Oblique magnetic fields and the role of frame dragging
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10408436" target="_blank" >RIV/00216208:11320/19:10408436 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=8728vW5GmW" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=8728vW5GmW</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/asna.201913569" target="_blank" >10.1002/asna.201913569</a>
Alternative languages
Result language
angličtina
Original language name
Oblique magnetic fields and the role of frame dragging
Original language description
Magnetic null points can develop near the ergosphere boundary of a rotating black hole through the combined effects of strong gravitational field and the frame-dragging mechanism. The electric component does not vanish in the magnetic null, and an efficient process or particle acceleration can occur. The situation is relevant to starving (low-accretion-rate, such as the Milky Way's supermassive black hole [SMBH]) nuclei of some galaxies that exhibit only episodic accretion events. The presence of the magnetic field of external origin is an important aspect. We propose that such conditions can develop when a magnetized neutron star approaches the SMBH during late stages of its inspiral motion. The field lines of the neutron star dipole thread the black hole's event horizon and rapidly change their connectivity. We compare the case of a dipole-type magnetic field of a sinking and orbiting star near a nonrotating black hole and the near-horizon structure of an asymptotically uniform magnetic field of a distant source near a fast-rotating black hole. Although the two cases are qualitatively different from each other, they both develop magnetically neutral null points near the event horizon.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomische Nachrichten
ISSN
0004-6337
e-ISSN
—
Volume of the periodical
340
Issue of the periodical within the volume
1-3
Country of publishing house
DE - GERMANY
Number of pages
5
Pages from-to
100-104
UT code for WoS article
000468591100019
EID of the result in the Scopus database
2-s2.0-85063473075