Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...205..135h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 205, no. 1-2, Oct. 1988, p. 135-146. Research supported by the Ministerium für
Astronomy and Astrophysics
Astrophysics
31
Doppler Effect, Flux Density, Line Spectra, Stellar Spectrophotometry, Supernova 1987A, Gravitational Collapse, Light Sources, Stellar Spectra
Scientific paper
Directly measured and carefully calibrated spectrophotometric fluxes for Supernova 1987 A obtained at 10 A resolution and covering the wavelength range from 3200 to 9000 A are presented for the period February 25 to April 14, 1987, the first 50 days of SN 1987 A. It is demonstrated that the general evolution of both the flux distribution and the line spectrum takes place in two phases. In the first phase, a rapid decrease of UV flux, slow increase of red and near-IR flux, rapid decrease of observed Doppler shifts of spectral lines, and rapid evolution toward a rich absorption and P Cyg-type line spectrum are observed. This phase lasts until approximately March 15, after which date a second phase begins, characterized by a gradual increase of flux at all observed wavelengths, slow decrease of Doppler shifts, and nearly constant line spectrum.
Dachs Joachim
Hanuschik Reinhard W.
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