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Formation of black holes in the pair-instability mass gap: Hydrodynamical simulation of a massive star collision & evolution of a post-collision star

Published online by Cambridge University Press:  29 August 2024

Guglielmo Costa Open the ORCID record for Guglielmo Costa [Opens in a new window] ,
Alessandro Ballone ,
Michela Mapelli ,
Alessandro Bressan  and
Morgan MacLeod
Guglielmo Costa*
Affiliation:
Physics and Astronomy Department Galileo Galilei, University of Padova, Vicolo dell’Osservatorio 3, I-35122 Padova, Italy INAF - Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, I-35122 Padova, Italy INFN - Padova, Via Marzolo 8, I–35131 Padova, Italy
Alessandro Ballone
Affiliation:
Physics and Astronomy Department Galileo Galilei, University of Padova, Vicolo dell’Osservatorio 3, I-35122 Padova, Italy INAF - Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, I-35122 Padova, Italy INFN - Padova, Via Marzolo 8, I–35131 Padova, Italy
Michela Mapelli
Affiliation:
Physics and Astronomy Department Galileo Galilei, University of Padova, Vicolo dell’Osservatorio 3, I-35122 Padova, Italy INAF - Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, I-35122 Padova, Italy INFN - Padova, Via Marzolo 8, I–35131 Padova, Italy
Alessandro Bressan
Affiliation:
SISSA, via Bonomea 365, I–34136 Trieste, Italy
Morgan MacLeod
Affiliation:
Center for Astrophysics | Harvard & Smithsonian 60 Garden Street, MS-16, Cambridge, MA 02138, USA
*
email: [email protected]
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Abstract

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In this work, we study in detail the collision formation scenario of black holes (BHs) which lie in the pair-instability (PI) mass gap. We study the collision scenario of two massive stars by means of a smoothed-particle hydrodynamics (SPH) simulation and the post-collision evolution with detailed stellar evolutionary codes. We find that the stellar collision scenario is a suitable formation channel to populate the BHs’ PI mass gap.

Keywords

stars: evolutionhydrodynamicsblack hole physics
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S361: Massive Stars Near and Far , May 2022 , pp. 302 - 304
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

Ballone, A., Costa, G., Mapelli, M., & MacLeod, M. 2022, arXiv e-prints, arXiv:2204.03493Google Scholar
Costa, G., Ballone, A., Mapelli, M., & Bressan, A. 2022, arXiv e-prints, arXiv:2204.03492Google Scholar
Costa, G., et al. 2019, A&A, 631, A128 Google Scholar
Gaburov, E., Lombardi, James C., J., & Portegies Zwart, S. 2010, MNRAS, 402, 105Google Scholar
Paxton, B., et al. 2019, ApJS, 243, 10 CrossRefGoogle Scholar
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