Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pazh...16..790s&link_type=abstract
Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 16, Sept. 1990, p. 790-798. In Russian. In Russian.
Astronomy and Astrophysics
Astronomy
2
Astronomical Spectroscopy, Radio Emission, Self Absorption, Supernovae, Synchrotron Radiation, Brightness Distribution, Linear Polarization, Stellar Envelopes, Stellar Spectra
Scientific paper
It is suggested that synchrotron self-absorption may be responsible for the low frequency cut-off in the spectrum of radio emission from supernovae. It is reported that the angular size estimated according to synchrotron self-absorption coincides within the error limits with the angular size in four out of six supernovae studied. The angular size determined through self-absorption for two cases of type Ib supernovae is reported to be 5-7 times lower than the angular size corresponding to the envelope expansion velocity. It is suggested that the discrepancy can be removed by an assumption that the radio-envelope expansion velocity significantly exceeds the optical-envelope expansion velocity. A prediction is made concerning the specific behavior of the degree and position angle of the linear polarization of supernovae radio emission.
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