Article (Scientific journals)
Transition probabilities and lifetimes in neutral and singly ionized osmium and the Solar osmium abundance
Quinet, Pascal; Palmeri, P.; Biémont, Emile et al.
2006In Astronomy and Astrophysics, 448 (3), p. 1207-U93
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Keywords :
Sun : abundances; atomic data; atomic processes
Abstract :
[en] Radiative lifetime measurements have been performed, with a time-resolved laser-induced fluorescence technique, for 12 levels of Os I and for 9 levels of Os II. For 9 levels of Os I and 4 levels of Os II, there were no previous experimental data available. From a comparison with new theoretical calculations, taking configuration interactions and core-polarization effects into account, it has been possible to deduce oscillator strengths for 129 transitions of Os I and 137 transitions of Os II of astrophysical interest appearing in the wavelength range 180.0-870.0 nm. These results have allowed us to revise the abundance of osmium in the solar photosphere (log epsilon(Os) = 1.25 +/- 0.11). The newly derived oscillator strengths have been applied as well to derive the osmium abundance in the carbon-rich metal-poor star HD 187861.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Quinet, Pascal  ;  Université de Liège - ULiège > Département de physique > Physique nucléaire, atomique et spectroscopie
Palmeri, P.
Biémont, Emile ;  Université de Liège - ULiège > Département de physique > Physique nucléaire, atomique et spectroscopie
Jorissen, A.
Van Eck, S.
Svanberg, S.
Xu, H. L.
Plez, B.
Language :
English
Title :
Transition probabilities and lifetimes in neutral and singly ionized osmium and the Solar osmium abundance
Publication date :
March 2006
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
Edp Sciences S A, Les Ulis Cedex A, France
Volume :
448
Issue :
3
Pages :
1207-U93
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 19 March 2010

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