NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-22 T04:21:46 PDT
Help | Comment | NED Home

For refcode 2002ApJ...573..306E:
Retrieve 110 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2002ApJ...573..306E A Search for Radio Emission from Supernovae with Ages from about 1 Week to More than 80 Years Christopher R. Eck, John J. Cowan, and David Branch Department of Physics and Astronomy, University of Oklahoma, Norman, OK 73019; christopher_r_eck@raytheon.com, cowan@mail.nhn.ou.edu, branch@mail.nhn.ou.edu Received 1998 November 2; accepted 2002 March 10 ABSTRACT We report Very Large Array radio observations of 29 supernovae (SNe) with ages ranging from 10 days to about 90 yr past explosion. These observations significantly contribute to the existing data pool on such objects. Included are detections of known radio SNe 1950B, 1957D, 1970G, and 1983N, the suspected radio SN 1923A, and the possible radio SN 1961V. None of the remaining 23 observations resulted in detections, providing further evidence to support the observed trend that most SNe are not detectable radio emitters. To investigate the apparent lack of radio emission from the SNe reported here, we have followed standard practice and used Chevalier's "standard model" to derive (upper limits to) the mass-loss rates for the supernova progenitors. These upper limits to the fluxes are consistent with a lack of circumstellar material needed to provide detectable radio emission for SNe at these ages and distances. Comparison of the radio luminosities of these supernovae as a function of age past explosion to other well-observed radio SNe indicates that the Type II SNe upper limits are more consistent with the extrapolated light curves of SN 1980K than of SN 1979C, suggesting that SN 1980K may be a more typical radio emitter than SN 1979C. For completeness, we have included an appendix where the results of analyses of the non-SN radio sources are presented. Where possible, we make (tentative) identifications of these sources using various methods. Subject headings: circumstellar matter - radio continuum: stars - supernovae: general
Retrieve 110 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home