Letter to the editor (Scientific journals)
Barium isotopes in the very metal-poor star HD 140283
Magain, Pierre; Zhao, G.
1993In Astronomy and Astrophysics, 268, p. 27-L29
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Keywords :
BARIUM; STELLAR COMPOSITION; GALACTIC EVOLUTION; LINE SPECTRA; METALLICITY; RESONANCE LINES
Abstract :
[en] The fractions of odd and even isotopes of barium in the metal-poor star HD140283 are determined from an analysis of the profile of the Ba II resonance line, taking advantage of the differences in hyperfine structure splitting between the different isotopes. Although one would expect an increased contribution of the r-process in very metal-poor stars, it is found that the isotopic ratio is very close to solar.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Magain, Pierre  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Zhao, G.;  Beijing Astronomical Observatory, China
Language :
English
Title :
Barium isotopes in the very metal-poor star HD 140283
Publication date :
01 February 1993
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
268
Pages :
L27-L29
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 01 February 2010

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