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Results 1 - 80 of 80

Chemical Abundances in the Leiptr Stellar Stream: A Disrupted Ultra-faint Dwarf Galaxy?
- Volume 19, Issue 43 - article #3
- Kaia R. Atzberger, Sam A. Usman, Alexander P. Ji, Lara R. Cullinane, Denis Erkal, Terese T. Hansen, Geraint F. Lewis, Ting S. Li, Guilherme Limberg, Alice Luna, Sarah L. Martell, Madeleine McKenzie, Andrew B. Pace, Daniel B. Zucker
- https://arxiv.org/abs/2410.17312
Eridanus III and DELVE 1: Carbon-rich Primordial Star Clusters or the Smallest Dwarf Galaxies?
- Volume 19, Issue 42 - article #4
- Joshua D. Simon, Ting S. Li, Alexander P. Ji, Andrew B. Pace, Terese T. Hansen, William Cerny, Ivanna Escala, Sergey E. Koposov, Alex Drlica-Wagner, Sidney Mau, Evan N. Kirby
- https://arxiv.org/abs/2410.08276
The Rise of the r-process in the Gaia-Sausage/Enceladus Dwarf Galaxy
- Volume 19, Issue 42 - article #16
- Xiaowei Ou, Alexander P. Ji, Anna Frebel, Rohan P. Naidu, Guilherme Limberg
- The Astrophysical Journal
- https://doi.org/10.3847/1538-4357/ad6f9b
Where has all the $r$-process gone? Timescales for GRB-Kilonovae to Enrich their Host Galaxies
- Volume 19, Issue 40 - article #5
- Anya E. Nugent, Alexander P. Ji, Wen-fai Fong, Hilay Shah, Freeke van de Voort
- https://arxiv.org/abs/2410.00095
LAMOST J1010+2358 is not a Pair-Instability Supernova Relic
- Volume 19, Issue 18 - article #2
- Pierre N. Thibodeaux, Alexander P. Ji, William Cerny, Evan N. Kirby, Joshua D. Simon
- https://arxiv.org/abs/2404.17078
Stellar Metallicities from DECam $u$-band Photometry: A Study of Milky Way Ultra-Faint Dwarf Galaxies
- Volume 19, Issue 16 - article #8
- Yue Pan, Anirudh Chiti, Alex Drlica-Wagner, Alexander P. Ji, Ting S. Li, Guilherme Limberg, Douglas L. Tucker, Sahar Allam
- https://arxiv.org/abs/2404.08054
Extending the Chemical Reach of the H3 Survey: Detailed Abundances of the Dwarf-galaxy Stellar Stream Wukong/LMS-1
- Volume 19, Issue 15 - article #4
- Guilherme Limberg, Alexander P. Ji, Rohan P. Naidu, Anirudh Chiti, Silvia Rossi, Sam A. Usman, Yuan-Sen Ting, Dennis Zaritsky, Ana Bonaca, Lais Borbolato, Joshua S. Speagle, Vedant Chandra, Charlie Conroy
- https://arxiv.org/abs/2308.13702
200,000 Candidate Very Metal-poor Stars in Gaia DR3 XP Spectra
- Volume 19, Issue 10 - article #1
- Yupeng Yao, Alexander P. Ji, Sergey E. Koposov, Guilherme Limberg
- https://arxiv.org/abs/2303.17676
Spectacular Nucleosynthesis from Early Massive Stars
- Volume 19, Issue 6 - article #14
- Alexander P. Ji, Sanjana Curtis, Nicholas Storm, Vedant Chandra, Kevin C. Schlaufman, Keivan G. Stassun, Alexander Heger, Marco Pignatari, Adrian M. Price-Whelan, Maria Bergemann
- The Astrophysical Journal Letters
- https://doi.org/10.3847/2041-8213/ad19c4
The $R$-Process Alliance: Detailed Composition of an $R$-Process Enhanced Star with UV and Optical Spectroscopy. (arXiv:2401.12311v1 [astro-ph.SR])
- Volume 19, Issue 4 - article #9
- Shivani P. Shah, Rana Ezzeddine, Ian U. Roederer, Terese T. Hansen, Vinicius M. Placco, Timothy C. Beers, Anna Frebel, Alexander P. Ji, Erika Holmbeck, Jennifer Marshall, Charli M. Sakari
- http://arxiv.org/abs/2401.12311
Multiple Populations and a CH Star Found in the 300S Globular Cluster Stellar Stream. (arXiv:2401.02476v1 [astro-ph.GA])
- Volume 19, Issue 2 - article #2
- Sam A. Usman, Alexander P. Ji, Ting S. Li, Andrew B. Pace, Lara R. Cullinane, Gary S. Da Costa, Sergey E. Koposov, Geraint F. Lewis, Daniel B. Zucker, Vasily Belokurov, Joss Bland-Hawthorn, Peter S. Ferguson, Terese T. Hansen, Guilherme Limberg, Sarah L. Martell, Madeleine McKenzie, Joshua D. Simon
- http://arxiv.org/abs/2401.02476
Spectacular nucleosynthesis from early massive stars. (arXiv:2401.02484v1 [astro-ph.SR])
- Volume 19, Issue 2 - article #4
- Alexander P. Ji, Sanjana Curtis, Nicholas Storm, Vedant Chandra, Kevin C. Schlaufman, Keivan G. Stassun, Alexander Heger, Marco Pignatari, Adrian M. Price-Whelan, Maria Bergemann, Guy S. Stringfellow, Carla Frohlich, Henrique Reggiani, Erika M. Holmbeck, Jamie Tayar, Shivani P. Shah, Emily J. Griffith, Chervin F. P. Laporte, Andrew R. Casey, Keith Hawkins, Danny Horta, William Cerny, Pierre Thibodeaux, Sam A. Usman, Joao A. S. Amarante, Rachael L. Beaton, Phillip A. Cargile, Cristina Chiappini, Charlie Conroy, Jennifer A. Johnson, Juna A. Kollmeier, Haining Li, Sarah Loebman, Georges Meynet, Dmitry Bizyaev, Joel R. Brownstein, Pramod Gupta, Sean Morrison, Kaike Pan, Solange V. Ramirez, Hans-Walter Rix, Jose Sanchez-Gallego
- http://arxiv.org/abs/2401.02484
Metallicity Distribution Functions of 13 Ultra-faint Dwarf Galaxy Candidates from Hubble Space Telescope Narrowband Imaging
- Volume 18, Issue 45 - article #5
- Sal Wanying Fu, Daniel R. Weisz, Else Starkenburg, Nicolas Martin, Alessandro Savino, Michael Boylan-Kolchin, Patrick CÃ´tÃ©, Andrew E. Dolphin, Alexander P. Ji, Nicolas Longeard
- The Astrophysical Journal
- https://doi.org/10.3847/1538-4357/ad0030
r-process Abundance Patterns in the Globular Cluster M92
- Volume 18, Issue 44 - article #16
- Evan N. Kirby, Alexander P. Ji, Mikhail Kovalev
- The Astrophysical Journal
- https://doi.org/10.3847/1538-4357/acf309
High-resolution Chemical Abundances of the Nyx Stream
- Volume 18, Issue 39 - article #4
- Shuyu Wang, Lina Necib, Alexander P. Ji, Xiaowei Ou, Mariangela Lisanti, Mithi A. C. de los Reyes, Allison L. Strom, Mimi Truong
- The Astrophysical Journal
- https://doi.org/10.3847/1538-4357/acec4d
Extending the Chemical Reach of the H3 Survey: Detailed Abundances of the Dwarf-galaxy Stellar Stream Wukong/LMS-1. (arXiv:2308.13702v1 [astro-ph.GA])
- Volume 18, Issue 35 - article #1
- Guilherme Limberg, Alexander P. Ji, Rohan P. Naidu, Anirudh Chiti, Silvia Rossi, Sam A. Usman, Yuan-Sen Ting, Dennis Zaritsky, Ana Bonaca, Lais Borbolato, Joshua S. Speagle, Vedant Chandra, Charlie Conroy
- http://arxiv.org/abs/2308.13702
Distant Echoes of the Milky Way's Last Major Merger
- Volume 18, Issue 26 - article #6
- Vedant Chandra, Rohan P. Naidu, Charlie Conroy, Alexander P. Ji, Hans-Walter Rix, Ana Bonaca, Phillip A. Cargile, Jiwon Jesse Han, Benjamin D. Johnson, Yuan-Sen Ting
- The Astrophysical Journal
- https://doi.org/10.3847/1538-4357/accf13
Metallicity Distribution Functions of 13 Ultra-Faint Dwarf Galaxy Candidates from Hubble Space Telescope Narrowband Imaging. (arXiv:2306.06260v1 [astro-ph.GA])
- Volume 18, Issue 24 - article #2
- Sal Wanying Fu, Daniel R. Weisz, Else Starkenburg, Nicolas Martin, Alessandro Savino, Michael Boylan-Kolchin, Patrick Cote, Andrew E. Dolphin, Alexander P. Ji, Nicolas Longeard, Mario L. Mateo, Ekta Patel, Nathan R. Sandford
- http://arxiv.org/abs/2306.06260
Uranium Abundances and Ages of r-process Enhanced Stars with Novel U ii Lines
- Volume 18, Issue 20 - article #15
- 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
188,000 Candidate Very Metal-poor Stars in Gaia DR3 XP Spectra. (arXiv:2303.17676v1 [astro-ph.GA])
- Volume 18, Issue 14 - article #1
- Yupeng Yao, Alexander P. Ji, Sergey E. Koposov, Guilherme Limberg
- http://arxiv.org/abs/2303.17676
Metal Mixing in the R-Process Enhanced Ultra-Faint Dwarf Galaxy Reticulum II. (arXiv:2207.03499v2 [astro-ph.GA] UPDATED)
- Volume 18, Issue 8 - article #6
- Alexander P. Ji, Joshua D. Simon, Ian U. Roederer, Ekaterina Magg, Anna Frebel, Christian I. Johnson, Ralf S. Klessen, Mattis Magg, Gabriele Cescutti, Mario Mateo, Maria Bergemann, John I. Bailey III
- http://arxiv.org/abs/2207.03499
Metal Mixing in the r-process Enhanced Ultrafaint Dwarf Galaxy Reticulum II
- Volume 18, Issue 7 - article #12
- Alexander P. Ji, Joshua D. Simon, Ian U. Roederer, Ekaterina Magg, Anna Frebel, Christian I. Johnson, Ralf S. Klessen, Mattis Magg, Gabriele Cescutti, Mario Mateo
- Astronomical Journal
- https://doi.org/10.3847/1538-3881/acad84
Timing the r-process Enrichment of the Ultra-faint Dwarf Galaxy Reticulum II
- Volume 18, Issue 7 - article #14
- Joshua D. Simon, Thomas M. Brown, BurÃ§in Mutlu-Pakdil, Alexander P. Ji, Alex Drlica-Wagner, Roberto J. Avila, Clara E. MartÃnez-VÃ¡zquez, Ting S. Li, Eduardo Balbinot, Keith Bechtol
- The Astrophysical Journal
- https://doi.org/10.3847/1538-4357/aca9d1
Detailed Chemical Abundances of Stars in the Outskirts of the Tucana II Ultrafaint Dwarf Galaxy
- Volume 18, Issue 3 - article #8
- Anirudh Chiti, Anna Frebel, Alexander P. Ji, Mohammad K. Mardini, Xiaowei Ou, Joshua D. Simon, Helmut Jerjen, Dongwon Kim, John E. Norris
- Astronomical Journal
- https://doi.org/10.3847/1538-3881/aca416
Distant Echoes of the Milky Way's Last Major Merger. (arXiv:2212.00806v1 [astro-ph.GA])
- Volume 17, Issue 48 - article #2
- Vedant Chandra, Rohan P. Naidu, Charlie Conroy, Alexander P. Ji, Hans-Walter Rix, Ana Bonaca, Phillip Cargile, Jiwon Jesse Han, Benjamin D. Johnson, Yuan-Sen Ting, Turner Woody, Dennis Zaritsky
- http://arxiv.org/abs/2212.00806
Timing the r-Process Enrichment of the Ultra-Faint Dwarf Galaxy Reticulum II. (arXiv:2212.00810v1 [astro-ph.GA])
- Volume 17, 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
Public Release of A-SLOTH: Ancient Stars and Local Observables by Tracing Halos. (arXiv:2206.00223v2 [astro-ph.GA] UPDATED)
- Volume 17, Issue 35 - article #7
- Tilman Hartwig, Mattis Magg, Li-Hsin Chen, Yuta Tarumi, Volker Bromm, Simon C. O. Glover, Alexander P. Ji, Ralf S. Klessen, Muhammad A. Latif, Marta Volonteri, Naoki Yoshida
- http://arxiv.org/abs/2206.00223
The chemical abundance pattern of the extremely metal-poor thin disk star 2MASS J1808-5104 and its origins. (arXiv:2208.03891v1 [astro-ph.GA])
- Volume 17, Issue 31 - article #8
- Mohammad K. Mardini, Anna Frebel, Rana Ezzeddine, Anirudh Chiti, Yohai Meiron, Alexander P. Ji, Vinicius M. Placco, Ian U. Roederer, Jorge Meléndez
- http://arxiv.org/abs/2208.03891
The Chemical Composition of Extreme-velocity Stars
- Volume 17, Issue 19 - article #6
- Henrique Reggiani, Alexander P. Ji, Kevin C. Schlaufman, Anna Frebel, Lina Necib, Tyler Nelson, Keith Hawkins, Jhon Yana Galarza
- Astronomical Journal
- https://doi.org/10.3847/1538-3881/ac62d9
Detailed chemical abundances of stars in the outskirts of the Tucana II ultra-faint dwarf galaxy. (arXiv:2205.01740v1 [astro-ph.GA])
- Volume 17, Issue 18 - article #1
- Anirudh Chiti, Anna Frebel, Alexander P. Ji, Mohammad K. Mardini, Xiaowei Ou, Joshua D. Simon, Kaitlin C. Rasmussen, Helmut Jerjen, Dongwon Kim, John E. Norris
- http://arxiv.org/abs/2205.01740
S5: The Orbital and Chemical Properties of One Dozen Stellar Streams
- Volume 17, Issue 17 - article #7
- Ting S. Li, Alexander P. Ji, Andrew B. Pace, Denis Erkal, Sergey E. Koposov, Nora Shipp, Gary S. Da Costa, Lara R. Cullinane, Kyler Kuehn, Geraint F. Lewis
- The Astrophysical Journal
- https://doi.org/10.3847/1538-4357/ac46d3
Tracing stars in Milky Way satellites with A-SLOTH. (arXiv:2202.01220v1 [astro-ph.GA])
- Volume 17, Issue 5 - article #9
- Li-Hsin Chen, Mattis Magg, Tilman Hartwig, Simon C. O. Glover, Alexander P. Ji, Ralf S. Klessen
- http://arxiv.org/abs/2202.01220
Metallicity Distribution Function of the Eridanus~II Ultra-Faint Dwarf Galaxy from Hubble Space Telescope Narrow-band Imaging. (arXiv:2111.00045v1 [astro-ph.GA])
- Volume 16, Issue 45 - article #5
- Sal Wanying Fu, Daniel R. Weisz, Else Starkenburg, Nicolas Martin, Alexander P. Ji, Ekta Patel, Michael Boylan-Kolchin, Patrick Cote, Andrew E. Dolphin, Nicolas Longeard, Mario L. Mateo, Nathan R. Sandford
- http://arxiv.org/abs/2111.00045
Signature of a Massive Rotating Metal-poor Star Imprinted in the Phoenix Stellar Stream
- Volume 16, Issue 45 - article #14
- Andrew R. Casey, Alexander P. Ji, Terese T. Hansen, Ting S. Li, Sergey E. Koposov, Gary S. Da Costa, Joss Bland-Hawthorn, Lara Cullinane, Denis Erkal, Geraint F. Lewis, Kyler Kuehn, Dougal Mackey, Sarah L. Martell, Andrew B. Pace, Jeffrey D. Simpson,, Daniel B. Zucker
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/921/1/67
Kinematics of Antlia 2 and Crater 2 from the Southern Stellar Stream Spectroscopic Survey ( S 5 )
- Volume 16, Issue 44 - article #6
- Alexander P. Ji, Sergey E. Koposov, Ting S. Li, Denis Erkal, Andrew B. Pace, Joshua D. Simon, Vasily Belokurov, Lara R. Cullinane, Gary S. Da Costa, Kyler Kuehn, Geraint F. Lewis, Dougal Mackey, Nora Shipp, Jeffrey D. Simpson, Daniel B. Zucker, Terese T. Hansen, Joss Bland-Hawthorn (S5 Collaboration)
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/921/1/32
Very Large Telescope Spectroscopy of Ultra-faint Dwarf Galaxies. I. Boötes I, Leo IV, and Leo V
- Volume 16, Issue 43 - article #8
- Sydney A. Jenkins, Ting S. Li, Andrew B. Pace, Alexander P. Ji, Sergey E. Koposov,, BurÃ§in Mutlu-Pakdil
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/920/2/92
$S^5$: The Orbital and Chemical Properties of One Dozen Stellar Streams. (arXiv:2110.06950v1 [astro-ph.GA])
- Volume 16, Issue 42 - article #1
- Ting S. Li, Alexander P. Ji, Andrew B. Pace, Denis Erkal, Sergey E. Koposov, Nora Shipp, Gary S. Da Costa, Lara R. Cullinane, Kyler Kuehn, Geraint F. Lewis, Dougal Mackey, Jeffrey D. Simpson, Daniel B. Zucker, Peter S. Ferguson, Sarah L. Martell, Joss Bland-Hawthorn, Eduardo Balbinot, Kiyan Tavangar, Alex Drlica-Wagner, Gayandhi M. De Silva1, Joshua D. Simon, S5 Collaboration
- http://arxiv.org/abs/2110.06950
Signature of a massive rotating metal-poor star imprinted in the Phoenix stellar stream. (arXiv:2109.03948v1 [astro-ph.GA])
- Volume 16, Issue 37 - article #5
- Andrew R. Casey, Alexander P. Ji, Terese T. Hansen, Ting S. Li, Sergey E. Koposov, Gary S. Da Costa, Joss Bland-Hawthorn, Lara Cullinane, Denis Erkal, Geraint F. Lewis, Kyler Kuehn, Dougal Mackey, Sarah L. Martell, Andrew B. Pace, Jeffrey D. Simpson, Daniel B. Zucker
- http://arxiv.org/abs/2109.03948
S 5 : The Destruction of a Bright Dwarf Galaxy as Revealed by the Chemistry of the Indus Stellar Stream
- Volume 16, Issue 29 - article #10
- Terese T. Hansen, Alexander P. Ji, Gary S. Da Costa, Ting S. Li, Andrew R. Casey, Andrew B. Pace, Lara R. Cullinane, Denis Erkal, Sergey E. Koposov, Kyler Kuehn, Geraint F. Lewis, Dougal Mackey, Jeffrey D. Simpson, Nora Shipp, Daniel B. Zucker, Joss Bland-Hawthorn ( S 5 Collaboration)
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/915/2/103
Kinematics of Antlia 2 and Crater 2 from The Southern Stellar Stream Spectroscopic Survey (S5). (arXiv:2106.12656v1 [astro-ph.GA])
- Volume 16, Issue 26 - article #1
- Alexander P. Ji, Sergey E. Koposov, Ting S. Li, Denis Erkal, Andrew B. Pace, Joshua D. Simon, Vasily Belokurov, Lara R. Cullinane, Gary S. Da Costa, Kyler Kuehn, Geraint F. Lewis, Dougal Mackey, Nora Shipp, Jeffrey D. Simpson, Daniel B. Zucker, Terese T. Hansen, Joss Bland-Hawthorn, S5 Collaboration
- http://arxiv.org/abs/2106.12656
R -process-rich Stellar Streams in the Milky Way
- Volume 16, Issue 19 - article #8
- Maude Gull, Anna Frebel, Karina Hinojosa, Ian U. Roederer, Alexander P. Ji,, Kaley Brauer
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/912/1/52
VLT Spectroscopy of Ultra-Faint Dwarf Galaxies. 1. Bo{"o}tes I, Leo IV, Leo V. (arXiv:2101.00013v1 [astro-ph.GA])
- Volume 16, Issue 2 - article #6
- Sydney Jenkins, Ting S. Li, Andrew B. Pace, Alexander P. Ji, Sergey E. Koposov, Burcin Mutlu-Pakdil
- http://arxiv.org/abs/2101.00013
An extended halo around an ancient dwarf galaxy. (arXiv:2012.02309v1 [astro-ph.GA])
- Volume 15, Issue 50 - article #1
- Anirudh Chiti, Anna Frebel, Joshua D. Simon, Denis Erkal, Laura J. Chang, Lina Necib, Alexander P. Ji, Helmut Jerjen, Dongwon Kim, John E. Norris
- http://arxiv.org/abs/2012.02309
Collapsar R-Process Yields Can Reproduce [Eu/Fe] Abundance Scatter in Metal-Poor Stars. (arXiv:2010.15837v1 [astro-ph.HE])
- Volume 15, Issue 45 - article #1
- Kaley Brauer, Alexander P. Ji, Maria R. Drout, Anna Frebel
- http://arxiv.org/abs/2010.15837
The Southern Stellar Stream Spectroscopic Survey ( S 5 ): Chemical Abundances of Seven Stellar Streams
- Volume 15, Issue 39 - article #15
- 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 Southern Stellar Stream Spectroscopic Survey (S5): Chemical Abundances of Seven Stellar Streams. (arXiv:2008.07568v1 [astro-ph.SR])
- Volume 15, Issue 34 - article #6
- 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
- http://arxiv.org/abs/2008.07568
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 tidal remnant of an unusually metal-poor globular cluster. (arXiv:2007.14577v1 [astro-ph.GA])
- Volume 15, Issue 31 - article #10
- Zhen Wan, Geraint F. Lewis, Ting S. Li, Jeffrey D. Simpson, Sarah L. Martell, Daniel B. Zucker, Jeremy R. Mould, Denis Erkal, Andrew B. Pace, Dougal Mackey, Alexander P. Ji, Sergey E. Koposov, Kyler Kuehn, Nora Shipp, Eduardo Balbinot, Joss Bland-Hawthorn, Andrew R. Casey, Gary S. Da Costa, Prajwal Kafle, Sanjib Sharma, Gayandhi M. De Silva
- http://arxiv.org/abs/2007.14577
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
Broken into Pieces: ATLAS and Aliqa Uma as One Single Stream. (arXiv:2006.10763v1 [astro-ph.GA])
- Volume 15, Issue 26 - article #3
- Ting S. Li, Sergey E. Koposov, Denis Erkal, Alexander P. Ji, Nora Shipp, Andrew B. Pace, Tariq Hilmi, Kyler Kuehn, Geraint F. Lewis, Dougal Mackey, Jeffrey D. Simpson, Zhen Wan, Daniel B. Zucker, Joss Bland-Hawthorn, Lara R. Cullinane, Gary S. Da Costa, Alex Drlica-Wagner, Kohei Hattori, Sarah L. Martell, Sanjib Sharma
- http://arxiv.org/abs/2006.10763
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: 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
The Lanthanide Fraction Distribution in Metal-poor Stars: A Test of Neutron Star Mergers as the Dominant r -process Site
- Volume 14, Issue 35 - article #6
- Alexander P. Ji, Maria R. Drout,, Terese T. Hansen
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/882/1/40
The Origin of r -process Enhanced Metal-poor Halo Stars In Now-destroyed Ultra-faint Dwarf Galaxies
- Volume 14, Issue 6 - article #15
- Kaley Brauer, Alexander P. Ji, Anna Frebel, Gregory A. Dooley, Facundo A. GÃ³mez,, Brian W. OâShea
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/871/2/247
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
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
Chemical Abundances in the Ultra-faint Dwarf Galaxies Grus I and Triangulum II: Neutron-capture Elements as a Defining Feature of the Faintest Dwarfs
- Volume 14, Issue 2 - article #4
- Alexander P. Ji, Joshua D. Simon, Anna Frebel, Kim A. Venn,, Terese T. Hansen
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/870/2/83
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])
- Volume 13, Issue 37 - article #1
- Alexander P. Ji, Joshua D. Simon, Anna Frebel, Kim A. Venn, Terese T. Hansen
- http://arxiv.org/abs/1809.02182
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
Chemical Abundances of New Member Stars in the Tucana II Dwarf Galaxy
- Volume 13, Issue 16 - article #19
- Anirudh Chiti, Anna Frebel, Alexander P. Ji, Helmut Jerjen, Dongwon Kim,, John E. Norris
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/857/1/74
From Actinides to Zinc: Using the Full Abundance Pattern of the Brightest Star in Reticulum II to Distinguish between Different r -process Sites
- Volume 13, Issue 14 - article #20
- Alexander P. Ji, Anna Frebel
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/856/2/138
Chemical Abundances of new member stars in the Tucana II dwarf galaxy. (arXiv:1803.01808v1 [astro-ph.GA])
- Volume 13, Issue 10 - article #2
- Anirudh Chiti, Anna Frebel, Alexander P. Ji, Helmut Jerjen, Dongwon Kim, John E. Norris
- http://arxiv.org/abs/1803.01808
Descendants of the first stars: the distinct chemical signature of second generation stars. (arXiv:1801.05044v1 [astro-ph.GA])
- Volume 13, Issue 3 - article #2
- Tilman Hartwig, Naoki Yoshida, Mattis Magg, Anna Frebel, Simon C. O. Glover, Facundo A. Gómez, Brendan Griffen, Miho N. Ishigaki, Alexander P. Ji, Ralf S. Klessen, Brian W. O'Shea, Nozomu Tominaga
- http://arxiv.org/abs/1801.05044
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
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
CHEMICAL DIVERSITY IN THE ULTRA-FAINT DWARF GALAXY TUCANA II
- Volume 11, Issue 47 - article #23
- Alexander P. Ji, Anna Frebel, Rana Ezzeddine,, Andrew R. Casey
- The Astrophysical Journal Letters
- http://iopscience.iop.org/2041-8205/832/1/L3
Tracing the first stars and galaxies of the Milky Way. (arXiv:1611.00759v1 [astro-ph.GA])
- Volume 11, Issue 45 - article #18
- Brendan F. Griffen, Gregory A. Dooley, Alexander P. Ji, Brian W. O'Shea, Facundo A. Gómez, Anna Frebel
- http://arxiv.org/abs/1611.00759
Complete Element Abundances of Nine Stars in the r-process Galaxy Reticulum II
- Volume 11, Issue 43 - article #22
- Alexander P. Ji, Anna Frebel, Joshua D. Simon,, Anirudh Chiti
- The Astrophysical Journal
- http://iopscience.iop.org/0004-637X/830/2/93
R-process enrichment from a single event in an ancient dwarf galaxy. (arXiv:1512.01558v4 [astro-ph.GA] UPDATED)
- Volume 11, Issue 39 - article #14
- Alexander P. Ji, Anna Frebel, Anirudh Chiti, Joshua D. Simon
- http://arxiv.org/abs/1512.01558
Chemical Diversity in the Ultra-faint Dwarf Galaxy Tucana II. (arXiv:1609.02915v1 [astro-ph.GA])
- Volume 11, Issue 38 - article #4
- Alexander P. Ji, Anna Frebel, Rana Ezzeddine, Andrew R. Casey
- http://arxiv.org/abs/1609.02915
Complete element abundances of nine stars in the r-process galaxy Reticulum II. (arXiv:1607.07447v1 [astro-ph.GA])
- Volume 11, Issue 31 - article #1
- Alexander P. Ji, Anna Frebel, Joshua D. Simon, Anirudh Chiti
- http://arxiv.org/abs/1607.07447
The Caterpillar Project: A Large Suite of Milky Way Sized Halos
- Volume 11, Issue 9 - article #15
- Brendan F. Griffen, Alexander P. Ji, Gregory A. Dooley, Facundo A. GÃ³mez, Mark Vogelsberger, Brian W. O'Shea, and Anna Frebel
- The Astrophysical Journal - Volume: 818, Issue: 1
- View article PDF (4.15 MB)
High-resolution Spectroscopy of Extremely Metal-poor Stars in the Least-evolved Galaxies: Bootes II
- Volume 11, Issue 6 - article #20
- 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
- Volume 10, Issue 40 - article #7
- Alexander P. Ji, Anna Frebel, Joshua D. Simon, Marla Geha
- arXiv.org - Astrophysics - Volume: 2015, Issue: 30 Oct
- arXiv:1510.07632 [pdf, other]
Preserving chemical signatures of primordial star formation in the first low-mass stars
- Volume 10, Issue 39 - article #24
- Alexander P. Ji, Anna Frebel, and Volker Bromm
- Monthly Notices of the Royal Astronomical Society - Volume: 454, Issue: 1
- Abstract Full Text (HTML) Full Text (PDF)
The Caterpillar Project: A Large Suite of Milky Way Sized Halos
- Volume 10, Issue 33 - article #9
- Brendan F. Griffen, Alexander P. Ji, Gregory A. Dooley, Facundo A. Gómez, Mark Vogelsberger, Brian W. O'Shea, Anna Frebel
- arXiv.org - Astrophysics - Volume: 2015, Issue: 11 Sep
- arXiv:1509.01255 [pdf, other]
The Chemical Imprint of Silicate Dust on the Most Metal-poor Stars
- Volume 9, Issue 8 - article #27
- Alexander P. Ji, Anna Frebel, and Volker Bromm
- The Astrophysical Journal - Volume: 782, Issue: 2
- View article PDF (1017 KB)
The Chemical Imprint of Dust on the Most Metal-Poor Stars
- Volume 8, Issue 28 - article #12
- Alexander P. Ji, Anna Frebel, Volker Bromm
- arXiv.org - Astrophysics - Volume: 2013, Issue: 12 Jul
- arXiv:1307.2239 [pdf, other]

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