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SN 2010MB: Direct Evidence for A Supernova Interacting with A Large Amount of Hydrogen-Free Circumstellar Material

Ben-Ami, S and Gal-Yam, A and Mazzali, PA and Gnat, O and Modjaz, M and Rabinak, I and Sullivan, M and Bildsten, L and Poznanski, D and Yaron, O and Arcavi, I and Bloom, JS and Horesh, A and Kasliwal, MM and Kulkarni, SR and Nugent, PE and Ofek, EO and Perley, DA and Quimby, R and Xu, D (2014) SN 2010MB: Direct Evidence for A Supernova Interacting with A Large Amount of Hydrogen-Free Circumstellar Material. The Astrophysical Journal, 785 (1). ISSN 1538-4357

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Abstract

We present our observations of SN 2010mb, a Type Ic supernova (SN) lacking spectroscopic signatures of H and He. SN 2010mb has a slowly declining light curve (LC) (~600 days) that cannot be powered by 56Ni/56Co radioactivity, the common energy source for Type Ic SNe. We detect signatures of interaction with hydrogen-free circumstellar material including a blue quasi-continuum and, uniquely, narrow oxygen emission lines that require high densities (~109 cm–3). From the observed spectra and LC, we estimate that the amount of material involved in the interaction was ~3 M ☉. Our observations are in agreement with models of pulsational pair-instability SNe described in the literature.

Item Type: Article
Uncontrolled Keywords: 0201 Astronomical And Space Sciences, 0305 Organic Chemistry, 0306 Physical Chemistry (Incl. Structural)
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Astrophysics Research Institute
Publisher: American Astronomical Society
Related URLs:
Date Deposited: 18 May 2017 10:17
Last Modified: 18 May 2017 10:17
DOI or Identification number: 10.1088/0004-637X/785/1/37
URI: http://researchonline.ljmu.ac.uk/id/eprint/6470

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