Measuring intermediate-mass black-hole binaries with advanced gravitational wave detectors

Veitch, J. , Pürrer, M. and Mandel, I. (2015) Measuring intermediate-mass black-hole binaries with advanced gravitational wave detectors. Physical Review Letters, 115(14), 141101. (doi: 10.1103/PhysRevLett.115.141101)

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Abstract

We perform a systematic study to explore the accuracy with which the parameters of intermediate-mass black-hole binary systems can be measured from their gravitational wave (GW) signatures using second-generation GW detectors. We make use of the most recent reduced-order models containing inspiral, merger, and ringdown signals of aligned-spin effective-one-body waveforms to significantly speed up the calculations. We explore the phenomenology of the measurement accuracies for binaries with total masses between 50 M ⊙ and 500 M ⊙ and mass ratios between 0.1 and 1. We find that (i) at total masses below ∼ 200 M ⊙ , where the signal-to-noise ratio is dominated by the inspiral portion of the signal, the chirp mass parameter can be accurately measured; (ii) at higher masses, the information content is dominated by the ringdown, and total mass is measured more accurately; (iii) the mass of the lower-mass companion is poorly estimated, especially at high total mass and more extreme mass ratios; and (iv) spin cannot be accurately measured for our injection set with nonspinning components. Most importantly, we find that for binaries with nonspinning components at all values of the mass ratio in the considered range and at a network signal-to-noise ratio of 15, analyzed with spin-aligned templates, the presence of an intermediate-mass black hole with mass > 100 M ⊙ can be confirmed with 95% confidence in any binary that includes a component with a mass of 130 M ⊙ or greater.

Item Type:Articles
Additional Information:New staff member, added from ORCID 12 06 17 MC
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Veitch, Dr John
Authors: Veitch, J., Pürrer, M., and Mandel, I.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN:0031-9007
ISSN (Online):1079-7114

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