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19 April 2024 |
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The gamma-ray burst of 980425 and its association with the extraordinary radio emission from a most unusual supernova | | S. R. Kulkarni
; D. A. Frail
; M. H. Wieringa
; R. D. Ekers
; E. M. Sadler
; R. M. Wark
; J. L. Higdon
; E. S. Phinney
; J. S. Bloom
; | | Date: |
1 Jul 1998 | | Subject: | astro-ph | | Affiliation: | CIT), D. A. Frail (NRAO), M. H. Wieringa (ATNF), R. D. Ekers (ATNF), E. M. Sadler (U.Sidney), R. M. Wark (ATNF), J. L. Higdon (ATNF), E. S. Phinney (CIT), and J. S. Bloom (CIT | | Abstract: | Supernova SN 1998bw exploded in the same direction and at the same time as the gamma-ray burst GRB 980425. Here we report radio observations of this type Ic supernova, beginning 4 days after the gamma-ray burst. At its peak the radio source is the most luminous ever seen from a supernova, nu L_nu = 4 x 10^38 erg/s at 5 GHz. More remarkably, the traditional synchrotron interpretation of the radio emission requires that the radio source be expanding at an apparent velocity of at least twice the speed of light, indicating that this supernova was accompanied by a shock wave moving at relativistic speed. The energy U_e associated with the radio-emitting relativistic electrons must lie between 10^49 erg | | Source: | arXiv, astro-ph/9807001 | | Services: | Forum | Review | PDF | Favorites | |
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