2015ApJ...799L...2I

Query : 2015ApJ...799L...2I

2015ApJ...799L...2I - Astrophys. J., 799, L2 (2015/January-3)

OGLE-2013-SN-079: a lonely supernova consistent with a helium shell detonation.

INSERRA C., SIM S.A., WYRZYKOWSKI L., SMARTT S.J., FRASER M., NICHOLL M., SHEN K.J., JERKSTRAND A., GAL-YAM A., HOWELL D.A., MAGUIRE K., MAZZALI P., VALENTI S., TAUBENBERGER S., BENITEZ-HERRERA S., BERSIER D., BLAGORODNOVA N., CAMPBELL H., CHEN T.-W., ELIAS-ROSA N., HILLEBRANDT W., KOSTRZEWA-RUTKOWSKA Z., KOZLOWSKI S., KROMER M., LYMAN J.D., POLSHAW J., ROPKE F.K., RUITER A.J., SMITH K., SPIRO S., SULLIVAN M., YARON O., YOUNG D. and YUAN F.

Abstract (from CDS):

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 MI∼ -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.

Abstract Copyright: ∼

Journal keyword(s): supernovae: general - supernovae: individual: OGLE-2013-SN-079 - surveys - white dwarfs

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 LEDA 292784 G 00 35 05.1559704744 -67 41 14.480553228   16.72   15.53   ~ 5 0
2 OGLE 2013-SN-79 SN* 00 35 10.20 -67 41 08.5           SNI 16 0
3 SN 2005E SN* 02 39 14.34 +01 05 55.0     16.8     SNIb/c 128 1
4 SN 2005ek SN* 03 05 48.96 +36 46 10.6     17.5     SNIc: 76 1
5 SN 2010X SN* 04 48 27.90 +73 28 14.8           SNIc 85 1
6 SN 2002bj SN* 05 11 46.41 -15 08 10.8     14.8     SNIIn 86 1
7 PTF 09dav SN* 22 46 55.15 +21 37 34.1           ~ 43 0

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