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Theoretical oscillator strengths for Sr II and Y III, with application to abundances in the HgMn-type star chi Lupi

Brage, Tomas LU ; Wahlgren, Glenn LU ; Johansson, Sveneric LU ; Leckrone, DS and Proffitt, CR (1998) In Astrophysical Journal 496(2). p.1051-1057
Abstract
Oscillator strengths for selected transitions of Sr II and Y III have been determined using ab initio multiconfiguration Hartree-Fock techniques. The importance of including an accurate treatment of the core-valence correlation is emphasized. The results are used to determine the abundances of Sr and Y in the chemically peculiar star chi Lupi from HST/GHRS Echelle spectra. Overabundances of 2.09 dex for Sr and 2.8 dex for Y relative to the solar abundance are derived, and an ionization imbalance of +1.1 dex is evident from abundance determinations using Y III and Y II.
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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
atomic data, abundances, stars, individual (chi Lupi)
in
Astrophysical Journal
volume
496
issue
2
pages
1051 - 1057
publisher
American Astronomical Society
external identifiers
  • wos:000073048100041
  • scopus:0001711824
ISSN
0004-637X
DOI
10.1086/305401
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Lund Observatory (000006111), Science (000006100), Physics, science (011013100)
id
18306a42-0294-433b-93f3-5dfe0dd20fa5 (old id 3919525)
date added to LUP
2016-04-01 16:42:24
date last changed
2020-12-15 01:53:41
@article{18306a42-0294-433b-93f3-5dfe0dd20fa5,
  abstract     = {Oscillator strengths for selected transitions of Sr II and Y III have been determined using ab initio multiconfiguration Hartree-Fock techniques. The importance of including an accurate treatment of the core-valence correlation is emphasized. The results are used to determine the abundances of Sr and Y in the chemically peculiar star chi Lupi from HST/GHRS Echelle spectra. Overabundances of 2.09 dex for Sr and 2.8 dex for Y relative to the solar abundance are derived, and an ionization imbalance of +1.1 dex is evident from abundance determinations using Y III and Y II.},
  author       = {Brage, Tomas and Wahlgren, Glenn and Johansson, Sveneric and Leckrone, DS and Proffitt, CR},
  issn         = {0004-637X},
  language     = {eng},
  number       = {2},
  pages        = {1051--1057},
  publisher    = {American Astronomical Society},
  series       = {Astrophysical Journal},
  title        = {Theoretical oscillator strengths for Sr II and Y III, with application to abundances in the HgMn-type star chi Lupi},
  url          = {http://dx.doi.org/10.1086/305401},
  doi          = {10.1086/305401},
  volume       = {496},
  year         = {1998},
}