The Fading Radio Emission from SN 1961V: Evidence for a Type II Peculiar Supernova?
Abstract
Using the Very Large Array (VLA), we have detected radio emission from the site of SN 1961V in the Sc galaxy NGC 1058. With a peak flux density of 0.063+/-0.008 mJy beam-1 at 6 cm and 0.147+/-0.026 mJy beam-1 at 18 cm, the source is nonthermal, with a spectral index of -0.79+/-0.23. Within errors, this spectral index is the same value reported for previous VLA observations taken in 1984 and 1986. The radio emission at both wavelengths has decayed since the mid-1980s observations with power-law indices of β20cm=-0.69+/-0.23 and β6cm=-1.75+/-0.16. We discuss the radio properties of this source and compare them with those of Type II radio supernovae and luminous blue variables.
- Publication:
-
The Astronomical Journal
- Pub Date:
- July 2001
- DOI:
- 10.1086/321136
- arXiv:
- arXiv:astro-ph/0104235
- Bibcode:
- 2001AJ....122..283S
- Keywords:
-
- galaxies: individual (NGC 1058);
- Galaxies: General;
- Stars: Supernovae: General;
- supernovae: individual (SN 1961V);
- Radio Continuum;
- Astrophysics
- E-Print:
- 19 pages, 3 figures