Spectroscopic Studies of Extremely Metal-poor Stars with the Subaru High-Dispersion Spectrograph. IV. The α-Element-Enhanced Metal-poor Star BS 16934-002
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Aoki, Wako; Honda, Satoshi; Beers, Timothy C; Takada-Hidai, Masahide; Iwamoto, Nobuyuki; Tominaga, Nozomu; Umeda, Hideyuki; Nomoto, Ken'ichi; Norris, John; Ryan, Sean G
Description
A detailed elemental abundance analysis has been carried out for the very metal-poor ([Fe/H] = -2.7) star BS 16934-002, which was identified in our previous work as a star exhibiting large overabundances of Mg and Sc. A comparison of the abundance pattern of this star with that of the well-studied metal-poor star HD 122563 indicates excesses of O, Na, Mg, Al, and Sc in BS 16934-002. Of particular interest, no excess of C or N is found in this object, in contrast to CS 22949-037 and CS...[Show more]
dc.contributor.author | Aoki, Wako | |
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dc.contributor.author | Honda, Satoshi | |
dc.contributor.author | Beers, Timothy C | |
dc.contributor.author | Takada-Hidai, Masahide | |
dc.contributor.author | Iwamoto, Nobuyuki | |
dc.contributor.author | Tominaga, Nozomu | |
dc.contributor.author | Umeda, Hideyuki | |
dc.contributor.author | Nomoto, Ken'ichi | |
dc.contributor.author | Norris, John | |
dc.contributor.author | Ryan, Sean G | |
dc.date.accessioned | 2015-12-07T22:40:55Z | |
dc.identifier.issn | 0004-637X | |
dc.identifier.uri | http://hdl.handle.net/1885/24073 | |
dc.description.abstract | A detailed elemental abundance analysis has been carried out for the very metal-poor ([Fe/H] = -2.7) star BS 16934-002, which was identified in our previous work as a star exhibiting large overabundances of Mg and Sc. A comparison of the abundance pattern of this star with that of the well-studied metal-poor star HD 122563 indicates excesses of O, Na, Mg, Al, and Sc in BS 16934-002. Of particular interest, no excess of C or N is found in this object, in contrast to CS 22949-037 and CS 29498-043, two previously known carbon-rich, extremely metal-poor stars with excesses of the α-elements. No established nucleosynthesis model exists that explains the observed abundance pattern of BS 16934-002. A supernova model, including mixing and fallback and assuming severe mass loss before explosion, is discussed as a candidate progenitor of BS 16934-002. | |
dc.publisher | IOP Publishing | |
dc.source | Astrophysical Journal, The | |
dc.subject | Keywords: Nuclear reactions, nucleosynthesis, abundances; Stars: abundances; Stars: individual (BS 16934-002); Stars: Population II; Supernovae: general | |
dc.title | Spectroscopic Studies of Extremely Metal-poor Stars with the Subaru High-Dispersion Spectrograph. IV. The α-Element-Enhanced Metal-poor Star BS 16934-002 | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 660 | |
dc.date.issued | 2007 | |
local.identifier.absfor | 020110 - Stellar Astronomy and Planetary Systems | |
local.identifier.ariespublication | u4362859xPUB30 | |
local.type.status | Published Version | |
local.contributor.affiliation | Aoki, Wako, National Astronomical Observatory of Japan | |
local.contributor.affiliation | Honda, Satoshi, National Astronomical Observatory of Japan | |
local.contributor.affiliation | Beers, Timothy C, Michigan State University | |
local.contributor.affiliation | Takada-Hidai, Masahide, Tokai University | |
local.contributor.affiliation | Iwamoto, Nobuyuki, National Astronomical Observatory of Japan | |
local.contributor.affiliation | Tominaga, Nozomu, University of Tokyo | |
local.contributor.affiliation | Umeda, Hideyuki, University of Tokyo | |
local.contributor.affiliation | Nomoto, Ken'ichi, University of Tokyo | |
local.contributor.affiliation | Norris, John, College of Physical and Mathematical Sciences, ANU | |
local.contributor.affiliation | Ryan, Sean G, Open University | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.issue | 1 | |
local.bibliographicCitation.startpage | 747 | |
local.bibliographicCitation.lastpage | 761 | |
local.identifier.doi | 10.1086/512601 | |
dc.date.updated | 2015-12-07T10:55:26Z | |
local.identifier.scopusID | 2-s2.0-34249040840 | |
Collections | ANU Research Publications |
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