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@article{37842,
author = {Bakala, Pavel and De Falco, Vittorio and Battista, Emmanuele and Goluchová, Kateřina and Lančová, Debora and Falanga, Maurizio and Stella, Luigi},
article_number = {10},
doi = {http://dx.doi.org/10.1103/PhysRevD.100.104053},
keywords = {Poynting-Robertson effect;rotating spherical source;trajectories of test particles;compact objects},
language = {eng},
issn = {2470-0010},
journal = {Physical Review D},
title = {Three-dimensional general relativistic Poynting-Robertson effect. II. Radiation field from a rigidly rotating spherical source},
url = {https://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.104053},
volume = {100},
year = {2019}
}
TY - JOUR
ID - 37842
AU - Bakala, Pavel - De Falco, Vittorio - Battista, Emmanuele - Goluchová, Kateřina - Lančová, Debora - Falanga, Maurizio - Stella, Luigi
PY - 2019
TI - Three-dimensional general relativistic Poynting-Robertson effect. II. Radiation field from a rigidly rotating spherical source
JF - Physical Review D
VL - 100
IS - 10
SP - "104053-1"-"104053-20"
EP - "104053-1"-"104053-20"
SN - 24700010
KW - Poynting-Robertson effect;rotating spherical source;trajectories of test particles;compact objects
UR - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.104053
L2 - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.104053
N2 - We investigate the three-dimensional, general relativistic Poynting-Robertson (PR) effect in the case of rigidly rotating spherical source which emits radiation radially in the local comoving frame. Such radiation field is meant to approximate the field produced by the surface of a rotating neutron star, or by the central radiating hot corona of accreting black holes; it extends the purely radial radiation field that we considered in a previous study. Its angular momentum is expressed in terms of the rotation frequency and radius of the emitting source. For the background we adopt a Kerr spacetime geometry. We derive the equations of motion for test particles influenced by such radiation field, recovering the classical and weak-field approximation for slow rotation. We concentrate on solutions consisting of particles orbiting along circular orbits off and parallel to the equatorial plane, which are stabilized by the balance between gravitational attraction, radiation force and PR drag. Such solutions are found to lie on a critical hypersurface, whose shape may morph from prolate to oblate depending on the Kerr spin parameter and the luminosity, rotation and radius of the radiating sphere. For selected parameter ranges, the critical hypersurface intersects the radiating sphere giving rise to a bulging equatorial region or, alternatively, two lobes above the poles. We calculate the trajectories of test particles in the close vicinity of the critical hypersurface for a selected set of initial parameters and analyze the spatial and angular velocity of test particles captured on the critical hypersurface.
ER -
BAKALA, Pavel, Vittorio DE FALCO, Emmanuele BATTISTA, Kateřina GOLUCHOVÁ, Debora LANČOVÁ, Maurizio FALANGA a Luigi STELLA. Three-dimensional general relativistic Poynting-Robertson effect. II. Radiation field from a rigidly rotating spherical source. \textit{Physical Review D}. 2019, roč.~100, č.~10, s.~''104053-1''-''104053-20'', 20 s. ISSN~2470-0010. Dostupné z: https://dx.doi.org/10.1103/PhysRevD.100.104053.
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