Results 41 to 50 of about 170,936 (294)

Can We Prescribe the Physical Parameters of Multiple Black Holes?

open access: yesMathematics, 2021
The parabolic-hyperbolic form of the constraints and superposed Kerr-Schild black holes have already been used to provide a radically new initialization of binary black hole configurations.
István Rácz
doaj   +1 more source

Tracing Black Hole Signatures in Several Black Hole Candidates Based on Their X-Ray Spectral Evolution [PDF]

open access: yesEPJ Web of Conferences, 2020
Investigation of spectral evolution of four black hole candidates was carried out by using color-color diagram as well as spectral fitting on Swift/XRT data.
Alfarizki Fahmi Iman, Vierdayanti Kiki
doaj   +1 more source

Hydrodynamical simulations of the tidal stripping of binary stars by massive black holes [PDF]

open access: yes, 2016
In a galactic nucleus, a star on a low angular momentum orbit around the central massive black hole can be fully or partially disrupted by the black hole tidal field, lighting up the compact object via gas accretion.
Campana, Sergio   +3 more
core   +4 more sources

LAST ORBITS OF BINARY BLACK HOLES [PDF]

open access: yesInternational Journal of Modern Physics A, 2002
Binary black hole systems in the pre-coalescence stage are numerically constructed by demanding that the associated spacetime admits a helical Killing vector. Comparison with third order post-Newtonian calculations indicates a rather good agreement until the innermost stable circular orbit.
Gourgoulhon, Eric   +2 more
openaire   +2 more sources

Dynamical Descalarization in Binary Black Hole Mergers [PDF]

open access: yesPhysical Review Letters, 2021
Scalar fields coupled to the Gauss-Bonnet invariant can undergo a tachyonic instability, leading to spontaneous scalarization of black holes. Studies of this effect have so far been restricted to single black hole spacetimes. We present the first results on dynamical scalarization in head-on collisions and quasicircular inspirals of black hole binaries
Hector O. Silva   +3 more
openaire   +3 more sources

Hypervelocity binary stars: smoking gun of massive binary black holes

open access: yes, 2007
The hypervelocity stars recently found in the Galactic halo are expelled from the Galactic center through interactions between binary stars and the central massive black hole or between single stars and a hypothetical massive binary black hole.
D. N. C. Lin   +4 more
core   +1 more source

When can gravitational-wave observations distinguish between black holes and neutron stars? [PDF]

open access: yes, 2013
Gravitational-wave observations of compact binaries have the potential to uncover the distribution of masses and angular momenta of black holes and neutron stars in the universe.
Brown, Duncan A.   +4 more
core   +2 more sources

Distinguishing types of compact-object binaries using the gravitational-wave signatures of their mergers

open access: yes, 2015
We analyze the distinguishability of populations of coalescing binary neutron stars, neutron-star black-hole binaries, and binary black holes, whose gravitational-wave signatures are expected to be observed by the advanced network of ground-based ...
Belczynski, Krzysztof   +3 more
core   +1 more source

Star Clusters with Primordial Binaries: III. Dynamical Interaction between Binaries and an Intermediate Mass Black Hole [PDF]

open access: yes, 2006
We present the first study of the dynamical evolution of an isolated star cluster that combines a significant population of primordial binaries with the presence of a central black hole.
Ardi, E.   +3 more
core   +2 more sources

Approximate binary-black-hole metric [PDF]

open access: yesPhysical Review D, 2000
20 pages, 1 figure; some changes in Sec.
openaire   +2 more sources

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