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New and improved experimental oscillator strengths in ZrII and the solar abundance of zirconium

Ljung, Gunilla LU ; Nilsson, Hampus LU ; Asplund, M and Johansson, Sveneric LU (2006) In Astronomy & Astrophysics 456(3). p.167-1181
Abstract
Using the Fourier Transform Spectrometer at Lund Observatory, intensity calibrated spectra of singly ionized zirconium have been recorded and analyzed. Oscillator strengths for 263 Zr II spectral lines in the region 2500-5400 angstrom have been derived by combining new experimental branching fractions with previously measured radiative lifetimes. The transitions combine 34 odd parity levels with 29 low metastable levels between 0 and 2.4 eV. The experimental branching fractions have been compared with theoretical values and the oscillator strengths with previously published data when available. The oscillator strengths have been employed to derive the solar photospheric Zr abundance based on both 1D and 3D model atmospheres. Based on the... (More)
Using the Fourier Transform Spectrometer at Lund Observatory, intensity calibrated spectra of singly ionized zirconium have been recorded and analyzed. Oscillator strengths for 263 Zr II spectral lines in the region 2500-5400 angstrom have been derived by combining new experimental branching fractions with previously measured radiative lifetimes. The transitions combine 34 odd parity levels with 29 low metastable levels between 0 and 2.4 eV. The experimental branching fractions have been compared with theoretical values and the oscillator strengths with previously published data when available. The oscillator strengths have been employed to derive the solar photospheric Zr abundance based on both 1D and 3D model atmospheres. Based on the seven best and least perturbed Zr II lines in the solar disk-center spectrum, we determine the solar Zr abundance to log epsilon(Zr) = 2.58 +/- 0.02 when using a 3D hydrodynamical solar model atmosphere. The new value is in excellent agreement with the meteoritic Zr abundance. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
methods : laboratory, Sun :, atomic data, abundances, line : identification
in
Astronomy & Astrophysics
volume
456
issue
3
pages
167 - 1181
publisher
EDP Sciences
external identifiers
  • wos:000240370100036
  • scopus:33748935293
ISSN
0004-6361
DOI
10.1051/0004-6361:20065212
language
English
LU publication?
yes
id
8c83cb8e-a013-412c-9cc5-4a10df67bcee (old id 394283)
date added to LUP
2016-04-01 16:11:59
date last changed
2021-10-10 03:21:34
@article{8c83cb8e-a013-412c-9cc5-4a10df67bcee,
  abstract     = {Using the Fourier Transform Spectrometer at Lund Observatory, intensity calibrated spectra of singly ionized zirconium have been recorded and analyzed. Oscillator strengths for 263 Zr II spectral lines in the region 2500-5400 angstrom have been derived by combining new experimental branching fractions with previously measured radiative lifetimes. The transitions combine 34 odd parity levels with 29 low metastable levels between 0 and 2.4 eV. The experimental branching fractions have been compared with theoretical values and the oscillator strengths with previously published data when available. The oscillator strengths have been employed to derive the solar photospheric Zr abundance based on both 1D and 3D model atmospheres. Based on the seven best and least perturbed Zr II lines in the solar disk-center spectrum, we determine the solar Zr abundance to log epsilon(Zr) = 2.58 +/- 0.02 when using a 3D hydrodynamical solar model atmosphere. The new value is in excellent agreement with the meteoritic Zr abundance.},
  author       = {Ljung, Gunilla and Nilsson, Hampus and Asplund, M and Johansson, Sveneric},
  issn         = {0004-6361},
  language     = {eng},
  number       = {3},
  pages        = {167--1181},
  publisher    = {EDP Sciences},
  series       = {Astronomy & Astrophysics},
  title        = {New and improved experimental oscillator strengths in ZrII and the solar abundance of zirconium},
  url          = {http://dx.doi.org/10.1051/0004-6361:20065212},
  doi          = {10.1051/0004-6361:20065212},
  volume       = {456},
  year         = {2006},
}