Other
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...185.3306w&link_type=abstract
American Astronomical Society, 185th AAS Meeting, #33.06; Bulletin of the American Astronomical Society, Vol. 26, p.1362
Other
Scientific paper
Analysis of the evolution of radio emission from supernovae indicates that systematics exist which can be used to define the supernova type and a relative radio luminosity, using only the spectral and temporal radio behavior. The availability of a radio luminosity estimate then allows relative distance estimates to be made for the radio supernovae, independent of measurements or assumptions made at other wavelengths. When combined with independent distance information, absolute luminosities and distances for all radio supernovae and their parent galaxies can be estimated. In particular, we have found that, based on four objects, Type Ib/c supernovae may be approximate radio ``standard candles,'' with a 6 cm peak luminosity of ~ 10(27) erg s(-1) Hz(-1) . Type II supernovae have a large range of properties, but appear to obey a relation L_6\ cm\ max =~ 4 times 10(22) (t_6\ cm\ max - t_0)(1.8) , where L_6\ cm\ max is the peak 6 cm luminosity in erg s(-1) Hz(-1) of the supernova at time t_6\ cm\ max and t_0 is the date of explosion. If these relations are supported by further observations, they provide the first possibility for distance determinations solely from radio continuum observations. With currently available sensitivity of the Very Large Array (VLA), it should be possible, with diligent effort, to extend such radio supernova distance determinations beyond the Virgo Cluster to ~ 100 Mpc.
Panagia Nino
Sramek Richard A.
Van Dyk Schuyler D.
Weiler Kurt W.
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