Unveiling the spectrum of inspiralling binary black holes

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dc.contributor.author Roy, Soumen
dc.contributor.author Sengupta, Anand S. et al.
dc.contributor.author Arun, K. G.
dc.coverage.spatial United States of America
dc.date.accessioned 2021-05-14T05:18:44Z
dc.date.available 2021-05-14T05:18:44Z
dc.date.issued 2021-03
dc.identifier.citation Roy, Soumen and Sengupta, Anand S. et al. and Arun, K. G., “Unveiling the spectrum of inspiralling binary black holes”, Physical Review D, DOI: 10.1103/PhysRevD.103.064012, vol. 103, no. 6, Mar. 2021. en_US
dc.identifier.issn 2470-0010
dc.identifier.issn 2470-0029
dc.identifier.uri https://doi.org/10.1103/PhysRevD.103.064012
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/6453
dc.description.abstract The higher multipoles of gravitational wave signals from coalescing compact binaries play a vital role in the accurate reconstruction of source properties, bringing about a deeper and nuanced understanding of fundamental physics and astrophysics. Their effect is most pronounced in systems with asymmetric masses having an orbital geometry that is not face-on. The detection of higher multipoles of gravitational wave signals from any single, isolated merger event is challenging, as there is much less power in comparison to the dominant quadrupole mode. In this paper, we present a new method for their detection by combining multiple events observed in interferometric gravitational wave detectors. Sub-dominant modes present in (the inspiral part of) the signal from separate events are stacked using time-frequency spectrogram of the data. We demonstrate that this procedure enhances the signal-to-noise ratio of the higher-multipole components and thereby leads to increased chances of their detection. From Monte Carlo simulations we estimate that a combination of ? 100 events observed in two-detector coincidence can lead to the detection of the higher-multipole components with a � 95 % detection probability. The Advanced LIGO detectors are expected to record these many binary black hole merger events within a month of operation at design sensitivity. We also present results from the analysis of data from first and second observing runs containing previously detected events using our new method.
dc.description.statementofresponsibility by Soumen Roy, Anand S. Sengupta, et al. and K. G. Arun
dc.format.extent vol. 103, no. 6
dc.language.iso en_US en_US
dc.publisher American Physical Society en_US
dc.subject Gravitational wave detection en_US
dc.subject Gravitational wave sources en_US
dc.subject Gravitational waves en_US
dc.subject Binary stars en_US
dc.subject Neutron stars & pulsars en_US
dc.title Unveiling the spectrum of inspiralling binary black holes en_US
dc.type Article en_US
dc.relation.journal Physical Review D

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