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Statements

Subject Item
n2:RIV%2F67985815%3A_____%2F14%3A00438297%21RIV15-GA0-67985815
rdf:type
n5:Vysledek skos:Concept
dcterms:description
Magnetic null points can develop near the ergosphere boundary of a rotating black hole due to the combined effects of a strong gravitational field and the frame-dragging mechanism. The induced electric component does not vanish, and an efficient process of particle acceleration can occur. Furthermore, the effect of the imposed (weak) magnetic field can trigger the onset of chaos. The model set-up appears to be relevant for low-accretion-rate nuclei of some galaxies which exhibit episodic accretion events (such as the Milky Way’s supermassive black hole) embedded in a large-scale magnetic field of external origin. We review our recent results and we give additional context for future work focused on the role of gravito-magnetic effects caused by the rotation of the black hole. While the test motion is strictly regular in the classical black hole space-time, with and without the effects of rotation or an electric charge, gravitational perturbations and imposed external electromagnetic fields may lead to chaos. Magnetic null points can develop near the ergosphere boundary of a rotating black hole due to the combined effects of a strong gravitational field and the frame-dragging mechanism. The induced electric component does not vanish, and an efficient process of particle acceleration can occur. Furthermore, the effect of the imposed (weak) magnetic field can trigger the onset of chaos. The model set-up appears to be relevant for low-accretion-rate nuclei of some galaxies which exhibit episodic accretion events (such as the Milky Way’s supermassive black hole) embedded in a large-scale magnetic field of external origin. We review our recent results and we give additional context for future work focused on the role of gravito-magnetic effects caused by the rotation of the black hole. While the test motion is strictly regular in the classical black hole space-time, with and without the effects of rotation or an electric charge, gravitational perturbations and imposed external electromagnetic fields may lead to chaos.
dcterms:title
Oblique magnetic fields and the role of frame dragging near a rotating black hole Oblique magnetic fields and the role of frame dragging near a rotating black hole
skos:prefLabel
Oblique magnetic fields and the role of frame dragging near a rotating black hole Oblique magnetic fields and the role of frame dragging near a rotating black hole
skos:notation
RIV/67985815:_____/14:00438297!RIV15-GA0-67985815
n3:aktivita
n14:I n14:P
n3:aktivity
I, P(GB14-37086G), P(LH14049)
n3:cisloPeriodika
6
n3:dodaniDat
n8:2015
n3:domaciTvurceVysledku
n6:5011833 n6:6172059 n6:5178711 n6:2520400
n3:druhVysledku
n13:J
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n9:predkladatel
n3:idSjednocenehoVysledku
33632
n3:idVysledku
RIV/67985815:_____/14:00438297
n3:jazykVysledku
n18:eng
n3:klicovaSlova
black holes; accretion discs
n3:klicoveSlovo
n10:accretion%20discs n10:black%20holes
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[DB770F14714C]
n3:nazevZdroje
Acta polytechnica
n3:obor
n17:BN
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
4
n3:projekt
n7:LH14049 n7:GB14-37086G
n3:rokUplatneniVysledku
n8:2014
n3:svazekPeriodika
54
n3:tvurceVysledku
Karas, Vladimír Hamerský, Jaroslav Kunneriath, Devaky Kopáček, Ondřej
s:issn
1210-2709
s:numberOfPages
16
n4:doi
10.14311/AP.2014.54.0398