Query : 2016A&A...592A..92L

2016A&A...592A..92L - Astronomy and Astrophysics, volume 592A, 92-92 (2016/8-1)

Reverse shock emission driven by post-merger millisecond magnetar winds: Effects of the magnetization parameter.

LIU L.D., WANG L.J. and DAI Z.G.

Abstract (from CDS):

The study of short-duration gamma-ray bursts provides growing evidence that a good fraction of double neutron star mergers lead to the formation of stable millisecond magnetars. The launch of Poynting flux by the millisecond magnetars could leave distinct electromagnetic signatures that reveal the energy dissipation processes in the magnetar wind. In previous studies, we assume that the magnetar wind becomes completely lepton-dominated so that electrons/positrons in the magnetar wind are accelerated by a diffusive shock. However, theoretical modeling of pulsar wind nebulae shows that in many cases the magnetic field energy in the pulsar wind may be strong enough to suppress diffusive shock acceleration. In this paper, we investigate the reverse shock emission and the forward shock emission with an arbitrary magnetization parameter σ of a magnetar wind. We find that the reverse shock emission strongly depends on σ, and in particular that σ∼0.3 leads to the strongest reverse shock emission. Future observations would be helpful to diagnose the composition of the magnetar wind.

Abstract Copyright: © ESO, 2016

Journal keyword(s): gamma-ray burst: general - radiation mechanisms: non-thermal - pulsars: general

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 M 1 SNR 05 34 30.9 +22 00 53           ~ 6029 1
2 Fermi bn090102122 gB 08 32 59.50 +33 06 25.7           ~ 209 0

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