Evidence of evolution of the black hole mass function with redshift

• Verfasst von: Rinaldi, Stefano [VerfasserIn]
• Verfasst von: Pozzo, Walter Del [VerfasserIn]
• Verfasst von: Mapelli, Michela [VerfasserIn]
• Verfasst von: Lorenzo-Medina, Ana [VerfasserIn]
• Verfasst von: Dent, Thomas [VerfasserIn]
• Titel: Evidence of evolution of the black hole mass function with redshift
• Verf.angabe: Stefano Rinaldi, Walter Del Pozzo, Michela Mapelli, Ana Lorenzo-Medina, and Thomas Dent
• E-Jahr: 2024
• Jahr: April 2024
• Umfang: 15 S.
• Illustrationen: Illustrationen
• Fussnoten: Gesehen am 14.10.2024 ; Online verfügbar: 25. April 2024
• Titel Quelle: Enthalten in: Astronomy and astrophysics
• Ort Quelle: Les Ulis : EDP Sciences, 1969
• Jahr Quelle: 2024
• Band/Heft Quelle: 684(2024) vom: Apr., Artikel-ID A204, Seite 1-15
• ISSN Quelle: 1432-0746
• DOI: doi:10.1051/0004-6361/202348161
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1905628218

Abstract

Aims. We investigate the observed distribution of the joint primary mass, mass ratio, and redshift of astrophysical black holes using the gravitational wave events detected by the LIGO-Virgo-KAGRA collaboration and included in the third gravitational wave transient catalogue Methods. We reconstructed this distribution using Bayesian non-parametric methods, which are data-driven models able to infer arbitrary probability densities under minimal mathematical assumptions. Results. We find evidence that both the primary mass and mass-ratio distribution evolve with redshift: our analysis shows the presence of two distinct subpopulations in the primary mass−redshift plane, with the lighter population, ≲20 M⊙, disappearing at higher redshifts, z > 0.4. The mass-ratio distribution shows no support for symmetric binaries. Conclusions. The observed population of coalescing binary black holes evolves with look-back time, suggesting a trend in metallicity with redshift and/or the presence of multiple redshift-dependent formation channels.