CERN Accelerating science

Article
Report number	arXiv:2403.19650 ; KCL-PH-TH/2024-16 ; CERN-TH-2024-038 ; AION-REPORT/2024-03
Title	Consistency of JWST Black Hole Observations with NANOGrav Gravitational Wave Measurements
Author(s)	Ellis, John (King's Coll. London ; CERN) ; Fairbairn, Malcolm (King's Coll. London) ; Hütsi, Gert (Unlisted, EE) ; Urrutia, Juan (Unlisted, EE ; NICPB, Tallinn) ; Vaskonen, Ville (Unlisted, EE ; Padua U. ; INFN, Padua) ; Veermäe, Hardi (Unlisted, EE)
Publication	2024-11-01
Imprint	2024-03-28
Number of pages	9
In:	Astron. Astrophys. 691 (2024) A270
DOI	10.1051/0004-6361/202450846 (publication)
Subject category	gr-qc ; General Relativity and Cosmology ; astro-ph.HE ; Astrophysics and Astronomy ; astro-ph.CO ; Astrophysics and Astronomy
Abstract	JWST observations have opened a new chapter in studies of supermassive black holes (SMBHs), stimulating discussion of two puzzles: the abundance of SMBHs in the early Universe and the fraction of dual AGNs. In this paper we argue that the answers to these puzzles may be linked to an interpretation of the data on the nHz gravitational wave (GWs) discovered by NANOGrav and other Pulsar Timing Arrays (PTAs) in terms of SMBH binaries losing energy by interactions with their environments as well as by GW emission. According to this interpretation, the SMBHs in low-$z$ AGNs are the tip of the iceberg of the local SMBH population, which are mainly in inactive galaxies. This interpretation would favour the observability of GW signals from BH binaries in LISA and deciHz GW detectors.
Copyright/License	preprint: (License: CC BY 4.0) publication: © 2024 The Authors (License: CC BY 4.0)

Corresponding record in: Inspire