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, CM; Covino, S; D'Avanzo, P; Ellman, N; Grado, A; Melandri, A; Palazzi, E; Piascik, A; Piranomonte, S; Rabinowitz, D; Raimondo, G; Smartt, S; Steele, IA; Stritzinger, M; Yang, S; Ascenzi, S; Valle, MD; Gal-Yam, A; Getman, F; Greco, G; Inserra, C; Kankare, E; Limatola, L; Nicastro, L; Pastorello, A; Pulone, L; Stamerra, A; Stella, L; Stratta, G; Tartaglia, L; Turatto, M

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

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Pian, E, Tomasella, L, Cappellaro, E, Benetti, S, Mazzali, PA, Baltay, C, Branchesi, M, Brocato, E, Campana, S, Copperwheat, CM, Covino, S, D'Avanzo, P, Ellman, N, Grado, A, Melandri, A, Palazzi, E, Piascik, A, Piranomonte, S, Rabinowitz, D, Raimondo, G et al (2016) 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. ISSN 0035-8711

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Publisher URL: http://dx.doi.org/10.1093/mnras/stw3247

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:	This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record MNRAS (2016) 466 (2): 1848-1856. is available online at: http://dx.doi.org/10.1093/mnras/stw3247
Uncontrolled Keywords:	astro-ph.HE; astro-ph.HE
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Astrophysics Research Institute
Publisher:	Oxford University Press
Related URLs:	http://arxiv.org/abs/1612.03275v1
Date of acceptance:	9 December 2016
Date of first compliant Open Access:	17 January 2017
Date Deposited:	17 Jan 2017 12:30
Last Modified:	20 Apr 2022 08:00
URI:	https://researchonline.ljmu.ac.uk/id/eprint/5277

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