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Expanding the LISA Horizon from the Ground

Wong, Kaze W. K. and Kovetz, Ely D. and Cutler, Curt and Berti, Emanuele (2018) Expanding the LISA Horizon from the Ground. Physical Review Letters, 121 (25). Art. No. 251102. ISSN 0031-9007. doi:10.1103/PhysRevLett.121.251102.

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The Laser Interferometer Space Antenna (LISA) gravitational-wave (GW) observatory will be limited in its ability to detect mergers of binary black holes (BBHs) in the stellar-mass range. A future ground-based detector network, meanwhile, will achieve by the LISA launch date a sensitivity that ensures complete detection of all mergers within a volume >O(10)  Gpc^3. We propose a method to use the information from the ground to revisit the LISA data in search for subthreshold events. By discarding spurious triggers that do not overlap with the ground-based catalogue, we show that the signal-to-noise threshold ρ_(LISA) employed in LISA can be significantly lowered, greatly boosting the detection rate. The efficiency of this method depends predominantly on the rate of false-alarm increase when the threshold is lowered and on the uncertainty in the parameter estimation for the LISA events. As an example, we demonstrate that while all current LIGO BBH-merger detections would have evaded detection by LISA when employing a standard ρ_(LISA) = 8 threshold, this method will allow us to easily (possibly) detect an event similar to GW150914 (GW170814) in LISA. Overall, we estimate that the total rate of stellar-mass BBH mergers detected by LISA can be boosted by a factor ∼4 (≳8) under conservative (optimistic) assumptions. This will enable new tests using multiband GW observations, significantly aided by the greatly increased lever arm in frequency.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Wong, Kaze W. K.0000-0001-8432-7788
Kovetz, Ely D.0000-0001-9256-1144
Cutler, Curt0000-0002-2080-1468
Berti, Emanuele0000-0003-0751-5130
Additional Information:© 2018 American Physical Society. Received 28 August 2018; revised manuscript received 3 October 2018; published 17 December 2018. It is our pleasure to thank Ilias Cholis, Marc Kamionkowski, Johan Samsing, and Fabian Schmidt for useful discussions. K.W. K.W. and E. B. are supported by NSF Grants No. PHY-1841464, No. AST-1841358, and NASA ATP Grant No. 17-ATP17-0225. E. D. K. was supported by NASA Grant No. NNX17AK38G. C. C.’s work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract to the National Aeronautics and Space Administration. C. C. also gratefully acknowledges support from NSF Grant No. PHY-1708212.
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Issue or Number:25
Record Number:CaltechAUTHORS:20181218-080906363
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91880
Deposited By: Tony Diaz
Deposited On:18 Dec 2018 17:48
Last Modified:24 Feb 2023 20:44

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