Pshirkov 2010 双中子星并合时的射电辐射

主要内容:
并合时临时诞生一颗磁星，可能产生射线辐射。可能被LAFOR看到。

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Title:		Radio precursors to neutron star binary mergings
Authors:		Pshirkov, M. S.; Postnov, K. A.
Affiliation:		AA(Pushchino Radio Astronomy Observatory), AB(Sternberg Astronomical Institute)
Publication:		Astrophysics and Space Science, Online First (Ap&SS Homepage)
Publication Date:		05/2010
Origin:		SPRINGER
Keywords:		Gamma-rays: bursts, Binaries: close, Pulsars: general, Stars: neutron
Abstract Copyright:		(c) 2010: Springer Science+Business Media B.V.
DOI:		10.1007/s10509-010-0395-x
Bibliographic Code:		2010Ap&SS.tmp..158P

Abstract

We discuss a possible generation of radio bursts preceding final stages of binary neutron star mergings which can be accompanied by short gamma-ray bursts. Detection of such bursts appear to be advantageous in the low-frequency radio band due to a time delay of ten to several hundred seconds required for radio signal to propagate in the ionized intergalactic medium. This delay makes it possible to use short gamma-ray burst alerts to promptly monitor specific regions on the sky by low-frequency radio facilities, especially by LOFAR. To estimate the strength of the radio signal, we assume a power-law dependence of the radio luminosity on the total energy release in a magnetically dominated outflow, as found in millisecond pulsars. Based on the planned LOFAR sensitivity at 120 MHz, we estimate that the LOFAR detection rate of such radio transients could be about several events per month from redshifts up to z˜1.3 in the most optimistic scenario. The LOFAR ability to detect such events would crucially depend on exact efficiency of low-frequency radio emission mechanism.

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