Spectroscopy of the type Ia supernova SN 2002er: Days-11 to+215
Data(s) |
01/06/2005
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Resumo |
We present an extensive set of optical spectroscopy of the nearby type Ia supernova, SN 2002er, with 24 epochs spanning -11 to +34 days. Its spectral evolution is fairly typical of a type Ia supernova although it suffers high extinction. Nevertheless, there are differences in the spectral evolution when compared to coeval spectra of other normal type Ia supernova with comparable decline-rate parameters. Modelling of the photospheric phase spectra using a homogeneous abundance distribution in the atmosphere provides a fair match to the observations, but only by pushing the adopted distance and risetime close to the observational limits. Future improvements here will require models with a more realistic stratified abundance distribution. From simple modelling of a nebular spectrum obtained at +215 d, we infer a Ni-56 mass of 0.69 M-circle dot, consistent with that derived from the light curve. |
Identificador |
http://dx.doi.org/10.1051/0004-6361:20052756 http://www.scopus.com/inward/record.url?scp=21244490444&partnerID=8YFLogxK |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/restrictedAccess |
Fonte |
Kotak , R , Meikle , W P S , Pignata , G , Stehle , M , Smartt , S , Benetti , S , Hillebrandt , W , Lennon , D J , Mazzali , P A , Patat , F & Turatto , M 2005 , ' Spectroscopy of the type Ia supernova SN 2002er: Days-11 to+215 ' Astronomy and Astrophysics , vol 436 , no. 3 , pp. 1021-1031 . DOI: 10.1051/0004-6361:20052756 |
Palavras-Chave | #/dk/atira/pure/subjectarea/asjc/1900/1912 #Space and Planetary Science |
Tipo |
article |