Solar photospheric abundance of iridium

Details Solar photospheric abundance of iridium Solar photospheric abundance of iridium

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...203..378y&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 203, no. 2, Sept. 1988, p. 378-380.

Astronomy and Astrophysics

Astrophysics

5

Abundance, Iridium, Photosphere, Solar Spectra, Oscillator Strengths, Solar Flux, Spectral Line Width, Thermodynamic Equilibrium

Scientific paper

The spectral-synthesis method described by Ross and Aller (1968) is applied, assuming LTE, to estimate the Ir abundance in the solar photosphere on the basis of (1) a very-high-resolution low-noise solar UV spectrum obtained at the Jungfraujoch observatory and (2) oscillator strengths determined from the LIF branching ratios and radiative lifetimes of Gough et al. (1983). The observed and calculated spectra are presented graphically, and the abundance, on a scale where log A(H) = 12, is found to be A(Ir) = 1.38 + or - 0.05 similar to that found in meteorites.

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