2001A&A...368..464G


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST17:59:02

2001A&A...368..464G - Astronomy and Astrophysics, volume 368, 464-470 (2001/3-3)

Gamma-ray burst afterglows from jetted shocks in wind environments.

GOU L.J., DAI Z.G., HUANG Y.F. and LU T.

Abstract (from CDS):

Gamma-ray bursts with long durations are widely thought to arise from the collapse of massive stars, where the wind environment is unavoidable. It is also believed that γ-ray bursts come from jets. Considering these two points in this paper, we calculate the evolution of a highly collimated jet that expands in a stellar wind environment and the expected afterglow from such a jet. We use a set of refined dynamical equations and a realistic lateral speed of the jet, and find: (1) There is no observable break at the time when the Lorentz factor of the jet is equal to the inverse of its initial half-opening angle. (2) No obvious break appears at the time when the blast wave transits from the relativistic to the non-relativistic phase. (3) For the wind case, there is no flattening tendency even up to 109s. (4) Compared with the homogeneous medium case, our calculated flux is weaker in the stellar wind case. Finally, we find that two kinds of GRB models (neutron star mergers and massive star collapses) may be discriminated in our numerical results.

Abstract Copyright:

Journal keyword(s): gamma-rays: bursts - ISM: jets and outflows - stars: mass loss - shock waves

CDS comments: SN 1999E is associated with GB 980910 (GB 980910a misprint?)

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 SN 1997cy SN* 04 32 54.86 -61 42 57.5     17.4     SNIIn 135 3
2 GRB 970514 gB 04 40 -61.2           ~ 37 1
3 GRB 970228 gB 05 01 46.7 +11 46 53           ~ 626 1
4 GRB 980326 gB 08 36 34.3 -18 51 24           ~ 258 0
5 GRB 980910 gB 13 00 -21.1           ~ 20 2
6 SN 1999E SN* 13 17 16.37 -18 33 13.4   18       SNIIn 83 2
7 GRB 990510 gB 13 38 07.64 -80 29 48.8           ~ 466 1
8 GRB 990123 gB 15 25 29 +44 45.0     8.95     ~ 964 1
9 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1658 2

    Equat.    Gal    SGal    Ecl

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2020.10.24-17:59:02

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