A
Anna Frebel
Researcher at Massachusetts Institute of Technology
Publications - 311
Citations - 16747
Anna Frebel is an academic researcher from Massachusetts Institute of Technology. The author has contributed to research in topics: Stars & Galaxy. The author has an hindex of 71, co-authored 291 publications receiving 14877 citations. Previous affiliations of Anna Frebel include Australian National University & Harvard University.
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Journal ArticleDOI
Nucleosynthetic signatures of the first stars
Anna Frebel,Wako Aoki,Norbert Christlieb,Hiroyasu Ando,Martin Asplund,Paul S. Barklem,Timothy C. Beers,Kjell Eriksson,Cora Fechner,Masayuki Y. Fujimoto,Satoshi Honda,Toshitaka Kajino,Takeo Minezaki,Ken'ichi Nomoto,John E. Norris,Sean G. Ryan,Masahide Takada-Hidai,Stelios Tsangarides,Yuzuru Yoshii +18 more
TL;DR: The discovery of HE1327–2326 is reported, a subgiant or main-sequence star with an iron abundance about a factor of two lower than that of HE0107–5240, suggesting a similar origin of the abundance patterns.
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Near-Field Cosmology with Extremely Metal-Poor Stars
Anna Frebel,John E. Norris +1 more
TL;DR: The most metal-poor stars in the Galactic halo and satellite dwarf galaxies provide an opportunity to explore the chemical and physical conditions of the earliest star-forming environments in the Universe.
Journal ArticleDOI
R-process enrichment from a single event in an ancient dwarf galaxy
TL;DR: It is reported that seven of the nine brightest stars in Reticulum II, observed with high-resolution spectroscopy, show strong enhancements in heavy neutron-capture elements, with abundances that follow the universal r-process pattern beyond barium.
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A single low-energy, iron-poor supernova as the source of metals in the star SMSS J031300.36−670839.3
Stefan Keller,Michael S. Bessell,Anna Frebel,Andrew R. Casey,Martin Asplund,Heather R. Jacobson,Karin Lind,John E. Norris,David Yong,Alexander Heger,Zazralt Magic,G. S. Da Costa,Brian P. Schmidt,P. Tisserand +13 more
TL;DR: It is concluded that low-energy supernovae were common in the early Universe, and that suchsupernovae yielded light-element enrichment with insignificant iron.
Journal ArticleDOI
Uncovering Extremely Metal-Poor Stars in the Milky Way’s Ultrafaint Dwarf Spheroidal Satellite Galaxies*
TL;DR: In this paper, the authors presented the first spectroscopic metallicities at [Fe/H ] < − 3.0 of stars in a dwarf galaxy, with individual stellar metallicities as low as [ Fe/H] = −3.3.