-Enhanced Metal-Poor Stars in the Galaxy
- Volume 5, Issue 3 - article #1
- Vinicius M. Placco, Catherine R. Kennedy, Silvia Rossi, Timothy C. Beers, Young Sun Lee, Norbert Christlieb, Thirupathi Sivarani, Dieter Reimers, Lutz Wisotzki
- arXiv.org - Astrophysics - Volume: 2010, Issue: 15 Jan
- arXiv:1001.2512 [ps, pdf, other]

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