Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-04-02
AIP Conf.Proc.937:365-369,2007
Astronomy and Astrophysics
Astrophysics
5 pages, 4 figures; to appear in "Supernova 1987A: 20 Years After: Supernovae and Gamma-Ray Bursters", AIP, New York, eds. S.
Scientific paper
10.1063/1.2803592
While the members of the Type IIn category of supernovae are united by the presence of strong multicomponent Balmer emission lines in their spectra, they are quite heterogeneous with respect to other properties such as Balmer line profiles, light curves, strength of radio emission, and intrinsic brightness. We are now beginning to see variety among SNe IIn in their polarimetric characteristics as well, some but not all of which may be due to inclination angle effects. The increasing number of known "hybrid" SNe with IIn-like emission lines suggests that circumstellar material may be more common around all types of SNe than previously thought. Investigation of the correlations between spectropolarimetric signatures and other IIn attributes will help us address the question of classification of "interacting SNe" and the possibility of distinguishing different groups within the diverse IIn subclass.
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