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Alexander P. Ji - Publications

Affiliations: 
2012-2017 Physics Massachusetts Institute of Technology, Cambridge, MA, United States 
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43 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2021 Brauer K, Ji AP, Drout MR, Frebel A. Collapsar R-process Yields Can Reproduce [Eu/Fe] Abundance Scatter in Metal-poor Stars The Astrophysical Journal. 915: 81. DOI: 10.3847/1538-4357/ac00b2  0.484
2021 Hansen TT, Ji AP, Da Costa GS, Li TS, Casey AR, Pace AB, Cullinane LR, Erkal D, Koposov SE, Kuehn K, Lewis GF, Mackey D, Simpson JD, Shipp N, Zucker DB, et al. S 5: The Destruction of a Bright Dwarf Galaxy as Revealed by the Chemistry of the Indus Stellar Stream The Astrophysical Journal. 915: 103. DOI: 10.3847/1538-4357/abfc54  0.544
2021 Gull M, Frebel A, Hinojosa K, Roederer IU, Ji AP, Brauer K. R-process-rich Stellar Streams in the Milky Way* The Astrophysical Journal. 912: 52. DOI: 10.3847/1538-4357/abea1a  0.663
2021 Chiti A, Frebel A, Simon JD, Erkal D, Chang LJ, Necib L, Ji AP, Jerjen H, Kim D, Norris JE. An extended halo around an ancient dwarf galaxy Nature Astronomy. 5: 392-400. DOI: 10.1038/S41550-020-01285-W  0.793
2020 Wan Z, Lewis GF, Li TS, Simpson JD, Martell SL, Zucker DB, Mould JR, Erkal D, Pace AB, Mackey D, Ji AP, Koposov SE, Kuehn K, Shipp N, Balbinot E, et al. The tidal remnant of an unusually metal-poor globular cluster. Nature. 583: 768-770. PMID 32728241 DOI: 10.1038/S41586-020-2483-6  0.477
2020 Ezzeddine R, Rasmussen K, Frebel A, Chiti A, Hinojisa K, Placco VM, Ji AP, Beers TC, Hansen TT, Roederer IU, Sakari CM, Melendez J. The R-Process Alliance: First Magellan/MIKE Release from the Southern Search for R-process-enhanced Stars The Astrophysical Journal. 898: 150. DOI: 10.3847/1538-4357/Ab9D1A  0.812
2020 Placco VM, Santucci RM, Yuan Z, Mardini MK, Holmbeck EM, Wang X, Surman R, Hansen TT, Roederer IU, Beers TC, Choplin A, Ji AP, Ezzeddine R, Frebel A, Sakari CM, et al. The R-process Alliance: The Peculiar Chemical Abundance Pattern of RAVE J183013.5−455510 The Astrophysical Journal. 897: 78. DOI: 10.3847/1538-4357/Ab99C6  0.775
2020 Cain M, Frebel A, Ji AP, Placco VM, Ezzeddine R, Roederer IU, Hattori K, Beers TC, Meléndez J, Hansen TT, Sakari CM. 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 The Astrophysical Journal. 898: 40. DOI: 10.3847/1538-4357/Ab97Ba  0.781
2020 Ji AP, Li TS, Simon JD, Marshall J, Vivas AK, Pace AB, Bechtol K, Drlica-Wagner A, Koposov SE, Hansen TT, Allam S, Gruendl RA, Johnson MD, McNanna M, Noël NED, et al. Detailed Abundances in the Ultra-faint Magellanic Satellites Carina II and III The Astrophysical Journal. 889: 27. DOI: 10.3847/1538-4357/Ab6213  0.682
2020 Ji AP, Li TS, Hansen TT, Casey AR, Koposov SE, Pace AB, Mackey D, Lewis GF, Simpson JD, Bland-Hawthorn J, Cullinane LR, Da Costa GS, Hattori K, Martell SL, Kuehn K, et al. The Southern Stellar Stream Spectroscopic Survey (S 5): Chemical Abundances of Seven Stellar Streams The Astronomical Journal. 160: 181. DOI: 10.3847/1538-3881/abacb6  0.419
2020 Reggiani H, Schlaufman KC, Casey AR, Ji AP. The Most Metal-poor Stars in the Inner Bulge The Astronomical Journal. 160: 173. DOI: 10.3847/1538-3881/ABA948  0.44
2020 Hawkins K, Lucey M, Ting Y, Ji A, Katzberg D, Thompson M, El-Badry K, Teske J, Nelson T, Carrillo A. Identical or fraternal twins? The chemical homogeneity of wide binaries from Gaia DR2 Monthly Notices of the Royal Astronomical Society. 492: 1164-1179. DOI: 10.1093/Mnras/Stz3132  0.5
2019 Ji AP, Drout MR, Hansen TT. The Lanthanide Fraction Distribution in Metal-poor Stars: A Test of Neutron Star Mergers as the Dominant r-process Site The Astrophysical Journal. 882: 40. DOI: 10.3847/1538-4357/Ab3291  0.708
2019 Kozłowski S, Bañados E, Udalski A, Morrell N, Ji AP, Wyrzykowski Ł, Rau A, Mróz P, Greiner J, Gromadzki M, Szymański MK, Soszyński I, Poleski R, Pietrukowicz P, Skowron J, et al. Discovery of two quasars at z = 5 from the OGLE Survey The Astrophysical Journal. 878: 115. DOI: 10.3847/1538-4357/Ab20D1  0.513
2019 Brauer K, Ji AP, Frebel A, Dooley GA, Gómez FA, O’Shea BW. The Origin of r-process Enhanced Metal-poor Halo Stars In Now-destroyed Ultra-faint Dwarf Galaxies The Astrophysical Journal. 871: 247. DOI: 10.3847/1538-4357/Aafafb  0.819
2019 Ji AP, Simon JD, Frebel A, Venn KA, Hansen TT. Chemical Abundances in the Ultra-faint Dwarf Galaxies Grus I and Triangulum II: Neutron-capture Elements as a Defining Feature of the Faintest Dwarfs The Astrophysical Journal. 870: 83. DOI: 10.3847/1538-4357/Aaf3Bb  0.775
2019 Placco VM, Santucci RM, Beers TC, Chanamé J, Sepúlveda MP, Coronado J, Rossi S, Lee YS, Starkenburg E, Youakim K, Barrientos M, Ezzeddine R, Frebel A, Hansen TT, Holmbeck EM, ... Ji AP, et al. The R-Process Alliance: Spectroscopic Follow-up of Low-metallicity Star Candidates from the Best & Brightest Survey The Astrophysical Journal. 870: 122. DOI: 10.3847/1538-4357/Aaf3B9  0.771
2019 Koposov SE, Boubert D, Li TS, Erkal D, Costa GSD, Zucker DB, Ji AP, Kuehn K, Lewis GF, Mackey D, Simpson JD, Shipp N, Wan Z, Belokurov V, Bland-Hawthorn J, et al. Discovery of a nearby 1700 km/s star ejected from the Milky Way by Sgr A* Monthly Notices of the Royal Astronomical Society. 491: 2465-2480. DOI: 10.1093/Mnras/Stz3081  0.56
2019 Li TS, Koposov SE, Zucker DB, Lewis GF, Kuehn K, Simpson JD, Ji AP, Shipp N, Mao Y, Geha M, Pace AB, Mackey AD, Allam S, Tucker DL, Costa GSD, et al. The southern stellar stream spectroscopic survey (S5) : Overview, target selection, data reduction, validation, and early science Monthly Notices of the Royal Astronomical Society. 490: 3508-3531. DOI: 10.1093/Mnras/Stz2731  0.543
2019 Norfolk BJ, Casey AR, Karakas AI, Miles MT, Kemp AJ, Schlaufman KC, Ness M, Ho AYQ, Lattanzio JC, Ji AP. Discovery of s-process enhanced stars in the LAMOST survey Monthly Notices of the Royal Astronomical Society. 490: 2219-2227. DOI: 10.1093/Mnras/Stz2630  0.608
2019 Brauer K, Ji AP, Hattori K, Escobar S, Frebel A. Kinematics of highly r-process-enhanced halo stars: Evidence for origins in now-destroyed ultra-faint dwarf galaxies Proceedings of the International Astronomical Union. 14: 71-74. DOI: 10.1017/S1743921319008755  0.8
2018 Cain M, Frebel A, Gull M, Ji AP, Placco VM, Beers TC, Meléndez J, Ezzeddine R, Casey AR, Hansen TT, Roederer IU, Sakari C. The R-Process Alliance: Chemical Abundances for a Trio of r-process-enhanced Stars—One Strong, One Moderate, and One Mild The Astrophysical Journal. 864: 43. DOI: 10.3847/1538-4357/Aad37D  0.763
2018 Gull M, Frebel A, Cain MG, Placco VM, Ji AP, Abate C, Ezzeddine R, Karakas AI, Hansen TT, Sakari C, Holmbeck EM, Santucci RM, Casey AR, Beers TC. The R-Process Alliance: Discovery of the First Metal-poor Star with a Combined r- and s-process Element Signature The Astrophysical Journal. 862: 174. DOI: 10.3847/1538-4357/Aacbc3  0.77
2018 Chiti A, Frebel A, Ji AP, Jerjen H, Kim D, Norris JE. Erratum: “Chemical Abundances of New Member Stars in the Tucana II Dwarf Galaxy” (2018, ApJ, 857, 74) The Astrophysical Journal. 860: 86. DOI: 10.3847/1538-4357/Aac48F  0.79
2018 Li TS, Simon JD, Pace AB, Torrealba G, Kuehn K, Drlica-Wagner A, Bechtol K, Vivas AK, Marel RPvd, Wood M, Yanny B, Belokurov V, Jethwa P, Zucker DB, Lewis G, ... ... Ji AP, et al. Ships Passing in the Night: Spectroscopic Analysis of Two Ultra-faint Satellites in the Constellation Carina The Astrophysical Journal. 857: 145. DOI: 10.3847/1538-4357/Aab666  0.59
2018 Chiti A, Frebel A, Ji AP, Jerjen H, Kim D, Norris JE. Chemical Abundances of New Member Stars in the Tucana II Dwarf Galaxy The Astrophysical Journal. 857: 74. DOI: 10.3847/1538-4357/Aab4Fc  0.734
2018 Ji AP, Frebel A. From actinides to zinc: Using the full abundance pattern of the brightest star in Reticulum II to distinguish between different r-process sites The Astrophysical Journal. 856: 138. DOI: 10.3847/1538-4357/Aab14A  0.785
2018 Safarzadeh M, Ji AP, Dooley GA, Frebel A, Scannapieco E, Gómez FA, O'Shea BW. Selecting ultra-faint dwarf candidate progenitors in cosmological N-body simulations at high redshifts Monthly Notices of the Royal Astronomical Society. 476: 5006-5015. DOI: 10.1093/Mnras/Sty595  0.711
2018 Kemp AJ, Casey AR, Miles MT, Norfolk BJ, Lattanzio JC, Karakas AI, Schlaufman KC, Ho AYQ, Tout CA, Ness M, Ji AP. On the discovery of K-enhanced and possibly Mg-depleted stars throughout the Milky Way Monthly Notices of the Royal Astronomical Society. 480: 1384-1392. DOI: 10.1093/Mnras/Sty1915  0.498
2018 Hartwig T, Yoshida N, Magg M, Frebel A, Glover SCO, Gómez FA, Griffen B, Ishigaki MN, Ji AP, Klessen RS, O’Shea BW, Tominaga N. Descendants of the first stars: the distinct chemical signature of second-generation stars Monthly Notices of the Royal Astronomical Society. 478: 1795-1810. DOI: 10.1093/Mnras/Sty1176  0.77
2017 Drout MR, Piro AL, Shappee BJ, Kilpatrick CD, Simon JD, Contreras C, Coulter DA, Foley RJ, Siebert MR, Morrell N, Boutsia K, Di Mille F, Holoien TW, Kasen D, Kollmeier JA, ... ... Ji AP, et al. Light curves of the neutron star merger GW170817/SSS17a: Implications for r-process nucleosynthesis. Science (New York, N.Y.). PMID 29038375 DOI: 10.1126/Science.Aaq0049  0.558
2017 Shappee BJ, Simon JD, Drout MR, Piro AL, Morrell N, Prieto JL, Kasen D, Holoien TW, Kollmeier JA, Kelson DD, Coulter DA, Foley RJ, Kilpatrick CD, Siebert MR, Madore BF, ... ... Ji AP, et al. Early spectra of the gravitational wave source GW170817: Evolution of a neutron star merger. Science (New York, N.Y.). PMID 29038374 DOI: 10.1126/Science.Aaq0186  0.386
2017 Placco VM, Holmbeck EM, Frebel A, Beers TC, Surman RA, Ji AP, Ezzeddine R, Points SD, Kaleida CC, Hansen TT, Sakari CM, Casey AR. RAVE J203843.2–002333: The First Highly R-process-enhanced Star Identified in the RAVE Survey The Astrophysical Journal. 844: 18. DOI: 10.3847/1538-4357/Aa78Ef  0.776
2017 Griffen BF, Dooley GA, Ji AP, O'Shea BW, Gómez FA, Frebel A. Tracing the first stars and galaxies of the Milky Way Monthly Notices of the Royal Astronomical Society. 474: 443-459. DOI: 10.1093/Mnras/Stx2749  0.769
2016 Ji AP, Frebel A, Chiti A, Simon JD. R-process enrichment from a single event in an ancient dwarf galaxy. Nature. PMID 27001693 DOI: 10.1038/Nature17425  0.825
2016 Ji AP, Frebel A, Ezzeddine R, Casey AR. Chemical Diversity in the Ultra-faint Dwarf Galaxy Tucana II The Astrophysical Journal. 832. DOI: 10.3847/2041-8205/832/1/L3  0.781
2016 Ji AP, Frebel A, Simon JD, Chiti A. COMPLETE ELEMENT ABUNDANCES OF NINE STARS IN THE r-PROCESS GALAXY RETICULUM II The Astrophysical Journal. 830: 93. DOI: 10.3847/0004-637X/830/2/93  0.848
2016 Griffen BF, Ji AP, Dooley GA, Gómez FA, Vogelsberger M, O'Shea BW, Frebel A. THE CATERPILLAR PROJECT: A LARGE SUITE OF MILKY WAY SIZED HALOS Astrophysical Journal. 818. DOI: 10.3847/0004-637X/818/1/10  0.674
2016 Ji AP, Frebel A, Simon JD, Geha M. HIGH-RESOLUTION SPECTROSCOPY of EXTREMELY METAL-POOR STARS in the LEAST EVOLVED GALAXIES: BOÖTES II Astrophysical Journal. 817. DOI: 10.3847/0004-637X/817/1/41  0.737
2015 Ji AP, Frebel A, Bromm V. Preserving chemical signatures of primordial star formation in the first low-mass stars Monthly Notices of the Royal Astronomical Society. 454: 659-674. DOI: 10.1093/Mnras/Stv2052  0.785
2015 Frebel A, Chiti A, Ji AP, Jacobson HR, Placco VM. SD 1313-0019: ANOTHER SECOND-GENERATION STAR with [Fe/H] = -5.0, OBSERVED with the MAGELLAN TELESCOPE Astrophysical Journal Letters. 810. DOI: 10.1088/2041-8205/810/2/L27  0.812
2014 Dooley GA, Griffen BF, Zukin P, Ji AP, Vogelsberger M, Hernquist LE, Frebel A. The effects of varying cosmological parameters on halo substructure Astrophysical Journal. 786. DOI: 10.1088/0004-637X/786/1/50  0.643
2014 Ji AP, Frebel A, Bromm V. The chemical imprint of silicate dust on the most metal-poor stars Astrophysical Journal. 782. DOI: 10.1088/0004-637X/782/2/95  0.709
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