Spiro, S; Pastorello, A.; Pumo, M.L.; Valenti, S; Aoki, Tsutomu; Howell, D. A.; Salvo, Maria; Schmidt, Brian; Taubenberger, Stefano; Vennes, Stephane
We present new data for five underluminous Type II-plateau supernovae (SNe IIP), namely SN 1999gn, SN 2002gd, SN 2003Z, SN 2004eg and SN 2006ov. This new sample of lowluminosity SNe IIP (LL SNe IIP) is analysed together with similar objects studied in the past. All of them show a flat light-curve plateau lasting about 100 d, an underluminous late-time exponential tail, intrinsic colours that are unusually red, and spectra showing prominent and narrow P Cygni lines. A velocity of the ejected...[Show more]
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