Chandra, Poonam ; Stockdale, Christopher J. ; Chevalier, Roger A. ; Van Dyk, Schuyler D. ; Ray, Alak ; Kelley, Matthew T. ; Weiler, Kurt W. ; Panagia, Nino ; Sramek, Richard A. (2008) ELEVEN YEARS OF RADIO MONITORING OF THE TYPE IIn SUPERNOVA SN 1995N The Astrophysical Journal, 690 (2). pp. 1839-1846. ISSN 0004-637X
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Official URL: http://doi.org/10.1088/0004-637X/690/2/1839
Related URL: http://dx.doi.org/10.1088/0004-637X/690/2/1839
Abstract
We present radio observations of the optically bright Type IIn supernova SN 1995N. We observed the SN at radio wavelengths with the Very Large Array for 11 years. We also observed it at low radio frequencies with the Giant Metrewave Radio Telescope at various epochs within 6.5 − 10 years since explosion. Although there are indications of an early optically thick phase, most of the data are in the optically thin regime so it is difficult to distinguish between synchrotron self absorption and free–free absorption (FFA) mechanisms. However, the information from other wavelengths indicates that FFA is the dominant absorption process. Model fits of radio emission with FFA give reasonable physical parameters. Making use of X-ray and optical observations, we derive the physical conditions of the shocked ejecta and the shocked circumstellar matter.
Item Type: | Article |
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Source: | Copyright of this article belongs to IOP Publishing |
Keywords: | circumstellar matter; radiation mechanisms: non-thermal; radio continuum: stars; stars: mass loss; supernovae: individual: SN 1995N; Astrophysics |
ID Code: | 125907 |
Deposited On: | 17 Oct 2022 08:59 |
Last Modified: | 17 Oct 2022 08:59 |
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