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Title:
Gamma-ray burst afterglow plateaus and gravitational waves
Authors:
Corsi, Alessandra; Mészáros, Peter
Affiliation:
AA(Università di Roma Sapienza and INFN-Roma, Piazzale Aldo Moro 2, 00185-Roma, Italy ; Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802, USA ; Institute for Gravitation and the Cosmos, The Pennsylvania State University, University Park, PA 16802, USA ; IASF-Roma/INAF, Via Fosso del Cavaliere 100, 00133-Roma, Italy ; ), AB(Department of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802, USA ; Institute for Gravitation and the Cosmos, The Pennsylvania State University, University Park, PA 16802, USA ; Department of Physics, The Pennsylvania State University, University Park, PA 16802, USA; )
Publication:
Classical and Quantum Gravity, Volume 26, Issue 20, pp. 204016 (2009).
Publication Date:
10/2009
Origin:
IOP
DOI:
10.1088/0264-9381/26/20/204016
Bibliographic Code:
2009CQGra..26t4016C

Abstract

The existence of a shallow decay phase in the early x-ray afterglows of gamma-ray bursts is a common feature. We discuss the possibility that such a feature is connected to the formation of a highly magnetized millisecond pulsar, pumping energy into the fireball via magnetic dipole emission, while undergoing a secular bar-mode instability. If this is the case, gravitational wave losses associated with the neutron star's ellipsoidal deformation, would affect the star's spin-down, possibly producing a gravitational wave signal detectable by the advanced LIGO and Virgo. Such a signal, being emitted in association with an observed x-ray light-curve plateau over relatively long timescales, could open a new interesting opportunity for multi-messenger studies to be carried out in coincidence with gamma-ray burst sources. We conclude that the hypothesis proposed here deserves further investigation.
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