CREMASCHINI, Claudio a Zdeněk STUCHLÍK. Carter constant induced mechanism for generation of anisotropic kinetic equilibria in collisionless N-body systems. International Journal of Modern Physics D. roč. 26, č. 2, s. „1750001-1“-„1750001-23“, 23 s. ISSN 0218-2718. doi:10.1142/S0218271817500018. 2017.
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Základní údaje
Originální název Carter constant induced mechanism for generation of anisotropic kinetic equilibria in collisionless N-body systems
Autoři CREMASCHINI, Claudio (380 Itálie, garant, domácí) a Zdeněk STUCHLÍK (203 Česká republika, domácí).
Vydání International Journal of Modern Physics D, 2017, 0218-2718.
Další údaje
Originální jazyk angličtina
Typ výsledku Článek v odborném periodiku
Obor 10308 Astronomy
Stát vydavatele Singapur
Utajení není předmětem státního či obchodního tajemství
WWW International Journal of Modern Physics D
Kód RIV RIV/47813059:19240/17:A0000028
Organizační jednotka Filozoficko-přírodovědecká fakulta v Opavě
Doi http://dx.doi.org/10.1142/S0218271817500018
UT WoS 000395372200005
Klíčová slova anglicky relativistic kinetic theory; collosionless neutral matter; Carter constant; Killing tensors; nonisotropic equilibria
Příznaky Mezinárodní význam, Recenzováno
Návaznosti GB14-37086G, projekt VaV. GP14-07753P, projekt VaV.
Změnil Změnil: RNDr. Jan Hladík, Ph.D., učo 25379. Změněno: 9. 4. 2018 04:19.
Anotace
A new intrinsically-relativistic kinetic mechanism for generation of nonisotropic relativistic kinetic equilibria in collisionless N-body systems is pointed out. The theory is developed in the framework of the covariant Vlasov statistical description. The new effect is based on the constraints placed by the conservation laws of neutral single-particle dynamics in prescribed background curved-spacetimes demonstrating existence of Killing tensors. As an illustration, the particular case of the Kerr spacetime admitting the so-called Carter constant for the particle geodesic motion is considered. The general functional form of the equilibrium kinetic distribution function (KDF) is determined and an explicit realization in terms of Gaussian-like distributions is provided. It is shown that, due to the Carter constant, these equilibrium KDFs exhibit an anisotropic phase-space functional dependence in terms of the single-particle 4-velocity components, giving rise to corresponding nonisotropic continuum fluid fields. The qualitative properties of the equilibrium stress-energy tensor associated with these systems are discussed, with a particular emphasis on the related occurrence of temperature anisotropy effects. The theory is susceptible of astrophysical applications, including in particular the statistical properties of dark matter (DM) halos around stellar-mass or galactic-center black holes.
VytisknoutZobrazeno: 28. 3. 2024 20:09