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Date and Time of the Query: 2019-08-21 T16:29:23 PDT
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For refcode 1991ApJ...380..161W:
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Copyright by American Astronomical Society. Reproduced by permission
1991ApJ...380..161W THE 10 YEAR RADIO LIGHT CURVES FOR SN 1979C KURT W. WEILER AND SCHUYLER D. VAN DYK Center for Advanced Space Sensing, Naval Research Laboratory, Code 4215, Washington, DC 20375-5000 NINO PANAGIA Space Telescope Science Institute, 2700 San Martin Drive, Baltimore, MD 21218 RICHARD A. SRAMEK National Radio Astronomy Observatory, Socorro, NM 87801 AND JENNIFER L. DISCENNA Center for Advanced Space Sensing, Naval Research Laboratory, Code 4215, Washington, DC 20375-5000 Received 1991 April 9; accepted 1991 April 23 ABSTRACT We present new observations of the radio supernova SN 1979C made with the VLA at {lambda}{lambda}20, 6, and 2 cm from 1985 March through 1990 December, augmenting our previous observations which began only 8 days after optical maximum in 1979 April and extended through 1984 November. We find that the "mini-shell" model of Chevalier still provides the best representation of these more complete light curves at all three wavelengths. Shorter period fluctuations in the observations are real and are probably due to emission efficiency variations caused by structure in the presupernova stellar wind density. We also find evidence for more than 1 M_sun_ lost from the progenitor star in the presupernova stellar wind. This suggests that the star's mass was originally M_ZAMS_~> 13 M_sun_. These observations represent the longest and most complete data set available for the emission from any supernova in any wavelength band. Subject headings: nebulae: supernovae remnants-stars: individual (SN 1979C) - stars: radio radiation -stars: supernovae
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