The H-alpha flux in SN 1987A during the first 111 D

Details The H-alpha flux in SN 1987A during the first 111 D The H-alpha flux in SN 1987A during the first 111 D

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.238p..15t&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 238, May 1, 1989, p. 15P-23P.

Astronomy and Astrophysics

Astronomy

5

Flux Quantization, H Alpha Line, Spectral Line Width, Supernova 1987A, Stellar Envelopes, Stellar Evolution

Scientific paper

Accurate fluxes and equivalent widths are presented for the H-alpha line in the spectrum of SN 1987A, covering the period between February 25 and June 14, 1987. Four well-defined phases in H-alpha flux evolution are observed, with transitions 4.4 + or - 1.1, 21.4 + or - 1.3, and 93 + or - 5 days after explosion. The mass of hydrogen passing through the photosphere until day 21.4 is estimated at 1.3 + or - 0.3 solar masses. The approximate thickness of the H-alpha emitting shell is found to be 1-5 percent of the corresponding photospheric radius.

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