Anomalous extinction behaviour towards the Type Ia SN 2003cg

N. Elias-Rosa, S. Benetti, E. Cappellaro, M. Turatto, P. Z. Mazzali, F. Patat, W. P.S. Meikle, M. Stehle, A. Pastorello, G. Pignata, R. Kotak, A. Harutyunyan, G. Altavilla, H. Navasardyan, Y. Qiu, M. Salvo, W. Hillebrandt

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

110 Citas (Scopus)

Resumen

We present optical and near-infrared photometry and spectroscopy of the Type la SN 2003cg, which exploded in the nearby galaxy NGC 3169. The observations cover a period between -8.5 and +414d post-maximum. SN 2003cg is a normal but highly reddened Type Ia event. Its B magnitude at maximum B max = 15.94 ± 0.04 and Δm 15(B) obs = 1.12 ± 0.04 [Δm 15(5)intrinsic = 1.25 ± 0.05]. Allowing R V to become a free parameter within the Cardelli et al. extinction law, simultaneous matches to a range of colour curves of normal SNe la yielded E(B - V) = 1.33 ± 0.11, and R V = 1.80 ± 0.19. While the value obtained for R V is small, such values have been invoked in the past, and may imply a grain size which is small compared with the average value for the local interstellar medium.

Idioma originalInglés
Páginas (desde-hasta)1880-1900
Número de páginas21
PublicaciónMonthly Notices of the Royal Astronomical Society
Volumen369
N.º4
DOI
EstadoPublicada - jul 2006

Áreas temáticas de ASJC Scopus

  • Astronomía y astrofísica
  • Ciencias planetarias y espacial

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