skip to main content

SciTech ConnectSciTech Connect

Title: PTF 12gzk—A rapidly declining, high-velocity type Ic radio supernova

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.
Authors:
;  [1] ;  [2] ;  [3] ;  [4] ; ; ; ; ;  [5] ;  [6]
  1. Cahill Center for Astrophysics, California Institute of Technology, Pasadena, CA 91125 (United States)
  2. Department of Physics, The George Washington University, 725 21st Street, NW, Washington, DC 20052 (United States)
  3. National Radio Astronomy Observatory, P.O. Box 0, Socorro, NM 87801 (United States)
  4. Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States)
  5. Department of Particle Physics and Astrophysics, The Weizmann Institute of Science, Rehovot 76100 (Israel)
  6. Carnegie Institution for Science, Department of Terrestrial Magnetism, 5241 Broad Branch Road, Washington, DC 20008 (United States)
Publication Date:
OSTI Identifier:
22341985
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 778; 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; COSMIC GAMMA BURSTS; DENSITY; DISTANCE; DISTRIBUTION; EMISSION; EXPLOSIONS; SENSITIVITY; SUPERNOVAE; VELOCITY; X RADIATION