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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 , 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 and Turatto, M (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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1612.03275v1.pdf - Accepted Version Download (1MB) | Preview |
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 |
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| 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: | |
| 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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