Observational Constraints on Late-Time Radio Rebrightening of GRB-Supernovae
| Autor: | Zsolt Paragi, Dimitrios Giannios, Rodolfo Barniol Duran, Cormac Reynolds, Charee Peters, Alexander J. van der Horst, Eric M. Wilcots, A. Kathirgamaraju, Laura Chomiuk |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics GRB 980425 010504 meteorology & atmospheric sciences FOS: Physical sciences Astronomy and Astrophysics Astrophysics Electron 01 natural sciences Afterglow Luminosity Supernova Space and Planetary Science 0103 physical sciences GRB 030329 Gamma-ray burst Astrophysics - High Energy Astrophysical Phenomena 010303 astronomy & astrophysics 0105 earth and related environmental sciences |
| Popis: | We present a search for late-time rebrightening of radio emission from three supernovae (SNe) with associated gamma-ray bursts (GRBs). It has been previously proposed that the unusually energetic SNe associated with GRBs should enter the Sedov-Taylor phase decades after the stellar explosion, and this SN "remnant" emission will outshine the GRB radio afterglow and be detectable at significant distances. We place deep limits on the radio luminosity of GRB 980425/SN 1998bw, GRB 030329/SN 2003dh and GRB 060218/SN 2006aj, 10-18 years after explosion, with our deepest limit being $L_��$ $< 4 \times 10^{26}$ erg s$^{-1}$ Hz$^{-1}$ for GRB 980425/SN 1998bw. We put constraints on the density of the surrounding medium for various assumed values of the microphysical parameters related to the magnetic field and synchrotron-emitting electrons. For GRB 060218/SN 2006aj and GRB 980425/SN 1998bw, these density limits have implications for the density profile of the surrounding medium, while the non-detection of GRB 030329/SN 2003dh implies that its afterglow will not be detectable anymore at GHz frequencies. 9 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|