Optical photometry and spectroscopy of the low-luminosity, broad-lined Ic supernova iPTF15dld



Pian, E, Tomasella, L, Cappellaro, E, Benetti, S, Mazzali, PA, Baltay, C, Branchesi, M, Brocato, E, Campana, S, Copperwheat, C
et al (show 30 more authors) (2017) Optical photometry and spectroscopy of the low-luminosity, broad-lined Ic supernova iPTF15dld. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 466 (2). pp. 1848-1856.

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Abstract

Core-collapse stripped-envelope supernova (SN) explosions reflect the diversity of physical parameters and evolutionary paths of their massive star progenitors. We have observed the type Ic SN iPTF15dld (z = 0.047), reported by the Palomar Transient Factory. Spectra were taken starting 20 rest-frame days after maximum luminosity and are affected by a young stellar population background. Broad spectral absorption lines associated with the SN are detected over the continuum, similar to those measured for broad-lined, highly energetic SNe Ic. The light curve and maximum luminosity are instead more similar to those of low luminosity, narrow-lined Ic SNe. This suggests a behavior whereby certain highly-stripped-envelope SNe do not produce a large amount of Ni56, but the explosion is sufficiently energetic that a large fraction of the ejecta is accelerated to higher-than-usual velocities. We estimate SN iPTF15dld had a main sequence progenitor of 20-25 Msun, produced a Ni56 mass of ~0.1-0.2 Msun, had an ejecta mass of [2-10] Msun, and a kinetic energy of [1-18] e51 erg.

Item Type: Article
Additional Information: 11 pages, 7 figures, accepted for publication in MNRAS
Uncontrolled Keywords: stars: massive, supernovae: individual: iPTF15dld (LSQ15bfp, PS15clr), galaxies: starburst
Depositing User: Symplectic Admin
Date Deposited: 20 Jan 2020 16:45
Last Modified: 19 Jan 2023 00:08
DOI: 10.1093/mnras/stw3247
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3071038