Using Radio and X-ray Observations to Explore Supernovae with Evolving Optical Classifications

Details Using Radio and X-ray Observations to Explore Supernovae with Evolving Optical Classifications Using Radio and X-ray Observations to Explore Supernovae with Evolving Optical Classifications

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543024s&link_type=abstract

American Astronomical Society, AAS Meeting #215, #430.24; Bulletin of the American Astronomical Society, Vol. 42, p.360

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the results of observations of the radio and X-ray emission from type IIb supernova (SN) 2008ax, from March 2008 through October 2008, the type Ic SN 1996aq, from October 1996 through October 2009, and the type Ic SN 2004dk, from August 2004 through October 2009. The data were obtained using the Very Large Array at wavelengths of 1.3 cm (22 GHz), 2 cm, 3.6 cm, 6 cm, and 20 cm (1.5 GHz), while the X-ray data was obtained with the Swift X-Ray Telescope. SN 2008ax was discovered in the optical early enough that it was possible to obtain data during the early radio "turn-on" which are important for estimating the local circumstellar medium (CSM) properties. We present the results of our analysis and discuss the possibility of the progenitor star being in a binary system. SNe 1996aq and 2004dk were both the subject of radio searches immediately following optical discovery. SN 1996aq was not detected after an exhaustive search while SN 2004dk was monitored for six months before fading. We report the detection and evolution of late-time radio emission for these two type Ic SNe. These supernovae appear to be evolving similarly to SNe 1996cr and 2001em. SN 2001em was originally classified as type Ic, but is now classified as a type IIn SN, typified by dense CSM. Supernovae 1996aq , 2004dk, and 2008ax have all demonstrated an evolution in their optical classification. We will explore this evolution from the radio/X-Ray perspective.

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