Query : 2002A&A...381L...5C

2002A&A...381L...5C - Astronomy and Astrophysics, volume 381, L5-8 (2002/1-1)

Afterglow light curve modulated by a highly magnetized millisecond pulsar.

CHANG H.-Y., LEE C.-H. and YI I.

Abstract (from CDS):

We investigate consequences of a continuously energy-injecting central engine of gamma-ray burst (GRB) afterglow emission, assuming that a highly magnetized pulsar is left beaming in the core of a GRB progenitor. Beaming and continuous energy-injection are natural consequences of the pulsar origin of GRB afterglows. Whereas previous studies have considered continuous energy-injection from a new-born pulsar to interpret the deviation of afterglow light curves of GRBs from those with the simple power law behavior, a beaming effect, which is one of the most important aspects of pulsar emissions, is ignored in earlier investigations. We explicitly include the beaming effect and consider a change of the beaming with time due to a dynamical evolution of a new-born pulsar. We show that the magnitude of the afterglow from this fireball indeed first decreases with time, subsequently rises, and declines again. One of the most peculiar optical afterglows light curve of GRB 970508 can be accounted for by continuous energy injection with beaming due to a highly magnetized new-born pulsar. We discuss implications on such observational evidence for a pulsar.

Abstract Copyright:

Journal keyword(s): gamma rays: bursts - pulsar: general - stars: magnetic fields

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
1 GRB 970228 gB 05 01 46.7 +11 46 53           ~ 630 1
2 GRB 970508 gB 06 53 49.2 +79 16 19           ~ 854 1
3 GRB 000301C gB 16 20 18.5 +29 26 35           ~ 347 0

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