2001A&A...367..501D


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.16CEST20:29:46

2001A&A...367..501D - Astronomy and Astrophysics, volume 367, 501-505 (2001/2-4)

Could the unusual optical afterglow of GRB 000301c arise from a non-relativistic shock with energy injection?

DAI Z.G. and LU T.

Abstract (from CDS):

Recent observations on the gamma-ray burst (GRB) 000301c afterglow show that one sharp break appears in the global optical/IR light curves, and in particular the decay slope at late times is as steep as about -3.0. This unusual feature is clearly inconsistent with the standard afterglow shock model. Here we propose a non-standard model for the afterglow of GRB 000301c, in which an initial ultra-relativistic shock in a dense medium (``dirty environment'') rapidly evolved to the non-relativistic phase in 1 day after the burst. During such a phase, the shock was refreshed by a strongly magnetized millisecond pulsar through magnetic dipole radiation. This refreshment led to flattening of the light curves. After the energy injection, the afterglow decayed as ∝t–3.0 if the electron distribution index of the shocked medium, p≃3.4, derived from the optical spectrum. Therefore, our model can provide a plausible explanation for the peculiar optical/IR afterglow light curves of GRB 000301c.

Abstract Copyright:

Journal keyword(s): gamma-rays: bursts - shock waves

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 3B 940217 gB 01 56.3 +04 33           ~ 196 0
2 GRB 970508 gB 06 53 49.2 +79 16 19           ~ 835 1
3 GRB 990123 gB 15 25 29 +44 45.0     8.95     ~ 956 1
4 GRB 000301C gB 16 20 18.5 +29 26 35           ~ 337 2
5 GRB 970828 gB 18 08 31.6 +59 18 51           ~ 334 1
6 GRB 980519 gB 23 22 21.5 +77 15 43           ~ 193 0

    Equat.    Gal    SGal    Ecl

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2019.10.16-20:29:46

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