Immler, S. and Modjaz, M. and Landsman, W. and Bufano, F. and Brown, P. J. and Milne, P. and Dessart, L. and Holland, S. T. and Koss, M. and Pooley, D. and Kirshner, R. P. and Filippenko, A. V. and Panagia, N. and Chevalier, R. A. and Mazzali, P. A. and Gehrels, N. and Petre, R. and Burrows, D. N. and Nousek, J. A. and Roming, P. W. A. and Pian, E. and Soderberg, A. M. and Greiner, J. (2008) Swift and Chandra detections of supernova 2006jc: evidence for interaction of the supernova shock with a circumstellar shell. Astrophysical Journal Letters, 674 (2). L85-L88. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:20090526-144731613
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The peculiar Type Ib supernova (SN) 2006jc has been observed with the UV/Optical Telescope (UVOT) and X-Ray Telescope (XRT) on board the Swift observatory over a period of 19-183 days after the explosion. Signatures of interaction of the outgoing SN shock with dense circumstellar material (CSM) are detected, such as strong X-ray emission (L_(0.2–10) > 10^39 erg s^−1) and the presence of Mg II 2800 Å line emission visible in the UV spectra. In combination with a Chandra observation obtained on day 40 after the explosion, the X-ray light curve is constructed, which shows a unique rise of the X-ray emission by a factor of ~5 over a period of ~4 months, followed by a rapid decline. We interpret the unique X-ray and UV properties as a result of the SN shock interacting with a shell of material that was deposited by an outburst of the SN progenitor 2 years prior to the explosion. Our results are consistent with the explosion of a Wolf-Rayet star that underwent an episodic mass ejection qualitatively similar to those of luminous blue variable stars prior to its explosion. This led to the formation of a dense (~10^7 cm^−3) shell at a distance of ~10^16 cm from the site of the explosion, which expands with the WR wind at a velocity of 1300 ± 300 km s^−1.
|Additional Information:||© 2008 The American Astronomical Society. Received 2007 July 12; accepted 2008 January 9; published 2008 January 22. We gratefully acknowledge financial support of the NSF and NASA, especially the Swift and Chandra Guest Investigator Programs.|
|Subject Keywords:||circumstellar matter; supernovae: individual (SN 2006jc); X-rays: general; X rays: individual (SN 2006jc); X rays: ISM; ultraviolet: ISM|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||27 May 2009 16:37|
|Last Modified:||26 Dec 2012 11:01|
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