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PTF 12gzk—A Rapidly Declining, High-velocity Type Ic Radio Supernova

Horesh, Assaf and Kulkarni, Shrinivas R. and Corsi, Alessandra and Frail, Dale A. and Cenko, S. Bradley and Ben-Ami, Sagi and Gal-Yam, Avishay and Yaron, Ofer and Arcavi, Iair and Kasliwal, Mansi M. and Ofek, Eran O. (2013) PTF 12gzk—A Rapidly Declining, High-velocity Type Ic Radio Supernova. Astrophysical Journal, 778 (1). Art. No. 63. ISSN 0004-637X.

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Only a few cases of Type Ic supernovae (SNe) with high-velocity ejecta (≥0.2 c) have been discovered and studied. Here, we present our analysis of radio and X-ray observations of the Type Ic SN PTF 12gzk. The radio emission declined less than 10 days after explosion, suggesting SN ejecta expanding at high velocity (~0.3 c). The radio data also indicate that the density of the circumstellar material (CSM) around the supernova is lower by a factor of ~10 than the CSM around normal Type Ic SNe. PTF 12gzk may therefore be an intermediate event between a "normal" SN Ic and a gamma-ray-burst-SN-like event. Our observations of this rapidly declining radio SN at a distance of 58 Mpc demonstrates the potential to detect many additional radio SNe, given the new capabilities of the Very Large Array (improved sensitivity and dynamic scheduling), which are currently missed, leading to a biased view of radio SNe Ic. Early optical discovery followed by rapid radio observations would provide a full description of the ejecta velocity distribution and CSM densities around stripped massive star explosions as well as strong clues about the nature of their progenitor stars.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Horesh, Assaf0000-0002-5936-1156
Kulkarni, Shrinivas R.0000-0001-5390-8563
Corsi, Alessandra0000-0001-8104-3536
Cenko, S. Bradley0000-0003-1673-970X
Ben-Ami, Sagi0000-0001-6760-3074
Gal-Yam, Avishay0000-0002-3653-5598
Yaron, Ofer0000-0002-0301-8017
Arcavi, Iair0000-0001-7090-4898
Kasliwal, Mansi M.0000-0002-5619-4938
Ofek, Eran O.0000-0002-6786-8774
Additional Information:© 2013 The American Astronomical Society. Received 2013 June 17; accepted 2013 September 15; published 2013 November 6. We thank the VLA, Swift, and CARMA staff for promptly scheduling this target of opportunity. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. This work made use of data supplied by the UK Swift Science Data Centre at the University of Leicester. PTF is a fully automated, wide-field survey aimed at a systematic exploration of explosions and variable phenomena in optical wavelengths. The participating institutions are Caltech, Columbia University, Weizmann Institute of Science, Lawrence Berkeley Laboratory, Oxford, and University of California at Berkeley. The program is centered on a 12K×8K, 7.8 deg2 CCD array (CFH12K) re-engineered for the 1.2 m Oschin Telescope at the Palomar Observatory by Caltech Optical Observatories. Photometric follow-up is undertaken by the automated Palomar 1.5 m telescope. The research of A.G. is supported by grants from the ISF, BSF, GIF, and Minerva, the EU/FP7 via an ERC grant, and the Kimmel award for innovative investigation.
Group:Palomar Transient Factory
Funding AgencyGrant Number
Israel Science FoundationUNSPECIFIED
Binational Science Foundation (USA-Israel)UNSPECIFIED
German-Israeli Foundation for Research and DevelopmentUNSPECIFIED
European Research Council (ERC)UNSPECIFIED
Subject Keywords:radio continuum: general – radio continuum: stars – supernovae: general – supernovae: individual: (PTF12gzk) – X-rays: general
Issue or Number:1
Record Number:CaltechAUTHORS:20131212-101237448
Persistent URL:
Official Citation:PTF 12gzk—A Rapidly Declining, High-velocity Type Ic Radio Supernova Assaf Horesh et al. 2013 ApJ 778 63
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42981
Deposited By: Tony Diaz
Deposited On:12 Dec 2013 21:55
Last Modified:22 Nov 2019 22:48

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