Late-Time Radio Emission from Type Ib/c Supernovae: Testing the Oblique GRB Jet Model

Details Late-Time Radio Emission from Type Ib/c Supernovae: Testing the Oblique GRB Jet Model Late-Time Radio Emission from Type Ib/c Supernovae: Testing the Oblique GRB Jet Model

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.8702s&link_type=abstract

American Astronomical Society Meeting 203, #87.02; Bulletin of the American Astronomical Society, Vol. 35, p.1346

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Evidence has been accruing that long-duration GRBs may be associated with some extreme Type Ic supernovae (SNe). Theoretically, GRBs originate from directed, relativistic jets. Their afterglows, particularly in the radio, are seen as their beamed jets, while remaining collimated, decelerate and expand significantly once they become non-relativistic. Yet, most GRB jets will not be pointed along our line-of-sight, with detectable γ - or X-ray emission, but may still be associated with a SN Ic. In this case, recent predictions have been made that the decelerating jet and counterjet should produce detectable radio emission for several SNe Ibb or Ic per year within 200 Mpc, depending on the jet angle relative to the line-of-sight. Furthermore, the jet angle determines how long after the outburst/explosion radio emission will be detected, even >>1 yr for nearby SNe Ib/c. We have tested this intriguing possibility by observing a significant sample of SNe, with 1 yr ≲ age ≲ 10 yr, within 100 Mpc. Preliminary results of this survey will be presented along with their implications.

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