SN 2009N: linking normal and subluminous Type II-P Sne
Data(s) |
11/02/2014
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Resumo |
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 These signs are also present in the previously unpublished near-infrared spectra of SN 2008in.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 ∼0.020 ± 0.004 M⊙. We infer the physical properties of the progenitor at the explosion through hydrodynamical modelling of the observables. We find the values of the total energy as ∼0.48 × 1051 erg, the ejected mass as ∼11.5 M⊙, and the initial radius as ∼287 R⊙. |
Formato |
application/pdf |
Identificador |
http://dx.doi.org/10.1093/mnras/stt2203 http://pure.qub.ac.uk/ws/files/9547992/SN_2009N_SN_2009N.pdf |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/openAccess |
Fonte |
Takats , K , L. Pumo , M , Elias-Rosa , N , Pastorello , A , Pignata , G , Paillas , E , Zampieri , L , Anderson , J P , Vinko , J , Benetti , S , Botticella , M T , Bufano , F , Campillay , A , Cartier , R , Ergon , M , Folatelli , G , Foley , R J , Forster , F , Hamuy , M , Hentunen , V-P , Kankare , E , Leloudas , G , Morrell , N , Nissinen , M , Phillips , M M , Smartt , S J , Stritzinger , M , Taubenberger , S , Valenti , S , Van Dyk , S D , Haislip , J B , LaCluyze , A P , Moore , J P & Reichart , D 2014 , ' SN 2009N: linking normal and subluminous Type II-P Sne ' Monthly Notices of the Royal Astronomical Society , vol 438 , no. 1 , pp. 368-387 . DOI: 10.1093/mnras/stt2203 |
Tipo |
article |