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The Local Rate and the Progenitor Lifetimes of Short-Hard Gamma-Ray Bursts: Synthesis and Predictions for the Laser Interferometer Gravitational-Wave Observatory

Nakar, Ehud and Gal-Yam, Avishay and Fox, Derek B. (2006) The Local Rate and the Progenitor Lifetimes of Short-Hard Gamma-Ray Bursts: Synthesis and Predictions for the Laser Interferometer Gravitational-Wave Observatory. Astrophysical Journal, 650 (1). pp. 281-290. ISSN 0004-637X. https://resolver.caltech.edu/CaltechAUTHORS:20110708-151056482

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Abstract

The recent discovery of the first four afterglows of short-hard gamma-ray bursts (SHBs) suggests that they typically result from long-lived progenitor systems. The most popular progenitor model invokes the merger of either double neutron star (DNS) binaries or neutron star-black hole (NS-BH) systems. Such events are strong sources of gravitational waves (GWs) and might be detected by ground-based GW observatories. In this work we combine the census of SHB observations with refined theoretical analysis to perform a critical evaluation of the compact binary model. We then explore the implications for GW detection of these events. Beginning from the measured star formation rate through cosmic time, we consider what intrinsic luminosity and lifetime distributions can reproduce the known SHB redshifts and luminosities as well as the peak flux distribution of the large BATSE SHB sample. We find the following: (1) The typical progenitor lifetime is long. Assuming lognormal lifetime distribution, the typical lifetime is >4 (1) Gyr (2 σ [3 σ] c.l.). If the lifetime distribution is a power law with index η, then η > -0.5 (-1) (2 σ [3 σ] c.l.). This result is difficult to reconcile with the properties of the observed Galactic DNS population, suggesting that if SHBs do result from DNS mergers, then the observed Galactic binaries do not represent the cosmic one. (2) We find that the local rate of SHBs is larger than 10 Gpc^(-3) yr^(-1) and may be higher by several orders of magnitude, significantly above previous estimates. (3) Assuming that SHBs do result from compact binaries, our predictions for the LIGO and VIRGO event rates are encouraging: the chance for detection by current facilities is not negligible, while a coincident detection of GW and electromagnetic radiation from an SHB is guaranteed for next-generation observatories.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1086/505855DOIArticle
http://iopscience.iop.org/0004-637X/650/1/281/PublisherArticle
ORCID:
AuthorORCID
Nakar, Ehud0000-0002-4534-7089
Gal-Yam, Avishay0000-0002-3653-5598
Fox, Derek B.0000-0002-3714-672X
Additional Information:© 2006 American Astronomical Society. Received 2005 December 5; accepted 2006 April 30. We are grateful to E. S. Phinney and E. Ofek for illuminating discussions and advice. We thank D. Frail, S. Kulkarni, R. Sari, B. Cameron, M. Milosavljević, H. Pfeiffer, D. Palmer, T. Piran, S. Ando, and C. Miller for helpful discussions. E. N. was supported by a senior research fellowship from the Sherman Fairchild Foundation. A. G. acknowledges support by NASA through Hubble Fellowship grant HST-HF-01158.01-A awarded by STScI, which is operated by AURA, Inc., for NASA, under contract NAS 5-26555.
Funders:
Funding AgencyGrant Number
Sherman Fairchild FoundationUNSPECIFIED
NASA Hubble FellowshipHST-HF-01158.01-A
NASANAS 5-26555
Subject Keywords:gamma rays: bursts; gravitational waves
Issue or Number:1
Record Number:CaltechAUTHORS:20110708-151056482
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20110708-151056482
Official Citation:The Local Rate and the Progenitor Lifetimes of Short-Hard Gamma-Ray Bursts: Synthesis and Predictions for the Laser Interferometer Gravitational-Wave Observatory Ehud Nakar et al. 2006 ApJ 650 281
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:24348
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:11 Jul 2011 14:30
Last Modified:20 Nov 2019 22:47

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