Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.0504r&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #05.04; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
Scientific paper
We investigate triple interactions between massive black holes (MBHs) formed through galaxy mergers in a Lambda cold dark matter universe. We follow the assembly and growth of MBHs from primordial seeds, remnants of the first generation of stars, to the present day, by considering the merger history of dark matter haloes and their associated black holes in Monte Carlo realizations of the merger hierarchy. As a result of such a merger, the MBHs that were initially embedded in the galactic nuclei of the colliding galaxies form a binary system in the center of the merger remnant due to dynamical friction. If the coalescence timescale of such a MBH binary can be long
enough for a third MBH to fall in and interact with the central binary, the triple interaction leads typically to the final ejection of one of the three bodies and recoil of the remaining binary. In our study we simulate a large number of such triple interactions, with initial conditions constrained by the detailed merger history. Our results have implications for the abundance and properties of ejected single and binary MBHs, for observations of MBH mergers with LISA as a function of redshift, and for the M-sigma relation.
Fregeau John
Rasio Frederic A.
Umbreit Stefan
Volonteri Marta
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