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THE TYPE IIP SUPERNOVA 2012aw IN M95: HYDRODYNAMICAL MODELING OF THE PHOTOSPHERIC PHASE FROM ACCURATE SPECTROPHOTOMETRIC MONITORING
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2014 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 787, no 2, 139- p.Article in journal (Refereed) Published
Abstract [en]

We present an extensive optical and near-infrared photometric and spectroscopic campaign of the Type IIP supernova SN 2012aw. The data set densely covers the evolution of SN 2012aw shortly after the explosion through the end of the photospheric phase, with two additional photometric observations collected during the nebular phase, to fit the radioactive tail and estimate the Ni-56 mass. Also included in our analysis is the previously published Swift UV data, therefore providing a complete view of the ultraviolet-optical-infrared evolution of the photospheric phase. On the basis of our data set, we estimate all the relevant physical parameters of SN 2012aw with our radiation-hydrodynamics code: envelope mass M-env similar to 20 M-circle dot, progenitor radius R similar to 3 x 10(13) cm (similar to 430 R-circle dot), explosion energy E similar to 1.5 foe, and initial Ni-56 mass similar to 0.06 M-circle dot. These mass and radius values are reasonably well supported by independent evolutionary models of the progenitor, and may suggest a progenitor mass higher than the observational limit of 16.5 +/- 1.5 M-circle dot of the Type IIP events.

Place, publisher, year, edition, pages
2014. Vol. 787, no 2, 139- p.
Keyword [en]
galaxies: individual (M95), supernovae: general, supernovae: individual (2012aw)
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-105405DOI: 10.1088/0004-637X/787/2/139ISI: 000336246700044OAI: oai:DiVA.org:su-105405DiVA: diva2:728968
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AuthorCount:41;

Available from: 2014-06-25 Created: 2014-06-24 Last updated: 2017-12-05Bibliographically approved

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Sollerman, JesperTaddia, Francesco
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The Oskar Klein Centre for Cosmo Particle Physics (OKC)Department of Astronomy
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CiteExportLink to record
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