A Radio and X-Ray Study of Historical Supernovae in M83

Details A Radio and X-Ray Study of Historical Supernovae in M83 A Radio and X-Ray Study of Historical Supernovae in M83

2005-11-07

arxiv.org/abs/astro-ph/0511202v1

Astron.J.131:889-894,2006

Astronomy and Astrophysics

Astrophysics

3 color ps figures

Scientific paper

10.1086/499401

We report the results of 15 years of radio observations of the six historical supernovae (SNe) in M83 using the Very Large Array. We note the near linear decline in radio emission from SN 1957D, a type II SN, which remains a non-thermal radio emitter. The measured flux densities from SNe 1923A and 1950B have flattened as they begin to fade below detectable limits, also type II SNe. The luminosities for these three SNe are comparable with the radio luminosities of other decades-old SNe at similar epochs. SNe 1945B, 1968L, and 1983N were not detected in the most recent observations and these non-detections are consistent with previous studies. We report the X-ray non-detections of all six historical SNe using the Chandra X-ray Observatory, consistent with previous X-ray searches of other decades-old SNe, and low inferred mass loss rates of the progenitors.

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