SN 2009N: linking normal and subluminous Type II-P SNe

Takáts K.; Pumo, ML; Elias-Rosa, N; Pastorello, A; Pignata, G.; Paillas, E; Zampieri, L; Anderson, JP; Vinkó J.; Benetti, S; Botticella, MT; Bufano, F.; Campillay, A; Cartier, R; Ergon, M; et. al.

Abstract

We present ultraviolet, optical, near-infrared photometry and spectroscopy of SN 2009N in NGC 4487. This object is a Type II-P supernova with spectra resembling those of subluminous II-P supernovae, while its bolometric luminosity is similar to that of the intermediate-luminosity SN 2008in. We created SYNOW models of the plateau phase spectra for line identification and to measure the expansion velocity. In the near-infrared spectra we find signs indicating possible weak interaction between the supernova ejecta and the pre-existing circumstellar material. These signs are also present in the previously unpublished near-infrared spectra of SN 2008in. The distance to SN 2009N is determined via the expanding photosphere method and the standard candle method as D = 21.6 +/- 1.1 Mpc. The produced nickel-mass is estimated to be similar to 0.020 +/- 0.004 M-circle dot. We infer the physical properties of the progenitor at the explosion through hydrodynamical modelling of the observables. We find the values ofthe total energy as similar to 0.48 x 10(51) erg, the ejected mass as similar to 11.5 M-circle dot, and the initial radius as similar to 287 R-circle dot.

Más información

Título según WOS: SN 2009N: linking normal and subluminous Type II-P SNe
Título de la Revista: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volumen: 438
Número: 1
Editorial: Oxford Academic
Fecha de publicación: 2014
Página de inicio: 368
Página final: 387
Idioma: English
URL: http://mnras.oxfordjournals.org/cgi/doi/10.1093/mnras/stt2203
DOI:

10.1093/mnras/stt2203

Notas: ISI