Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...177l..25p&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 177, no. 1-2, May 1987, p. L25-L28.
Astronomy and Astrophysics
Astrophysics
45
Astronomical Photometry, Magellanic Clouds, Supernova 1987A, Ultraviolet Photometry, Iue, Supergiant Stars
Scientific paper
The authors find that the UV flux of SN 1987A declines since the very first IUE observation at a rate which is faster at shorter wavelengths while the emission around 5100 Å increases slowly but steadily with time. Thus, the UV radiation dominates the overall emission at early phases but becomes completely negligible at later phases. Such an evolution can be explained in terms of a Type II event with an initial compact configuration. The authors also discuss briefly the properties of two stars which can be detected with the SWP camera when the SN fades down. It turns out that none of them can readily be identified with Sk -69°202, the B3 supergiant which conincide positionally with the SN, unless that star has a peculiar UV spectrum for its spectral type. This suggests that Sk -69°202 may indeed be the SN progenitor.
Barylak Michael
Clavel Jean
de Cordoba Sanz Fernandez L.
Gilmozzi Robert
González-Riestra Rosario
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