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- W3093543291 abstract "ABSTRACT At the end of its life, a very massive star is expected to collapse into a black hole (BH). The recent detection of an 85 M⊙ BH from the gravitational wave event GW 190521 appears to present a fundamental problem as to how such heavy BHs exist above the approximately 50 M⊙ pair-instability (PI) limit where stars are expected to be blown to pieces with no remnant left. Using mesa, we show that for stellar models with non-extreme assumptions, 90–100 M⊙ stars at reduced metallicity ($Z/mbox{ $mathrm{Z}_{odot }$}le 0.1$) can produce blue supergiant progenitors with core masses sufficiently small to remain below the fundamental PI limit, yet at the same time lose an amount of mass via stellar winds that is small enough to end up in the range of an ‘impossible’ 85 M⊙ BH. The two key points are the proper consideration of core overshooting and stellar wind physics with an improved scaling of mass-loss with iron (Fe) contents characteristic for the host galaxy metallicity. Our modelling provides a robust scenario that not only doubles the maximum BH mass set by PI, but also allows us to probe the maximum stellar BH mass as a function of metallicity and cosmic time in a physically sound framework." @default.
- W3093543291 created "2020-10-29" @default.
- W3093543291 creator A5029572878 @default.
- W3093543291 creator A5033233069 @default.
- W3093543291 creator A5033947343 @default.
- W3093543291 creator A5067530320 @default.
- W3093543291 date "2021-03-30" @default.
- W3093543291 modified "2023-10-15" @default.
- W3093543291 title "Maximum black hole mass across cosmic time" @default.
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- W3093543291 doi "https://doi.org/10.1093/mnras/stab842" @default.
- W3093543291 hasPublicationYear "2021" @default.
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