Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992natur.355..617c&link_type=abstract
Nature (ISSN 0028-0836), vol. 355, Feb. 13, 1992, p. 617, 618. Research supported by NASA.
Astronomy and Astrophysics
Astronomy
35
Radio Sources (Astronomy), Stellar Models, Supernova Remnants, Supernova 1987A, Brightness Temperature, Radio Emission, Supergiant Stars
Scientific paper
The recently observed rise in radio flux from SN1987A is earlier than predicted in models of the interaction with the observed line-emitting gas. The observed size of the radio source is roughly consistent with the expected position of the SN shock wave and the position of the termination shock of the blue supergiant progenitor wind. The radio increase is attributed to the interaction of the SN shock with this density jump. The required efficiency of electron acceleration and magnetic field amplification is larger than usually occurs in SNe and SNR. Possible reasons for the enhanced radio emission are particle acceleration by the weak reflected shock that travels through the interaction region, and the action of the Richtmyer-Meshkov instability near the initial termination-shock density jump. The action of these mechanisms is time-limited; the prediction of this model is that the radio flux should begin to decline within the next year.
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