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Results 1 - 36 of 36

The $R$-process Alliance: Enrichment of $R$-process Elements in a Simulated Milky Way-like Galaxy
- Virtual Journal - Volume 22, Issue 42 - article #6
- Yutaka Hirai, Timothy C. Beers, Young Sun Lee, Shinya Wanajo, Ian U. Roederer, Masaomi Tanaka, Masashi Chiba, Takayuki R. Saitoh, Vinicius M. Placco, Terese T. Hansen, Rana Ezzeddine, Anna Frebel, Erika M. Holmbeck, Charli M. Sakari
- https://arxiv.org/abs/2410.11943
The R-process Alliance: Fifth Data Release from the Search for R-process-enhanced Metal-poor Stars in the Galactic Halo with the GTC
- Virtual Journal - Volume 22, Issue 40 - article #21
- Avrajit Bandyopadhyay, Rana Ezzeddine, Carlos Allende Prieto, Nima Aria, Shivani P. Shah, Timothy C. Beers, Anna Frebel, Terese T. Hansen, Erika M. Holmbeck, Vinicius M. Placco
- The Astrophysical Journal Supplement
- https://doi.org/10.3847/1538-4365/ad6f0f
Discovery of a Metal-Poor Red Giant Star with the Highest Ultra-Lithium Enhancement
- Virtual Journal - Volume 22, Issue 33 - article #5
- Jeremy Kowkabany, Rana Ezzeddine, Corinne Charbonnel, Ian U. Roederer, Ella Xi Wang, Yangyang Li, Zoe Hackshaw, Timothy C. Beers, Anna Frebel, Terese T. Hansen, Erika Holmbeck, Vinicius M. Placco, Charli M. Sakari
- https://arxiv.org/abs/2209.02184
The R-Process Alliance: 2MASS J22132050–5137385, the Star with the Highest-known r-process Enhancement at [Eu/Fe] = +2.45
- Virtual Journal - Volume 22, Issue 33 - article #27
- Ian U. Roederer, Timothy C. Beers, Kohei Hattori, Vinicius M. Placco, Terese T. Hansen, Rana Ezzeddine, Anna Frebel, Erika M. Holmbeck, Charli M. Sakari
- The Astrophysical Journal
- https://doi.org/10.3847/1538-4357/ad57bf
The $R$-Process Alliance: Fifth Data Release from the Search for $R$-Process-Enhanced Metal-poor Stars in the Galactic Halo with the GTC
- Virtual Journal - Volume 22, Issue 32 - article #7
- Avrajit Bandyopadhyay, Rana Ezzeddine, Carlos Allende Prieto, Nima Aria, Shivani P. Shah, Timothy C. Beers, Anna Frebel, Terese T. Hansen, Erika M. Holmbeck, Vinicius M. Placco, Ian U. Roederer, Charli M. Sakari
- https://arxiv.org/abs/2408.03731
The R-Process Alliance: 2MASS J22132050-5137385, the Star with the Highest-known r-process Enhancement at [Eu/Fe] = +2.45
- Virtual Journal - Volume 22, Issue 23 - article #15
- Ian U. Roederer, Timothy C. Beers, Kohei Hattori, Vinicius M. Placco, Terese T. Hansen, Rana Ezzeddine, Anna Frebel, Erika M. Holmbeck, Charli M. Sakari
- https://arxiv.org/abs/2406.02691
Element abundance patterns in stars indicate fission of nuclei heavier than uranium. (arXiv:2312.06844v1 [astro-ph.SR])
- Virtual Journal - Volume 21, Issue 48 - article #9
- Ian U. Roederer, Nicole Vassh, Erika M. Holmbeck, Matthew R. Mumpower, Rebecca Surman, John J. Cowan, Timothy C. Beers, Rana Ezzeddine, Anna Frebel, Terese T. Hansen, Vinicius M. Placco, Charli M. Sakari
- http://arxiv.org/abs/2312.06844
Uranium Abundances and Ages of r-process Enhanced Stars with Novel U ii Lines
- Virtual Journal - Volume 21, Issue 20 - article #39
- Shivani P. Shah, Rana Ezzeddine, Alexander P. Ji, Terese T. Hansen, Ian U. Roederer, MÃ¡rcio Catelan, Zoe Hackshaw, Erika M. Holmbeck, Timothy C. Beers, Rebecca Surman
- The Astrophysical Journal
- https://doi.org/10.3847/1538-4357/acb8af
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
The R-Process Alliance: Abundance Universality among Some Elements at and between the First and Second R-Process Peaks. (arXiv:2210.15105v1 [astro-ph.SR])
- Virtual Journal - Volume 20, Issue 42 - article #14
- Ian U. Roederer, John J. Cowan, Marco Pignatari, Timothy C. Beers, Elizabeth A. Den Hartog, Rana Ezzeddine, Anna Frebel, Terese T. Hansen, Erika M. Holmbeck, Matthew R. Mumpower, Vinicius M. Placco, Charli M. Sakari, Rebecca Surman, Nicole Vassh
- http://arxiv.org/abs/2210.15105
Discovery of an Ultra Lithium-rich Metal-Poor Red Giant star. (arXiv:2209.02184v1 [astro-ph.SR])
- Virtual Journal - Volume 20, Issue 35 - article #2
- Jeremy Kowkabany, Rana Ezzeddine, Corinne Charbonnel, Ian U. Roederer, Yangyang Li, Zoe Hackshaw, Timothy C. Beers, Anna Frebel, Terese T. Hansen, Erika Holmbeck, Vinicius M. Placco, Charli M. Sakari
- http://arxiv.org/abs/2209.02184
The R-Process Alliance: Abundance Universality among Some Elements at and between the First and Second R-Process Peaks
- Virtual Journal - Volume 20, Issue 34 - article #16
- Ian U. Roederer, John J. Cowan, Marco Pignatari, Timothy C. Beers, Elizabeth A. Den Hartog, Rana Ezzeddine, Anna Frebel, Terese T. Hansen, Erika M. Holmbeck, Matthew R. Mumpower
- The Astrophysical Journal
- https://doi.org/10.3847/1538-4357/ac85bc
The emph{R}-Process Alliance: Chemo-Dynamically Tagged Groups II. An Extended Sample of Halo $r$-Process-Enhanced Stars. (arXiv:2208.09712v1 [astro-ph.GA])
- Virtual Journal - Volume 20, Issue 33 - article #7
- Derek Shank, Timothy C. Beers, Vinicius M. Placco, Dmitrii Gudin, Thomas Catapano, Erika M. Holmbeck, Rana Ezzeddine, Ian U. Roederer, Charli M. Sakari, Anna Frebel, Terese T. Hansen
- http://arxiv.org/abs/2208.09712
The R-process Alliance: A Nearly Complete R-process Abundance Template Derived from Ultraviolet Spectroscopy of the R-process-enhanced Metal-poor Star HD 222925
- Virtual Journal - Volume 20, Issue 24 - article #27
- Ian U. Roederer, James E. Lawler, Elizabeth A. Den Hartog, Vinicius M. Placco, Rebecca Surman, Timothy C. Beers, Rana Ezzeddine, Anna Frebel, Terese T. Hansen, Kohei Hattori
- The Astrophysical Journal Supplement
- https://doi.org/10.3847/1538-4365/ac5cbc
The Southern Stellar Stream Spectroscopic Survey ( S 5 ): Chemical Abundances of Seven Stellar Streams
- Virtual Journal - Volume 18, Issue 39 - article #7
- Alexander P. Ji, Ting S. Li, Terese T. Hansen, Andrew R. Casey, Sergey E. Koposov, Andrew B. Pace, Dougal Mackey, Geraint F. Lewis, Jeffrey D. Simpson, Joss Bland-Hawthorn, Lara R. Cullinane, Gary. S. Da Costa, Kohei Hattori, Sarah L. Martell, Kyler Kuehn, Denis Erkal, Nora Shipp, Zhen Wan,, Daniel B. Zucker
- The Astronomical Journal
- http://iopscience.iop.org/1538-3881/160/4/181
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
- Virtual Journal - Volume 18, Issue 30 - article #19
- 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
- Virtual Journal - Volume 18, Issue 28 - article #19
- 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])
- Virtual Journal - Volume 18, 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])
- Virtual Journal - Volume 18, Issue 25 - article #9
- 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])
- Virtual Journal - Volume 18, Issue 25 - article #10
- 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 lanthanide fraction distribution in metal-poor stars: a test of neutron star mergers as the dominant r-process site. (arXiv:1905.01814v2 [astro-ph.HE] UPDATED)
- Virtual Journal - Volume 17, Issue 29 - article #6
- Alexander P. Ji (Carnegie), Maria R. Drout (Toronto), Terese T. Hansen (Texas A&M)
- http://arxiv.org/abs/1905.01814
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])
- Virtual Journal - Volume 17, 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
Chemical Abundance Signature of J0023+0307 -- A Second-Generation Main-Sequence Star with [Fe/H]<-6. (arXiv:1810.01228v1 [astro-ph.SR])
- Virtual Journal - Volume 16, Issue 40 - article #3
- Anna Frebel (MIT), Alexander P. Ji (Carnegie), Rana Ezzeddine (JINA, MIT), Terese T. Hansen (Carnegie), Anirudh Chiti (MIT), Ian B. Thompson (Carnegie), Thibault Merle (Brussels)
- http://arxiv.org/abs/1810.01228
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
- Virtual Journal - Volume 16, Issue 40 - article #27
- 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
Chemical Abundances in the Ultra-Faint Dwarf Galaxies Grus I and Triangulum II: Neutron-Capture Elements as a Defining Feature of the Faintest Dwarfs. (arXiv:1809.02182v1 [astro-ph.GA])
- Virtual Journal - Volume 16, Issue 37 - article #4
- Alexander P. Ji, Joshua D. Simon, Anna Frebel, Kim A. Venn, Terese T. Hansen
- http://arxiv.org/abs/1809.02182
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])
- Virtual Journal - Volume 16, Issue 35 - article #12
- 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
- Virtual Journal - Volume 16, Issue 35 - article #21
- 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
- Virtual Journal - Volume 16, Issue 32 - article #37
- 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
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])
- Virtual Journal - Volume 16, Issue 28 - article #24
- 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
The R -process Alliance: First Release from the Southern Search for R -process-enhanced Stars in the Galactic Halo
- Virtual Journal - Volume 16, Issue 19 - article #17
- 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])
- Virtual Journal - Volume 16, Issue 15 - article #12
- 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
Detailed chemical abundance analysis of the thick disk star cluster Gaia 1⋆⋆⋆
- Virtual Journal - Volume 16, Issue 4 - article #27
- Andreas Koch, Terese T. Hansen, Andrea Kunder
- Astronomy & Astrophysics
- http://feedproxy.google.com/~r/edp_aa/~3/BQ7Da1hfwpA/201731434
Detailed chemical abundance analysis of the thick disk star cluster Gaia 1. (arXiv:1709.04022v1 [astro-ph.GA])
- Virtual Journal - Volume 15, Issue 37 - article #3
- Andreas Koch, Terese T. Hansen, Andrea Kunder
- http://arxiv.org/abs/1709.04022
RAVE J203843.2–002333: The First Highly R-process-enhanced Star Identified in the RAVE Survey
- Virtual Journal - Volume 15, Issue 29 - article #15
- 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
OBSERVATIONAL CONSTRAINTS ON FIRST-STAR NUCLEOSYNTHESIS. I. EVIDENCE FOR MULTIPLE PROGENITORS OF CEMP-NO STARS
- Virtual Journal - Volume 14, Issue 50 - article #21
- 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. I. Evidence for Multiple Progenitors of CEMP-no Stars. (arXiv:1607.06336v1 [astro-ph.SR])
- Virtual Journal - Volume 14, Issue 30 - article #10
- 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

Results 1 - 36 of 36

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