Journal
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
Volume 68, Issue 4, Pages -Publisher
OXFORD UNIV PRESS
DOI: 10.1093/pasj/psw065
Keywords
accretion, accretion disks; black hole physics; galaxies: evolution; gravitational waves; quasars: general
Categories
Funding
- Ministry of Education, Science, Culture, and Sport and Technology (MEXT) [19740100, 18104003, 21540304, 22540243, 22340045, 24340048, 26610048, 15H05896, 26800115, JP16K17675, 19104006, 19740139, 19047004, 25610056, 26105521, 26287056]
- Chungbuk National University
- Korea Astronomy Space Science Institute
- Quest for Fundamental Principles in the Universe: from Particles to the Solar System and the Cosmos at Nagoya University
- JSPS
- Grants-in-Aid for Scientific Research [22540243, 19740100, 16H05999, 19740139, 21540304, 16K17675, 25610056, 26287056, 26105521, 15H05896, 26800115, 22340045] Funding Source: KAKEN
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We propose a new scenario for the evolution of the binaries of primordial black holes (PBH). We consider dynamical friction by ambient dark matter, scattering of dark matter particles with a highly eccentric orbit besides the standard two-body relaxation process to refill the loss cone, and interaction between the binary and a circumbinary disk, assuming that PBHs do not constitute the bulk of dark matter. Binary PBHs lose the energy and angular momentum by these processes, which could be sufficiently efficient for a typical configuration. Such a binary coalesces due to the gravitational wave emission on a time scale much shorter than the age of the universe. We estimate the density parameter of the resultant gravitational wave background. Astrophysical implications concerning the formation of intermediate-mass to supermassive black holes is also discussed.
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