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Verfasst von:Amendola, Luca [VerfasserIn]   i
 Rodrigues, Davi C. [VerfasserIn]   i
 Kumar, Sumit [VerfasserIn]   i
 Quartin, Miguel [VerfasserIn]   i
Titel:Constraints on cosmologically coupled black holes from gravitational wave observations and minimal formation mass
Verf.angabe:Luca Amendola, Davi C Rodrigues, Sumit Kumar and Miguel Quartin
E-Jahr:2024
Jahr:February 2024
Umfang:14 S.
Illustrationen:Illustrationen
Fussnoten:Gesehen am 30.07.2024
Titel Quelle:Enthalten in: Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society
Ort Quelle:Oxford : Oxford Univ. Press, 1827
Jahr Quelle:2024
Band/Heft Quelle:528(2024), 2 vom: Feb., Seite 2377-2390
ISSN Quelle:1365-2966
Abstract:We test the possibility that the black holes (BHs) detected by LIGO-Virgo-KAGRA (LVK) may be cosmologically coupled and grow in mass proportionally to the cosmological scale factor to some power k, which may also act as the dark energy source if k ≈ 3. This approach was proposed as an extension of Kerr BHs embedded in cosmological backgrounds and possibly without singularities or horizons. In our analysis, we develop and apply two methods to test these cosmologically coupled BHs (CCBHs) either with or without connection to dark energy. We consider different scenarios for the time between the binary BH formation and its merger, and we find that the standard log-uniform distribution yields weaker constraints than the CCBH-corrected case. Assuming that the minimum mass of a BH with stellar progenitor is 2 M⊙, we estimate the probability that at least one BH among the observed ones had an initial mass below this threshold. We obtain these probabilities either directly from the observed data or by assuming the LVK power-law-plus-peak mass distribution. In the latter case, we find at 2σ level, that k < 2.1 for the standard log-uniform distribution, or k < 1.1 for the CCBH-corrected distribution. Slightly weaker bounds are obtained in the direct method. Considering the uncertainties on the nature of CCBHs, we also find that the required minimum CCBH mass value to eliminate the tensions for k = 3 should be lower than 0.5 M⊙ (again at 2σ). Finally, we show that future observations have the potential to decisively confirm these bounds.
DOI:doi:10.1093/mnras/stae143
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

kostenfrei: Volltext: https://doi.org/10.1093/mnras/stae143
 kostenfrei: Volltext: https://academic.oup.com/mnras/article/528/2/2377/7529208
 DOI: https://doi.org/10.1093/mnras/stae143
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1897048645
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