The Fast-evolving Type Ib Supernova SN 2015dj in NGC 7371

We present the detailed optical evolution of a Type Ib SN 2015dj in NGC 7371, using data spanning up to similar to 170 days after discovery. SN 2015dj shares similarity in light-curve shape with SN 2007gr and peaks at M-V = -17.37 +/- 0.02 mag. Analytical modeling of the quasi bolometric light curve yields 0.06 +/- 0.01 M-circle dot of Ni-56, ejecta mass = M-ej = 1.4(-0.5)(+1.3) M-circle dot, and kinetic energy E-k = 0.7(-0.3)(+0.6) x 10(51) erg. The spectral features show a fast evolution and resemble those of spherically symmetric ejecta. The analysis of nebular phase spectral lines indicates a progenitor mass between 13-20 M-circle dot, suggesting a binary scenario.

Misra, Kuntal (author)
Valenti, Stefano (author)
Hosseinzadeh, Griffin (author)
Pastorello, Andrea (author)
Srivastav, Shubham (author)
Gangopadhyay, Anjasha (author)
Dastidar, Raya (author)
Tomasella, Lina (author)
Arcavi, Iair (author)
Benetti, Stefano (author)
Callis, Emma (author)
Cappellaro, Enrico (author)
Elias-Rosa, Nancy (author)
Howell, D. Andrew (author)
Kim, Sang Chul (author)
McCully, Curtis (author)
Tartaglia, LeonardoStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)leta1160 (author)
Terreran, Giacomo (author)
Turatto, Massimo (author)
Stockholms universitetInstitutionen för astronomi (creator_code:org_t)

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