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Gravitational wave background from sub-luminous GRBs: prospects for second- and third-generation detectors

Howell, E. and Regimbau, T. and Corsi, A. and Coward, D. and Burman, R. (2011) Gravitational wave background from sub-luminous GRBs: prospects for second- and third-generation detectors. Monthly Notices of the Royal Astronomical Society, 410 (4). pp. 2123-2136. ISSN 0035-8711. https://resolver.caltech.edu/CaltechAUTHORS:20110302-141501861

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Abstract

We assess the detection prospects of a gravitational wave background associated with sub-luminous gamma-ray bursts (SL-GRBs). We assume that the central engines of a significant proportion of these bursts are provided by newly born magnetars and consider two plausible GW emission mechanisms. First, the deformation-induced triaxial GW emission from a newly born magnetar. Secondly, the onset of a secular bar-mode instability, associated with the long-lived plateau observed in the X-ray afterglows of many gamma-ray bursts. With regards to detectability, we find that the onset of a secular instability is the most optimistic scenario: under the hypothesis that SL-GRBs associated with secularly unstable magnetars occur at a rate of (48–80) Gpc^(−3) yr^(−1) or greater, cross-correlation of data from two Einstein Telescopes (ETs) could detect the GW background associated to this signal with a signal-to-noise ratio of 3 or greater after 1 year of observation. Assuming neutron star spindown results purely from triaxial GW emissions, we find that rates of around (130–350) Gpc^(−3) yr^(−1) will be required by ET to detect the resulting GW background. We show that a background signal from secular instabilities could potentially mask a primordial GW background signal in the frequency range where ET is most sensitive. Finally, we show how accounting for cosmic metallicity evolution can increase the predicted signal-to-noise ratio for background signals associated with SL-GRBs.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1111/j.1365-2966.2010.17585.xDOIArticle
ORCID:
AuthorORCID
Corsi, A.0000-0001-8104-3536
Additional Information:© 2010 The Authors. Journal compilation © 2010 RAS. Accepted 2010 August 23. Received 2010 August 13. Article first published online: 25 November 2010. We gratefully thank P. Mészáros for agreeing to provide us with data for the model in Corsi & Mészáros (2009a) of the secular bar-mode instability. We also thank Christian Ott for a careful reading an early initial manuscript and for providing us with important feedback on post-collapse instabilities in core-collapse supernovae. The authors also gratefully acknowledge Vuk Mandic who carefully read the manuscript and made some insightful suggestions as part of the LIGO Scientific Collaboration review. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation. This paper has LIGO Document Number LIGO-P100083.
Funders:
Funding AgencyGrant Number
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Subject Keywords:gravitational waves – supernovae: general – cosmology: miscellaneous – gamma-ray bursts.
Other Numbering System:
Other Numbering System NameOther Numbering System ID
LIGO Document LIGO-P100083
Issue or Number:4
Record Number:CaltechAUTHORS:20110302-141501861
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20110302-141501861
Official Citation:Howell, E., Regimbau, T., Corsi, A., Coward, D. and Burman, R. (2011), Gravitational wave background from sub-luminous GRBs: prospects for second- and third-generation detectors. Monthly Notices of the Royal Astronomical Society, 410: 2123–2136. doi: 10.1111/j.1365-2966.2010.17585.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:22617
Collection:CaltechAUTHORS
Deposited By: Benjamin Perez
Deposited On:03 Mar 2011 03:29
Last Modified:03 Oct 2019 02:39

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