Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Semerak, Oldrich"'
We present a new method for generating the gravitational field of thin disks within the Weyl class of static and axially symmetric spacetimes. Such a gravitational field is described by two metric functions: one satisfies the Laplace equation and rep
Externí odkaz:
http://arxiv.org/abs/2310.16669
Publikováno v:
Phys. Rev. D 97, 084023 (2018)
The Mathisson-Papapetrou-Dixon (MPD) equations, providing the "pole-dipole" description of spinning test particles in general relativity, have to be supplemented by a condition specifying the worldline that will represent the history of the studied b
Externí odkaz:
http://arxiv.org/abs/1712.07281
Autor:
Semerák, Oldřich
Publikováno v:
Phys. Rev. D 92, 124036 (2015)
In a previous paper, we considered the motion of massive spinning test particles in the "pole-dipole" approximation, as described by the Mathisson--Papapetrou--Dixon (MPD) equations, and examined its properties in dependence on the spin supplementary
Externí odkaz:
http://arxiv.org/abs/1512.06253
Autor:
Semerák, Oldřich, Suková, Petra
"Almost all" seems to be known about isolated stationary black holes in asymptotically flat space-times and about the behaviour of {\em test} matter and fields in their backgrounds. The black holes likely present in galactic nuclei and in some X-ray
Externí odkaz:
http://arxiv.org/abs/1509.08536
Autor:
Semerak, Oldrich
Publikováno v:
ApJ, 800, 77 (2015)
A short formula is suggested which approximates photon trajectories in the Schwarzschild field better than other simple prescriptions from the literature. We compare it with various "low-order competitors", namely with those following from exact form
Externí odkaz:
http://arxiv.org/abs/1412.5650
Publikováno v:
MNRAS, 2015, vol. 446, p. 2317-2329
Motivated by the picture of a thin accretion disc around a black hole, radiating mainly in the direction perpendicular to its plane, we study the motion of test particles interacting with a test geodesic radiation flux originating in the equatorial p
Externí odkaz:
http://arxiv.org/abs/1412.5639
Publikováno v:
Class. Quantum Grav. 28, 245019 (2011)
Motion of massive test particles in the nonvacuum spherically symmetric radiating Vaidya spacetime is investigated, allowing for physical interaction of the particles with the radiation field in terms of which the source energy-momentum tensor is int
Externí odkaz:
http://arxiv.org/abs/1408.4956
Publikováno v:
Class. Quantum Grav. 28, 035008 (2011)
We study the motion of a test particle in a stationary, axially and reflection symmetric spacetime of a central compact object, as affected by interaction with a test radiation field of the same symmetries. Considering the radiation flux with fixed b
Externí odkaz:
http://arxiv.org/abs/1408.4945
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