Using SN 1987A light echoes to determine mass loss from the progenitor

Details Using SN 1987A light echoes to determine mass loss from the progenitor Using SN 1987A light echoes to determine mass loss from the progenitor

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...366l..73c&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 366, Jan. 10, 1991, p. L73-L77.

Astronomy and Astrophysics

Astrophysics

34

Emission Spectra, Missing Mass (Astrophysics), Stellar Envelopes, Supernova 1987A, Echoes, Light (Visible Radiation), Red Giant Stars, Stellar Winds

Scientific paper

The hypothesis that the blue progenitor of SN 1987A passed through a blue supergiant phase ending with the expulsion of the outer envelope is tested. The many light echoes seen near SN 1987A were used to search for a mass flow from the progenitor and for abrupt density changes at the limits of this smooth mass flow. The progenitor needed roughly a million yr to create these structures, assuming a constant mass loss at 15 km/s. The dust in the region is small-grained and isotropically scattering. Interaction between the progenitor blue supergiant and red supergiant winds is probably contained within a roughly spherical structure 1.5 pc in diameter.

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