Radio precursors to neutron star binary mergings

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 $z\sim 1.3$ in the most optimistic scenario. The LOFAR ability to detect such events would crucially depend on exact efficiency of low-frequency radio emission mechanism.

6 pages, 2 figures, Accepted for publication in Astrophysics & Space Science. Largely extended version of ArXiv:0912.5216

References in corpus (12)

• A bright millisecond radio burst of extragalactic origin
• The ATNF Pulsar Catalogue
• Magnetized Neutron Star Mergers and Gravitational Wave Signals
• General relativistic simulations of magnetized binary neutron star mergers
• Evolution of magnetized, differentially rotating neutron stars: Simulations in full general relativity
• Longterm general relativistic simulation of binary neutron stars collapsing to a black hole
• A Comparison of the Afterglows of Short- and Long-Duration Gamma-Ray Bursts
• Can magnetic fields be detected during the inspiral of binary neutron stars?
• Precursors in Swift Gamma Ray Bursts with redshift
• General Relativistic Binary Merger Simulations and Short Gamma Ray Bursts
• Magnetic acceleration of ultra-relativistic GRB and AGN jets
• Afterglows of Gamma-Ray Bursts: Short vs. Long GRBs

Cited by in corpus (1)

• A search for dispersed radio bursts in archival Parkes Multibeam Pulsar Survey data