Anomalous extinction behaviour towards the type Ia SN 2003cg

Elias-Rosa, N; Benetti, S; Cappellaro, E; Turatto, M; Mazzali, PA; Patat, F; Meikle, WPS; Stehle, M; Pastorello, A; Pignata, G.; Kotak, R; Harutyunyan, A; Altavilla G.; Navasardyan, H.; Qiu Y.; et. al.

Abstract

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. © 2006 RAS.

Más información

Título según WOS: Anomalous extinction behaviour towards the type Ia SN 2003cg
Título según SCOPUS: Anomalous extinction behaviour towards the Type Ia SN 2003cg
Título de la Revista: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volumen: 369
Número: 4
Editorial: Oxford Academic
Fecha de publicación: 2006
Página de inicio: 1880
Página final: 1900
Idioma: English
URL: http://mnras.oxfordjournals.org/cgi/doi/10.1111/j.1365-2966.2006.10430.x
DOI:

10.1111/j.1365-2966.2006.10430.x

Notas: ISI, SCOPUS