TURSUNOV, Arman, Martin KOLOŠ, Zdeněk STUCHLÍK a Dmitri V. GAL'TSOV. Radiation Reaction of Charged Particles Orbiting a Magnetized Schwarzschild Black Hole. Astrophysical Journal. roč. 861, č. 1, s. "2-1"-"2-16", 16 s. ISSN 0004-637X. doi:10.3847/1538-4357/aac7c5. 2018.
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Základní údaje
Originální název Radiation Reaction of Charged Particles Orbiting a Magnetized Schwarzschild Black Hole
Autoři TURSUNOV, Arman (860 Uzbekistán, garant, domácí), Martin KOLOŠ (203 Česká republika, domácí), Zdeněk STUCHLÍK (203 Česká republika, domácí) a Dmitri V. GAL'TSOV (643 Rusko).
Vydání Astrophysical Journal, 2018, 0004-637X.
Další údaje
Originální jazyk angličtina
Typ výsledku Článek v odborném periodiku
Obor 10308 Astronomy
Stát vydavatele Spojené státy
Utajení není předmětem státního či obchodního tajemství
WWW URL
Kód RIV RIV/47813059:19240/18:A0000257
Organizační jednotka Filozoficko-přírodovědecká fakulta v Opavě
Doi http://dx.doi.org/10.3847/1538-4357/aac7c5
UT WoS 000436539700002
Klíčová slova anglicky accretion; accretion disks; black hole physics; magnetic fields; radiation mechanisms: non-thermal; relativistic processes
Příznaky Mezinárodní význam, Recenzováno
Návaznosti GB14-37086G, projekt VaV. GJ16-03564Y, projekt VaV.
Změnil Změnil: RNDr. Arman Tursunov, Ph.D., učo 39715. Změněno: 23. 4. 2020 14:09.
Anotace
In many astrophysically relevant situations, radiation-reaction forces acting upon a charge cannot be ignored, and the question of the location and stability of circular orbits in such a regime arises. The motion of a point charge with radiation reaction in flat spacetime is described by the Lorenz-Dirac (LD) equation, while in curved spacetime it is described by the DeWitt-Brehme (DWB) equation containing the Ricci term and a tail term. We show that for the motion of elementary particles in vacuum metrics, the DWB equation can be reduced to the covariant form of the LD equation, which we use here. Generically, the LD equation is plagued by runaway solutions, so we discuss computational ways of avoiding this problem when constructing numerical solutions. We also use the first iteration of the covariant LD equation, which is the covariant Landau-Lifshitz equation, comparing the results of these two approaches and showing the smallness of the third-order Schott term in the ultrarelativistic case. We calculate the corresponding energy and angular momentum loss of a particle and study the damping of charged particle oscillations around an equilibrium radius. We find that, depending on the orientation of the Lorentz force, the oscillating charged particle either spirals down to the black hole or stabilizes the circular orbit by decaying its oscillations. The latter case leads to the interesting new result of the particle orbit shifting outwards from the black hole. We also discuss the astrophysical relevance of the presented approach and provide estimates of the main parameters of the model.
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