2007ApJ...660..747A


Query : 2007ApJ...660..747A

2007ApJ...660..747A - Astrophys. J., 660, 747-761 (2007/May-1)

Spectroscopic studies of extremely metal-poor stars with the Subaru high-dispersion spectrograph. IV. The α-element-enhanced metal-poor star BS 16934-002.

AOKI W., HONDA S., BEERS T.C., TAKADA-HIDAI M., IWAMOTO N., TOMINAGA N., UMEDA H., NOMOTO K., NORRIS J.E. and RYAN S.G.

Abstract (from CDS):

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.

Abstract Copyright:

Journal keyword(s): Nuclear Reactions, Nucleosynthesis, Abundances - Stars: Abundances - stars: individual (BS 16934-002) - Stars: Population II - Stars: Supernovae: General

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 BPS BS 16934-0002 Pe* 13 29 46.5066859200 +16 15 45.145424556   13.733 12.819 12.239 11.670 ~ 17 0
2 HD 122563 Pe* 14 02 31.8455084952 +09 41 09.944391876 7.47 7.10 6.19 5.37 4.79 G8:III:Fe-5 800 0
3 BPS CS 29498-0043 Pe* 21 03 52.1197651440 -29 42 50.344181712   14.8 13.72 13.013 12.406 CEMP-no 91 0
4 SN 2001ig SN* 22 57 30.69 -41 02 25.9     14.5     SNIIb 158 1
5 HE 2323-0256 Pe* 23 26 29.8073738880 -02 39 58.036383180   15.12 14.36   13.358 CEMP-no 175 0

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2022.08.10-19:51:23

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