Other
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21110521s&link_type=abstract
American Astronomical Society, AAS Meeting #211, #105.21; Bulletin of the American Astronomical Society, Vol. 39, p.932
Other
1
Scientific paper
We present the results of observations of the radio emission from Supernova (SN) 2004et from 2004 September 30 through 2007 June 29 and Supernova 2002hh from 2002 October 31 to 2007 June 29. The data were obtained using the Very Large Array at wavelengths of .8 cm, 1.3 cm, 2 cm, 3.6 cm, 6 cm, and 20 cm (1.5 GHz). In addition, several observations have been provided by the MERLIN telescope at 6 cm and one GMRT upperlimit at 21 cm. Both supernovae were discovered in the optical early enough that it was possible to obtain many of the early radio "turn-on" measurements which are important for estimating the local circumstellar medium (CSM) properties. SN 2002hh is well modeled throughout. It is characterized by a "clumpy" CSM. We do not detect the dust shell surrounding SN 2002hh that has been previously detected in other wavelengths. The radio light curves of SN 2004et resemble those of SN 1980K. The radio observations are well modeled through day 400 at which point the light curve suddenly and dramatically breaks. Because SNe 2002hh and 2004et are at the same distance and are both IIP SNe, they can be useful in determining characteristics of IIP SNe without the added complication of correcting for differences in distance. The two SNe have similar mass loss rates, are both best described by a sparse, clumpy medium.
Kelley Thomas M.
Panagia Nino
Sramek Richard A.
Stockdale Christopher
Weiler Kurt W.
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