Publication Date:
2014-04-15
Description:
We report radio observations of two stripped-envelope supernovae (SNe), 2010O and 2010P, which exploded within a few days of each other in the luminous infrared galaxy Arp 299. Whilst SN 2010O remains undetected at radio frequencies, SN 2010P was detected (with an astrometric accuracy better than 1 milli arcsec in position) in its optically thin phase in epochs ranging from ~1 to ~3 yr after its explosion date, indicating a very slow radio evolution and a strong interaction of the SN ejecta with the circumstellar medium. Our late-time radio observations towards SN 2010P probe the dense circumstellar envelope of this SN, and imply $\dot{M} [\,{\rm M_{\odot }\,yr^{-1}}] / v_{\rm {wind}} [10\,\,{\rm km\,s^{-1}}] =(3.0-5.1)$ 10 –5 , with a 5 GHz peak luminosity of ~1.2 10 27 erg s – 1 Hz – 1 on day ~464 after explosion. This is consistent with a Type IIb classification for SN 2010P, making it the most distant and most slowly evolving Type IIb radio SN detected to date.
Print ISSN:
0035-8711
Electronic ISSN:
1365-2966
Topics:
Physics
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