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    Search for intermediate-mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo

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    Author
    LIGO Scientific Collaboration
    Virgo Collaboration
    KAGRA Collaboration
    Affiliation
    University of Arizona
    Issue Date
    2022
    Keywords
    Black hole physics
    Gravitational waves
    Stars: black holes
    
    Metadata
    Show full item record
    Publisher
    EDP Sciences
    Citation
    Abbott, R., Abbott, T. D., Acernese, F., Ackley, K., Adams, C., Adhikari, N., Adhikari, R. X., Adya, V. B., Affeldt, C., Agarwal, D., Agathos, M., Agatsuma, K., Aggarwal, N., Aguiar, O. D., Aiello, L., Ain, A., Ajith, P., Akutsu, T., Albanesi, S., … Zweizig, J. (2022). Search for intermediate-mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo. Astronomy and Astrophysics.
    Journal
    Astronomy and Astrophysics
    Rights
    Copyright © ESO 2022.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Intermediate-mass black holes (IMBHs) span the approximate mass range 100-105 M· , between black holes (BHs) that formed by stellar collapse and the supermassive BHs at the centers of galaxies. Mergers of IMBH binaries are the most energetic gravitational-wave sources accessible by the terrestrial detector network. Searches of the first two observing runs of Advanced LIGO and Advanced Virgo did not yield any significant IMBH binary signals. In the third observing run (O3), the increased network sensitivity enabled the detection of GW190521, a signal consistent with a binary merger of mass ∼150 M· providing direct evidence of IMBH formation. Here, we report on a dedicated search of O3 data for further IMBH binary mergers, combining both modeled (matched filter) and model-independent search methods. We find some marginal candidates, but none are sufficiently significant to indicate detection of further IMBH mergers. We quantify the sensitivity of the individual search methods and of the combined search using a suite of IMBH binary signals obtained via numerical relativity, including the effects of spins misaligned with the binary orbital axis, and present the resulting upper limits on astrophysical merger rates. Our most stringent limit is for equal mass and aligned spin BH binary of total mass 200 M· and effective aligned spin 0.8 at 0.056 Gpc-3 yr-1 (90% confidence), a factor of 3.5 more constraining than previous LIGO-Virgo limits. We also update the estimated rate of mergers similar to GW190521 to 0.08 Gpc-3 yr-1. ©
    Note
    Immediate access
    ISSN
    0004-6361
    DOI
    10.1051/0004-6361/202141452
    Version
    Final published version
    ae974a485f413a2113503eed53cd6c53
    10.1051/0004-6361/202141452
    Scopus Count
    Collections
    UA Faculty Publications

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