dc.contributor.author Buisson, Lise du dc.contributor.author Marchant, Pablo dc.contributor.author Podsiadlowski, Philipp dc.contributor.author Kobayashi, Chiaki dc.contributor.author Abdalla, Filipe B. dc.contributor.author Taylor, Philip dc.contributor.author Mandel, Ilya dc.contributor.author Mink, Selma E. de dc.contributor.author Moriya, Takashi J. dc.contributor.author Langer, Norbert dc.date.accessioned 2020-10-22T11:30:01Z dc.date.available 2020-10-22T11:30:01Z dc.date.issued 2020-10-16 dc.identifier.citation Buisson , L D , Marchant , P , Podsiadlowski , P , Kobayashi , C , Abdalla , F B , Taylor , P , Mandel , I , Mink , S E D , Moriya , T J & Langer , N 2020 , ' Cosmic Rates of Black Hole Mergers and Pair-Instability Supernovae from Chemically Homogeneous Binary Evolution ' , Monthly Notices of the Royal Astronomical Society . https://doi.org/10.1093/mnras/staa3225 dc.identifier.issn 0035-8711 dc.identifier.other PURE: 22799134 dc.identifier.other PURE UUID: 80f5a346-5015-4c06-9ff1-bcb1bcf33af8 dc.identifier.other ArXiv: http://arxiv.org/abs/2002.11630v1 dc.identifier.other ORCID: /0000-0002-4343-0487/work/82470006 dc.identifier.uri http://hdl.handle.net/2299/23308 dc.description This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. dc.description.abstract During the first three observing runs of the Advanced gravitational-wave detector network, the LIGO/Virgo collaboration detected several black hole binary (BHBH) mergers. As the population of detected BHBH mergers grows, it will become possible to constrain different channels for their formation. Here we consider the chemically homogeneous evolution (CHE) channel in close binaries, by performing population synthesis simulations that combine realistic binary models with detailed cosmological calculations of the chemical and star-formation history of the Universe. This allows us to constrain population properties, as well as cosmological and aLIGO detection rates of BHBH mergers formed through this pathway. We predict a BHBH merger rate at redshift zero of $5.8 \hspace{1mm} \textrm{Gpc}^{-3} \textrm{yr}^{-1}$ through the CHE channel, to be compared with aLIGO's measured rate of ${53.2}_{-28.2}^{+55.8} \hspace{1mm} \text{Gpc}^{-3}\text{yr}^{-1}$, and find that eventual merger systems have BH masses in the range $17 - 43 \hspace{1mm} \textrm{M}_{\odot}$ below the pair-instability supernova (PISN) gap, and $>124 \hspace{1mm} \textrm{M}_{\odot}$ above the PISN gap. We further investigate the effects of momentum kicks during black hole formation, calculate cosmological and magnitude limited PISN rates and investigate the effects of high-redshift deviations in the star formation rate. We find that momentum kicks tend to increase delay times of BHBH systems, and our magnitude limited PISN rate estimates indicate that current deep surveys should be able to detect such events. Lastly, we find that our cosmological merger rate estimates change by at most $\sim 8\%$ for mild deviations of the star formation rate in the early Universe, and by up to $\sim 40\%$ for extreme deviations. en dc.language.iso eng dc.relation.ispartof Monthly Notices of the Royal Astronomical Society dc.subject astro-ph.HE dc.subject astro-ph.GA dc.subject astro-ph.SR dc.title Cosmic Rates of Black Hole Mergers and Pair-Instability Supernovae from Chemically Homogeneous Binary Evolution en dc.contributor.institution Centre for Astrophysics Research dc.contributor.institution School of Physics, Astronomy and Mathematics dc.description.status Peer reviewed rioxxterms.version AM rioxxterms.versionofrecord https://doi.org/10.1093/mnras/staa3225 rioxxterms.type Journal Article/Review herts.preservation.rarelyaccessed true
﻿