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Radio and x ray observations of sn 2006jd: another strongly interacting type iin supernova
Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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2012 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 755, no 2, 110- p.Article in journal (Refereed) Published
Abstract [en]

We report four years of radio and X-ray monitoring of the Type IIn supernova SN 2006jd at radio wavelengths with the Very Large Array, Giant Metrewave Radio Telescope, and Expanded Very Large Array; at X-ray wavelengths with Chandra, XMM-Newton, and Swift-XRT. We assume that the radio and X-ray emitting particles are produced by shock interaction with a dense circumstellar medium. The radio emission shows an initial rise that can be attributed to free-free absorption by cool gas mixed into the nonthermal emitting region; external free-free absorption is disfavored because of the shape of the rising light curves and the low gas column density inferred along the line of sight to the emission region. The X-ray luminosity implies a preshock circumstellar density similar to 10(6) cm(-3) at a radius r similar to 2 x 10(16) cm, but the column density inferred from the photoabsorption of X-rays along the line of sight suggests a significantly lower density. The implication may be an asymmetry in the interaction. The X-ray spectrum shows Fe line emission at 6.9 keV that is stronger than is expected for the conditions in the X-ray emitting gas. We suggest that cool gas mixed into the hot gas plays a role in the line emission. Our radio and X-ray data both suggest the density profile is flatter than r(-2) because of the slow evolution of the unabsorbed emission.

Place, publisher, year, edition, pages
2012. Vol. 755, no 2, 110- p.
Keyword [en]
circumstellar matter, hydrodynamics, radio continuum: general, stars: mass-loss, supernovae: general, supernovae: individual (SN 2006jd)
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-82392DOI: 10.1088/0004-637X/755/2/110ISI: 000307791400027OAI: diva2:567600


Available from: 2012-11-13 Created: 2012-11-13 Last updated: 2012-11-13Bibliographically approved

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Fransson, Claes
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