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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%2F67985815%3A_____%2F19%3A00518069" target="_blank" >RIV/67985815:_____/19:00518069 - isvavai.cz</a>

  • Result on the web

    <a href="http://hdl.handle.net/11104/0303260" target="_blank" >http://hdl.handle.net/11104/0303260</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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10308 - Astronomy (including astrophysics,space science)

Result continuities

  • Project

  • 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

    1521-3994

  • 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