A Higher Probability Of Detecting Lensed Supermassive Black Hole ...

Astrophysics > Cosmology and Nongalactic Astrophysics arXiv:2102.10295 (astro-ph) [Submitted on 20 Feb 2021 (v1), last revised 11 Feb 2022 (this version, v2)] Title:A Higher Probability of Detecting Lensed Supermassive Black Hole Binaries by LISA Authors:Zucheng Gao, Xian Chen, Yi-Ming Hu, Jian-Dong Zhang, Shunjia Huang View a PDF of the paper titled A Higher Probability of Detecting Lensed Supermassive Black Hole Binaries by LISA, by Zucheng Gao and 4 other authors View PDF

Abstract:Gravitational lensing of gravitational waves (GWs) is a powerful probe of the matter distribution in the universe. Here we revisit the wave-optics effects induced by dark matter (DM) halos on the GW signals of merging massive black hole binaries (MBHBs), and we study the possibility of discerning these effects using the Laser Interferometer Space Antenna (LISA). In particular, we include the halos in the low-mass range of $\rm 10^5-10^8\, M_\odot$ since they are the most numerous according to the cold DM model. We simulate the lensed signals corresponding to a wide range of impact parameters, and we find distinguishable deviation from the standard best-fit GW templates even when the impact parameter is as large $y\simeq50$. Consequently, we estimate that over $(0.1-1.6)\%$ of the MBHBs in the mass range of $\rm 10^{5.0}-10^{6.5}\, M_\odot$ and the redshift range of $4-10$ should show detectable wave-optics effects. This probability is one order of magnitude higher than that derived in previous works. The uncertainty comes mainly from the mass function of the DM halos. Not detecting any signal during the LISA mission would imply that DM halos with $\rm 10^5-10^8\, M_\odot$ are less numerous than what the cold DM model predicts.

Comments:	10 pages, 14 figures, accepted for publication in MNRAS
Subjects:	Cosmology and Nongalactic Astrophysics (astro-ph.CO); General Relativity and Quantum Cosmology (gr-qc)
Cite as:	arXiv:2102.10295 [astro-ph.CO]
(or arXiv:2102.10295v2 [astro-ph.CO] for this version)
https://doi.org/10.48550/arXiv.2102.10295 Focus to learn more arXiv-issued DOI via DataCite
Related DOI:	https://doi.org/10.1093/mnras/stac365 Focus to learn more DOI(s) linking to related resources

Submission history

From: Xian Chen [view email] [v1] Sat, 20 Feb 2021 09:10:11 UTC (474 KB) [v2] Fri, 11 Feb 2022 03:24:18 UTC (422 KB) Full-text links:

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