skip to main content

SciTech ConnectSciTech Connect

Title: OGLE-2013-SN-079: A LONELY SUPERNOVA CONSISTENT WITH A HELIUM SHELL DETONATION

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{sub I} ∼ –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 Å. 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.
Authors:
; ; ; ; ;  [1] ;  [2] ; ; ;  [3] ;  [4] ;  [5] ; ;  [6] ;  [7] ; ;  [8] ; ;  [9] ;  [10] more »; « less
  1. Astrophysics Research Centre, School of Mathematics and Physics, Queens University Belfast, Belfast BT7 1NN (United Kingdom)
  2. University of Warsaw, Astronomical Observatory, Al. Ujazdowskie 400-478 Warszawa (Poland)
  3. Institute of Astronomy, University of Cambridge, Madingley Road, CB3 0HA Cambridge (United Kingdom)
  4. Department of Astronomy and Theoretical Astrophysics Center, University of California, Berkeley, CA 94720 (United States)
  5. Benoziyo Center for Astrophysics, Weizmann Institute of Science, 76100 Rehovot (Israel)
  6. Las Cumbres Observatory Global Telescope Network, 6740 Cortona Drive, Suite 102 Goleta, CA 93117 (United States)
  7. European Southern Observatory for Astronomical Research in the Southern Hemisphere (ESO), Karl-Schwarzschild-Str. 2, 85748 Garching b. Munchen (Germany)
  8. Astrophysics Research Institute, Liverpool John Moores University, Liverpool (United Kingdom)
  9. Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85741 Garching (Germany)
  10. INAF - Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, I-35122 Padova (Italy)
Publication Date:
OSTI Identifier:
22364585
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 799; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ABSORPTION SPECTROSCOPY; CARBON MONOXIDE; COLOR; HELIUM; INFRARED SPECTRA; LUMINOSITY; MASS; NOVAE; RED SHIFT; SUPERNOVAE; WHITE DWARF STARS