R
Rana Ezzeddine
Researcher at Massachusetts Institute of Technology
Publications - 46
Citations - 1130
Rana Ezzeddine is an academic researcher from Massachusetts Institute of Technology. The author has contributed to research in topics: Stars & Metallicity. The author has an hindex of 18, co-authored 46 publications receiving 853 citations. Previous affiliations of Rana Ezzeddine include Michigan State University & University of Florida.
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The R-Process Alliance: First Release from the Northern Search for r-process-enhanced Metal-poor Stars in the Galactic Halo
Charli M. Sakari,Vinicius M. Placco,Vinicius M. Placco,Elizabeth M. Farrell,Ian U. Roederer,Ian U. Roederer,George Wallerstein,Timothy C. Beers,Timothy C. Beers,Rana Ezzeddine,Anna Frebel,Terese T. Hansen,Erika M. Holmbeck,Erika M. Holmbeck,Christopher Sneden,John J. Cowan,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 F. Navarro,Warren A. Reid,Warren A. Reid,George M. Seabroke,Matthias Steinmetz,Fred Watson +33 more
TL;DR: In this paper, the detailed abundances and r-process classifications of 126 newly identified metal-poor stars are presented as part of an ongoing collaboration, the R-Process Alliance.
Journal ArticleDOI
RAVE J203843.2–002333: The First Highly R-process-enhanced Star Identified in the RAVE Survey*
Vinicius M. Placco,Erika M. Holmbeck,Anna Frebel,Timothy C. Beers,Rebecca Surman,Alexander P. Ji,Rana Ezzeddine,Sean Points,Catherine C. Kaleida,Terese T. Hansen,Charli M. Sakari,Andrew R. Casey +11 more
TL;DR: In this article, the discovery of RAVE J203843 is reported, which is a very metal-poor star with a clearly measured U abundance, and age estimates were calculated using Th/X and U/X abundance ratios.
Journal ArticleDOI
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*
Ian U. Roederer,Ian U. Roederer,Charli M. Sakari,Vinicius M. Placco,Vinicius M. Placco,Timothy C. Beers,Timothy C. Beers,Rana Ezzeddine,Rana Ezzeddine,Anna Frebel,Anna Frebel,Terese T. Hansen +11 more
TL;DR: In this article, a detailed abundance analysis of the bright (V = 9.02), metal-poor (Fe/H] = -1.47 +/- 0.08) field red horizontal-branch star HD 222925, which was observed as part of an ongoing survey by the R-Process Alliance, is presented.
Journal ArticleDOI
Evidence for an aspherical Population III supernova explosion inferred from the hyper metal-poor star HE1327-2326
Rana Ezzeddine,Anna Frebel,Ian U. Roederer,Nozomu Tominaga,Jason Tumlinson,Miho N. Ishigaki,Ken'ichi Nomoto,Vinicius M. Placco,Wako Aoki +8 more
TL;DR: In this article, the authors present observational evidence that an aspherical supernova explosion could have occurred in the first stars in the early universe, based on the First determination of a Zn abundance in a Hubble Space Telescope/Cosmic Origins Spectrograph high-resolution UV spectrum of a hyper metal-poor (HMP) star, HE1327-2326, with [Fe/H](NLTE) = -5.2.
Journal ArticleDOI
Chemical Diversity in the Ultra-faint Dwarf Galaxy Tucana II
Alexander P. Ji,Alexander P. Ji,Anna Frebel,Anna Frebel,Rana Ezzeddine,Rana Ezzeddine,Andrew R. Casey +6 more
TL;DR: The first detailed chemical abundance study of the ultra-faint dwarf galaxy Tucana II based on high-resolution Magellan/MIKE spectra of four red giant stars is presented in this paper.