Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...337l..85b&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 337, Feb. 15, 1989, p. L85-L88.
Astronomy and Astrophysics
Astronomy
18
Brightness Distribution, Radio Spectra, Supernovae, Very Long Base Interferometry, Anisotropy, Astronomical Models, Radio Sources (Astronomy), Stellar Envelopes
Scientific paper
The 1987.4 radio brightness distribution at 5 GHz of the unusual supernova SN 1986J can be described by an elliptical Gaussian model with a half-width at half-maximum of the major axis of 0.80 + or - 0.12 mas and a ratio between the minor axis and the major axis of 0.62 + or - 0.12. This result could be due to an anisotropic flow pattern of the expanding gas and/or to peculiar variations of the brightness across the emission region. We discuss the implications of these possibilities for the understanding of the explosion process, the density distribution of the ambient medium, and the brightness distribution of a possible pulsar nebula.
Bartel Norbert
Rupen Michael R.
Shapiro Irwin I.
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