Supernova 1987A - Analysis of UV absorption spectra obtained with the Astron station

Details Supernova 1987A - Analysis of UV absorption spectra obtained with the Astron station Supernova 1987A - Analysis of UV absorption spectra obtained with the Astron station

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990azh....67..480l&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 67, May-June 1990, p. 480-493. In Russian.

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Absorption Spectra, Near Ultraviolet Radiation, Spaceborne Astronomy, Supernova 1987A, Ultraviolet Spectra, Annual Variations, Computational Astrophysics, Satellite Observation, Ultraviolet Astronomy

Scientific paper

Absorption spectra of SN 1987 in the near-UV region, obtained with the Astron station 9 to 394 days after the explosion, are examined. It is shown that, in the envelope, the ionization of Fe I atoms and probably other elements of the iron group is considerably weaker than the equilibrium ionization, and that such overionization leads to a strong weakening of lines of neutral atoms. Synthetic spectra computations indicate that absorption blends at 3350, 3230, and 3080 A, which are the most marked features in the observed spectra, are formed by the lines of the first Ti II multiplets.

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