On the Origin of HE 0107-5240, the Most Iron-deficient Star Presently Known
نویسندگان
چکیده
منابع مشابه
On the origin of HE 0107 - 5240 , the most iron deficient star presently known
We show that the ”puzzling” chemical composition observed in the extremely metal poor star HE0107-5240 may be naturally explained by the concurrent pollution of at least two supernovae. In the simplest possible model a supernova of quite low mass (∼ 15 M⊙), underwent a ”normal” explosion and ejected ∼ 0.06 M⊙ of Ni while a second one was massive enough (∼ 35 M⊙) to experience a strong fall back...
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We report a detailed abundance analysis for HE 0107−5240, a halo giant with [Fe/H]NLTE = −5.3. This star was discovered in the course of follow-up mediumresolution spectroscopy of extremely metal-poor candidates selected from the digitized Hamburg/ESO objective-prism survey. On the basis of high-resolution VLT/UVES spectra, we derive abundances for 8 elements (C, N, Na, Mg, Ca, Ti, Fe, and Ni),...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2003
ISSN: 0004-637X,1538-4357
DOI: 10.1086/378734