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OGLE-2013-SN-079: A LONELY SUPERNOVA CONSISTENT WITH A HELIUM SHELL DETONATION
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Number of Authors: 34
2015 (English)In: Astrophysical Journal Letters, ISSN 2041-8205, E-ISSN 2041-8213, Vol. 799, no 1, L2Article in journal (Refereed) Published
Abstract [en]

We present observational data for a peculiar supernova discovered by the OGLE-IV survey and followed by the Public ESO Spectroscopic Survey for Transient Objects. The inferred redshift of z = 0.07 implies an absolute magnitude in the rest-frame I-band of M-1 similar to -17.6 mag. This places it in the luminosity range between normal Type Ia SNe and novae. Optical and near infrared spectroscopy reveal mostly Ti and Ca lines, and an unusually red color arising from strong depression of flux at rest wavelengths <5000 angstrom. To date, this is the only reported SN showing Ti-dominated spectra. The data are broadly consistent with existing models for the pure detonation of a helium shell around a low-mass CO white dwarf and double-detonation models that include a secondary detonation of a CO core following a primary detonation in an overlying helium shell.

Place, publisher, year, edition, pages
2015. Vol. 799, no 1, L2
Keyword [en]
supernovae: general, supernovae: individual (OGLE-2013-SN-079), surveys, white dwarfs
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-114236DOI: 10.1088/2041-8205/799/1/L2ISI: 000348143500002OAI: oai:DiVA.org:su-114236DiVA: diva2:798337
Note

AuthorCount:34;

Available from: 2015-03-26 Created: 2015-02-25 Last updated: 2017-12-04Bibliographically approved

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