Spectroscopy of the type la supernova SN 2002er: Days -11 to +215

R. Kotak, W. P.S. Meikle, G. Pignata, M. Stehle, S. J. Smartt, S. Benetti, W. Hillebrandt, D. J. Lennon, P. A. Mazzali, F. Patat, M. Turatto

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

48 Citas (Scopus)

Resumen

We present an extensive set of optical spectroscopy of the nearby type la supernova, SN 2002er, with 24 epochs spanning -11 to +34 days. Its spectral evolution is fairly typical of a type la supernova although it suffers high extinction. Nevertheless, there are differences in the spectral evolution when compared to coeval spectra of other normal type la 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 56Ni mass of 0.69 M, consistent with that derived from the light curve.

Idioma originalInglés
Páginas (desde-hasta)1021-1031
Número de páginas11
PublicaciónAstronomy and Astrophysics
Volumen436
N.º3
DOI
EstadoPublicada - jun 2005

Áreas temáticas de ASJC Scopus

  • Astronomía y astrofísica
  • Ciencias planetarias y espacial

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