Binary neutron star mergers and third generation detectors: localization and early warning

Chan, M. L., Messenger, C. , Heng, I. S. and Hendry, M. (2018) Binary neutron star mergers and third generation detectors: localization and early warning. Physical Review D, 97(12), 123014. (doi:10.1103/PhysRevD.97.123014)

[img]
Preview
Text
163190.pdf - Published Version
Available under License Creative Commons Attribution.

3MB

Abstract

For third generation gravitational wave detectors, such as the Einstein Telescope, gravitational wave signals from binary neutron stars can last up to a few days before the neutron stars merge. To estimate the measurement uncertainties of key signal parameters, we develop a Fisher matrix approach which accounts for effects on such long duration signals of the time-dependent detector response and the Earth’s rotation. We use this approach to characterize the sky localization uncertainty for gravitational waves from binary neutron stars at 40, 200, 400, 800, and 1600 Mpc, for the Einstein Telescope and Cosmic Explorer individually and operating as a network. We find that the Einstein Telescope alone can localize the majority of detectable binary neutron stars at a distance of ≤ 200     Mpc to within 100     deg 2 with 90% confidence. A network consisting of the Einstein Telescope and Cosmic Explorer can enhance the sky localization performance significantly—with the 90% credible region of O ( 1 )     deg 2 for most sources at ≤ 200     Mpc and ≤ 100     deg 2 for most sources at ≤ 1600     Mpc . We also investigate the prospects for third generation detectors identifying the presence of a signal prior to merger. To do this, we require a signal to have a network signal-to-noise ratio of ≥ 12 and ≥ 5.5 for at least two interferometers, and to have a 90% credible region for the sky localization that is no larger than 100     deg 2 . We find that the Einstein Telescope can send out such “early-warning” detection alerts 1–20 hours before merger for 100% of detectable binary neutron stars at 40 Mpc and for ∼ 58 % of sources at 200 Mpc. For sources at a distance of 400 Mpc, a network of the Einstein telescope and Cosmic Explorer can produce detection alerts up to ∼ 3 hours prior to merger for 98% of detectable binary neutron stars.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Messenger, Dr Christopher and Heng, Professor Ik Siong and Hendry, Professor Martin and Chan, Mr Man Leong
Authors: Chan, M. L., Messenger, C., Heng, I. S., and Hendry, M.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN:2470-0010
ISSN (Online):2470-0029
Published Online:28 June 2018
Copyright Holders:Copyright © 2018 American Physical Society
First Published:First published in Physical Review D 97(12): 123014
Publisher Policy:Reproduced under a Creative Commons License

University Staff: Request a correction | Enlighten Editors: Update this record

Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
624341Investigations in Gravitational Radiation / Particle Astrophysics Capital equipmentSheila RowanScience & Technology Facilities Council (STFC)ST/L000946/1S&E P&A - PHYSICS & ASTRONOMY