GCRT J1745-3009: A precessing radio pulsar?

Abstract

A unique transient bursting radio source, GCRT J1745-3009, has been discovered (Hyman et al. 2005a) near the direction of the Galactic center. It is still an open question to explain this phenomenon, although some efforts to understand its nature have been made. This paper shows that most of the observed features can be reproduced by our proposed precessing pulsar model. It is found that the precession angle of the pulsar should be larger ($\ga 15^{\rm o}$) than that of previously known precessing pulsars, which have a precession angle $\la 10^{\rm o}$, if the beam width of the pulsar is larger than 10 degree. The pulsar could be a nulling (or even extremely) radio pulsars to account for the transient nature of the source. This model can be confirmed if a pulsar is detected at the position of the source. The pulsar could hardly be a normal neutron star (but probably a solid quark star) if the spin period of the pulsar is detected to be $\ga 10$ ms in the future.

6 page and 3 figures. Accepted for publication in MN LETTERS

References in corpus (7)

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• The Dynamic Radio Sky
• Quakes in Solid Quark Stars
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• A Faint, Steep Spectum Burst from the Radio Transient GCRT J1745-3009
• Discovery of ASKAP J173608.2-321635 as a Highly-Polarized Transient Point Source with the Australian SKA Pathfinder
• Provocative radio transients and base rate bias: a Bayesian argument for conservatism
• A Search for the Near-Infrared Counterpart to GCRT J1745-3009
• Circularly polarized emission from the transient bursting radio source GCRT J1745-3009
• To probe into pulsar's interior through gravitational waves
• The Filling of Neutron Star Magnetospheres with Plasma: Dynamics of the Motion of Electrons and Positrons
• A new perspective on GCRT J1745-3009
• The Appearance of a Radio-Pulsar Magnetosphere from a Vacuum with a Strong Magnetic Field. Motion of Charged Particles
• Quasi-periodic oscillations during magnetar giant flares in the strangeon star model