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Issue A&A
Volume 387, Number 1, May III 2002
Page(s) L6 - L9
Section Letters
DOI 10.1051/0004-6361:20020364



A&A 387, L6-L9 (2002)
DOI: 10.1051/0004-6361:20020364

Letter

Detection of the mercapto radical SH in the solar atmosphere

S. V. Berdyugina1 and W. C. Livingston2

1  Astronomy Division, PO Box 3000, 90014 University of Oulu, Finland
2  National Solar Observatory, AURA, PO Box 26732, Tucson, AZ 85726, USA

(Received 15 February 2002 / Accepted 8 March 2002)

Abstract
We analyze new high-resolution UV observations of the solar photosphere in the disk center and the limb and report the first detection of SH lines in the solar atmosphere. We perform a synthesis of the solar spectrum including many atomic and molecular lines and find a few relatively unblended SH lines from which we determine the (0, 0) band oscillator strength $f_=2.2\times10^$. We conclude that these lines are excellent indicators of the sulfur abundance and isotope ratio in G and K stars.


Key words: Sun: abundances -- Sun: photosphere -- molecular data -- line: identification -- techniques: spectroscopic

Offprint request: S. V. Berdyugina, Sveta.Berdyugina@oulu.fi




© ESO 2002


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