Radio supernovae in a cloudy wind

Details Radio supernovae in a cloudy wind Radio supernovae in a cloudy wind

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999arep...43...89c&link_type=abstract

Astronomy Reports, Volume 43, Issue 2, February 1999, pp.89-93

Astronomy and Astrophysics

Astronomy

4

Scientific paper

A model for the radio evolution of supernovae in a cloudy wind is proposed. We demonstrate that free-free absorption in a cloudy wind can account for the anomalous evolution of the powerful radio supernova SN 1986J without invoking a speculative "mixed absorber." The required mass-loss rate of the wind is ~10^-4 M_solar yr^-1 if the wind velocity is 10 km s^-1. However, a higher average wind density cannot be excluded, since some fraction of the wind material may be in the form of dense clouds with low transparency. The evolution of another powerful radio supernova, SN 1988Z, can be explained using a standard model with a smooth wind with a mass-loss rate of 1.4 ~10^-4 M_solar yr^-1. This result, together with the fact that optical spectra indicate the wind around this supernova to be clumpy, implies that the cloudy component of the wind of SN 1988Z is characterized by a lower transparency than that of SN 1986J.

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