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

G. Ljung; H. Nilsson; M. Asplund; S. Johansson

doi:10.1051/0004-6361:20065212

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

G. Ljung^*, H. Nilsson, M. Asplund, S. Johansson

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

106 Citations (Scopus)

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 A 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 ID 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 ε_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.

Original language	English
Pages (from-to)	1181-1185
Number of pages	5
Journal	Astronomy and Astrophysics
Volume	456
Issue number	3
DOIs	https://doi.org/10.1051/0004-6361:20065212
Publication status	Published - Sept 2006

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title = "New and improved experimental oscillator strengths in Zr II and the solar abundance of zirconium",

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 A 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 ID 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 εZr = 2.58 ±0.02 when using a 3D hydrodynamical solar model atmosphere. The new value is in excellent agreement with the meteoritic Zr abundance.",

keywords = "Atomic data, Line: identification, Methods: laboratory, Sun: abundances",

author = "G. Ljung and H. Nilsson and M. Asplund and S. Johansson",

year = "2006",

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doi = "10.1051/0004-6361:20065212",

language = "English",

volume = "456",

pages = "1181--1185",

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TY - JOUR

T1 - New and improved experimental oscillator strengths in Zr II and the solar abundance of zirconium

AU - Ljung, G.

AU - Nilsson, H.

AU - Asplund, M.

AU - Johansson, S.

PY - 2006/9

Y1 - 2006/9

N2 - 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 A 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 ID 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 εZr = 2.58 ±0.02 when using a 3D hydrodynamical solar model atmosphere. The new value is in excellent agreement with the meteoritic Zr abundance.

AB - 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 A 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 ID 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 εZr = 2.58 ±0.02 when using a 3D hydrodynamical solar model atmosphere. The new value is in excellent agreement with the meteoritic Zr abundance.

KW - Atomic data

KW - Line: identification

KW - Methods: laboratory

KW - Sun: abundances

UR - http://www.scopus.com/inward/record.url?scp=33748935293&partnerID=8YFLogxK

U2 - 10.1051/0004-6361:20065212

DO - 10.1051/0004-6361:20065212

M3 - Article

SN - 0004-6361

VL - 456

SP - 1181

EP - 1185

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 3

ER -

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

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