We search for signatures of gravitational lensing in the gravitational-wave signals from compact binary coalescences detected by Advanced Laser Interferometer Gravitational-wave Observatory (LIGO) and Advanced Virgo during O3a, the first half of their third observing run. We study: (1) the expected rate of lensing at current detector sensitivity and the implications of a non-observation of strong lensing or a stochastic gravitational-wave background on the merger-rate density at high redshift; (2) how the interpretation of individual high-mass events would change if they were found to be lensed; (3) the possibility of multiple images due to strong lensing by galaxies or galaxy clusters; and (4) possible wave-optics effects due to point-mass microlenses. Several pairs of signals in the multiple-image analysis show similar parameters and, in this sense, are nominally consistent with the strong lensing hypothesis. However, taking into account population priors, selection effects, and the prior odds against lensing, these events do not provide sufficient evidence for lensing. Overall, we find no compelling evidence for lensing in the observed gravitational-wave signals from any of these analyses.

Search for Lensing Signatures in the Gravitational-Wave Observations from the First Half of LIGO-Virgo's Third Observing Run / Abbott, R., Abbott, T.D., Abraham, S., Acernese, F., Ackley, K., Adams, A., Adams, C., 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., Aleman, K.M., Allen, G., et al.. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - 923:1(2021), p. 14. [10.3847/1538-4357/ac23db]

Search for Lensing Signatures in the Gravitational-Wave Observations from the First Half of LIGO-Virgo's Third Observing Run

Di Pace S.;Di Palma I.;Drago M.;Leaci P.;Majorana E.;Mangano V.;Muciaccia F.;Naticchioni L.;Pannarale F.;Pierini L.;Placidi E.;Salemi F.;
2021

Abstract

We search for signatures of gravitational lensing in the gravitational-wave signals from compact binary coalescences detected by Advanced Laser Interferometer Gravitational-wave Observatory (LIGO) and Advanced Virgo during O3a, the first half of their third observing run. We study: (1) the expected rate of lensing at current detector sensitivity and the implications of a non-observation of strong lensing or a stochastic gravitational-wave background on the merger-rate density at high redshift; (2) how the interpretation of individual high-mass events would change if they were found to be lensed; (3) the possibility of multiple images due to strong lensing by galaxies or galaxy clusters; and (4) possible wave-optics effects due to point-mass microlenses. Several pairs of signals in the multiple-image analysis show similar parameters and, in this sense, are nominally consistent with the strong lensing hypothesis. However, taking into account population priors, selection effects, and the prior odds against lensing, these events do not provide sufficient evidence for lensing. Overall, we find no compelling evidence for lensing in the observed gravitational-wave signals from any of these analyses.
2021
Gravitational waves; Lensing; LIGO; Virgo
01 Pubblicazione su rivista::01a Articolo in rivista
Search for Lensing Signatures in the Gravitational-Wave Observations from the First Half of LIGO-Virgo's Third Observing Run / Abbott, R., Abbott, T.D., Abraham, S., Acernese, F., Ackley, K., Adams, A., Adams, C., 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., Aleman, K.M., Allen, G., et al.. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - 923:1(2021), p. 14. [10.3847/1538-4357/ac23db]
File allegati a questo prodotto
File Dimensione Formato  
Abbott_Search for Lensing Signatures_2021.pdf

solo gestori archivio

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 1.48 MB
Formato Adobe PDF
1.48 MB Adobe PDF   Contatta l'autore

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1624096
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 150
  • ???jsp.display-item.citation.isi??? 144
social impact