About: Oblique magnetic fields and the role of frame dragging near a rotating black hole

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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. (en)
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 (en)
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 (en)
skos:notation	RIV/67985815:_____/14:00438297!RIV15-GA0-67985815
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GB14-37086G), P(LH14049)
http://linked.open...iv/cisloPeriodika	6
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Karas, Vladimír Kunneriath, Devaky Kopáček, Ondřej Hamerský, Jaroslav
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Astronomický ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	33632
http://linked.open...ai/riv/idVysledku	RIV/67985815:_____/14:00438297
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	black holes; accretion discs (en)
http://linked.open.../riv/klicoveSlovo	black holes accretion discs
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[DB770F14714C]
http://linked.open...i/riv/nazevZdroje	Acta polytechnica
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Centrum Alberta Einsteina pro gravitaci a astrofyziku Spektrální a časové charakteristiky vesmírných černých děr
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	54
http://linked.open...iv/tvurceVysledku	Karas, Vladimír Kunneriath, Devaky Kopáček, Ondřej Hamerský, Jaroslav
issn	1210-2709
number of pages	16 (xsd:int)
http://bibframe.org/vocab/doi	10.14311/AP.2014.54.0398

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