Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Leor Barack"'
Autor:
Leor Barack, Oliver Long
Publikováno v:
Physical Review D. 106
Using self-force methods, we consider the hyperbolic-type scattering of a pointlike particle carrying a scalar charge $Q$ off a Schwarzschild black hole. For given initial velocity and impact parameter, back-reaction from the scalar field modifies th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bbe8685896447a7a62ef27613b44dc0
https://doi.org/10.1103/physrevd.106.104031
https://doi.org/10.1103/physrevd.106.104031
Publikováno v:
Phys.Rev.D
Phys.Rev.D, 2019, 100 (12), pp.124015. ⟨10.1103/PhysRevD.100.124015⟩
Physical Review D
Physical Review D, American Physical Society, 2019, 100 (12), pp.124015. ⟨10.1103/PhysRevD.100.124015⟩
Phys.Rev.D, 2019, 100 (12), pp.124015. ⟨10.1103/PhysRevD.100.124015⟩
Physical Review D
Physical Review D, American Physical Society, 2019, 100 (12), pp.124015. ⟨10.1103/PhysRevD.100.124015⟩
For a Schwarzchild black hole of mass $M$, we consider a test particle falling from rest at infinity and becoming trapped, at late time, on the unstable circular orbit of radius $r=4GM/c^2$. When the particle is endowed with a small mass, $\mu\ll M$,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8839922136bc99e32bf40904ea10b349
https://doi.org/10.1103/physrevd.100.124015
https://doi.org/10.1103/physrevd.100.124015
Autor:
Adam Pound, Leor Barack
[Abridged] This review surveys the theory of gravitational self-force in curved spacetime and its application to the gravitational two-body problem in the extreme-mass-ratio regime. We first lay the relevant formal foundation, describing the rigorous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d54bd627acc5d35e8a7a1687394e0a1b
Autor:
Paco Giudice, Leor Barack
We present a new method for calculation of the gravitational self-force (GSF) in Kerr geometry, based on a time-domain reconstruction of the metric perturbation from curvature scalars. In this approach, the GSF is computed directly from a certain sca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56d03fdb95bb4fda82c684b0a4d250dc
Vacuum perturbations of the Kerr metric can be reconstructed from the corresponding perturbation in either of the two Weyl scalars $\psi_0$ or $\psi_4$, using a procedure described by Chrzanowski and others in the 1970s. More recent work, motivated w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1dbc5fdd25c66ac644f5a27b357f454b
http://arxiv.org/abs/1609.01227
http://arxiv.org/abs/1609.01227
Publikováno v:
Physical Review D. 92
It is known that a near-extremal Kerr black hole can be spun up beyond its extremal limit by capturing a test particle. Here we show that overspinning is always averted once back-reaction from the particle's own gravity is properly taken into account
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6bcd7fac9a896c1c02bba3fecf5dd0f
https://doi.org/10.1103/physrevd.92.084044
https://doi.org/10.1103/physrevd.92.084044
Publikováno v:
Physical Review D
Physical Review D, American Physical Society, 2015, 91 (12), ⟨10.1103/PhysRevD.91.124014⟩
Physical Review D, 2015, 91 (12), ⟨10.1103/PhysRevD.91.124014⟩
Physical Review D, American Physical Society, 2015, 91 (12), ⟨10.1103/PhysRevD.91.124014⟩
Physical Review D, 2015, 91 (12), ⟨10.1103/PhysRevD.91.124014⟩
The gravitational self-force (GSF) and post-Newtonian (PN) schemes are complementary approximation methods for modelling the dynamics of compact binary systems. Comparison of their results in an overlapping domain of validity provides a crucial test
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3dfef7401eba2ceb2ec79f1f4da187ff
https://hal.archives-ouvertes.fr/hal-02482501
https://hal.archives-ouvertes.fr/hal-02482501
Autor:
Marta Colleoni, Leor Barack
We study the scenario in which a massive particle is thrown into a rapidly rotating Kerr black hole in an attempt to spin it up beyond its extremal limit, challenging weak cosmic censorship. We work in black-hole perturbation theory, and focus on non
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::38c1fb1d817e48fbd74df4f710a25199
http://arxiv.org/abs/1501.07330
http://arxiv.org/abs/1501.07330
Autor:
Hiroyuki Nakano, Soichiro Isoyama, Leor Barack, Alexandre Le Tiec, Takahiro Tanaka, Sam R. Dolan, Abhay Shah, Niels Warburton
Publikováno v:
Physical Review Letters
Physical Review Letters, American Physical Society, 2014, 113 (16), ⟨10.1103/PhysRevLett.113.161101⟩
Physical Review Letters, American Physical Society, 2014, 113 (16), ⟨10.1103/PhysRevLett.113.161101⟩
For a self-gravitating particle of mass ��in orbit around a Kerr black hole of mass M >> ��, we compute the O(��/M) shift in the frequency of the innermost stable circular equatorial orbit (ISCEO) due to the conservative piece of the grav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::244565951f40a84e051e2e900a35d47e
https://hal.archives-ouvertes.fr/hal-02557330
https://hal.archives-ouvertes.fr/hal-02557330
Calculations of the gravitational self-force (GSF) in curved spacetime require as input the metric perturbation in a sufficiently regular gauge. A basic challenge in the program to compute the GSF for orbits around a Kerr black hole is that the stand
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84ead87a0594e9bc1c7f6c3b20a98922
https://eprints.soton.ac.uk/369457/
https://eprints.soton.ac.uk/369457/