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The type IIP supernova 2012aw in M95: hydrodynamical modeling of the photospheric phase from accurate spectrophotometric monitoring

Dall'Ora, M., Botticella, M. T., Pumo, M. L., Zampieri, L., Tomasella, L., Pignata, G., Bayless, A. J., Pritchard, T. A., Taubenberger, S., Kotak, R., Inserra, C. ORCID:, Della Valle, M., Cappellaro, E., Benetti, S., Benitez, S., Bufano, F., Elias-Rosa, N., Fraser, M., Haislip, J. B., Harutyunyan, A., Howell, D. A., Hsiao, E. Y., Iijima, T., Kankare, E., Kuin, P., Maund, J. R., Morales-Garoffolo, A., Morrell, N., Munari, U., Ochner, P., Pastorello, A., Patat, F., Phillips, M. M., Reichart, D., Roming, P. W. A., Siviero, A., Smartt, S. J., Sollerman, J., Taddia, F., Valenti, S. and Wright, D. 2014. The type IIP supernova 2012aw in M95: hydrodynamical modeling of the photospheric phase from accurate spectrophotometric monitoring. Astrophysical Journal 787 (2) , 139. 10.1088/0004-637X/787/2/139

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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 56Ni 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 ~ 20 M ☉, progenitor radius R ~ 3 × 1013 cm (~430 R ☉), explosion energy E ~ 1.5 foe, and initial 56Ni mass ~0.06 M ☉. 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 ☉ of the Type IIP events.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: American Astronomical Society
ISSN: 0004-637X
Date of First Compliant Deposit: 24 January 2019
Date of Acceptance: 2 April 2014
Last Modified: 11 Oct 2023 16:44

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