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

Mridweeka Singh*, Kuntal Misra, Stefano Valenti, Griffin Hosseinzadeh, Andrea Pastorello, Shubham Srivastav, Anjasha Gangopadhyay*, Raya Dastidar, Lina Tomasella, Iair Arcavi, Stefano Benetti, Emma Callis, Enrico Cappellaro, Nancy Elias-Rosa, D. Andrew Howell, Sang Chul Kim, Curtis McCully, Leonardo Tartaglia, Giacomo Terreran, Massimo Turatto

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We present the detailed optical evolution of a Type Ib SN 2015dj in NGC 7371, using data spanning up 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 o˙ of 56Ni, ejecta mass M o˙, and kinetic energy 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 o˙, suggesting a binary scenario.

Original languageEnglish
JournalAstrophysical Journal
Issue number2
StatePublished - 10 Mar 2021


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