258 citations · 1.1k across the 22 of their papers we have counts for
22 papers
Milliarcsecond astrometric oscillations in active galactic nuclei as a precursor of multi-messenger gravitational wave events
Leonid I. Gurvits, Alexander G. Polnarev, Sandor Frey +4
The existence of supermassive black hole binaries (SMBHBs) is predicted by various cosmological and evolutionary scenarios for active galactic nuclei. These objects are considered…
The evolution of a supermassive binary black hole in an non-spherical nuclear star cluster
Pavel B. Ivanov, Alexander G. Polnarev
(abridged) We consider a secular orbital evolution of a supermassive binary black hole (SBBH) with unequal masses and in a central part of a non-spherical nuclear…
J2102+6015: a potential distant multimessenger?
Leonid I. Gurvits, Sándor Frey, Máté Krezinger +7
We present and briefly discuss results of several studies of the source J2102+6015 with tentatively defined redshift z=4:575 which demonstrates unusual properties in imaging and as…
The evolution of a supermassive retrograde binary embedded in an accretion disk
P. B. Ivanov, J. C. B. Papaloizou, S. -J. Paardekooper +1
In this note we discuss the main results of a study of a massive binary with unequal mass ratio, q, embedded in an accretion disk, with its orbital rotation being opposed to that o…
The evolution of a binary in a retrograde circular orbit embedded in an accretion disk
P. B. Ivanov, J. C. B. Papaloizou, S. -J. Paardekooper +1
Supermassive black hole binaries may form as a consequence of galaxy mergers. Both prograde and retrograde orbits have been proposed. We study a binary of a small mass ratio, q, in…
Investigating formation condition of primordial black holes for generalized initial perturbation profiles
Tomohiro Nakama, Tomohiro Harada, A. G. Polnarev +1
Primordial black holes (PBHs) are an important tool in cosmology to probe the primordial spectrum of small-scale curvature perturbations that reenter the cosmological horizon durin…