Strong absorption lines in the spectrum of the supernova 1987A during the first months after the outburst - Variations of lines of heavy elements

Details Strong absorption lines in the spectrum of the supernova 1987A during the first months after the outburst - Variations of lines of heavy elements Strong absorption lines in the spectrum of the supernova 1987A during the first months after the outburst - Variations of lines of heavy elements

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991azh....68.1261l&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 68, Nov.-Dec. 1991, p. 1261-1273. In Russian.

Astronomy and Astrophysics

Astronomy

Absorption Spectra, Heavy Elements, Line Spectra, Stellar Spectra, Supernova 1987A, Balmer Series, Radial Velocity, Spectral Line Width, Stellar Envelopes, Ultraviolet Spectra

Scientific paper

Variations of equivalent widths W-lambda and depths d-lambda for Ti II, Fe II, Ba II, and Na I absorption lines during the first months after the explosion of SN 1987A are analyzed. It is shown that the fall of the envelope temperature gave way at a certain stage to a rise in temperature, and that this led to a dramatic change in the W-lambda(t) and d-lambda(t) curves. Rough estimates show that the observed weakening of the Ba II lambda 6142 line and the approximate constancy of the Fe II lambda 5169 line in the interval t = 25-120 d is due to a temperature rise of 1500 K.

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