Počet záznamů: 1  

Oblique magnetic fields and the role of frame dragging

  1. 1.
    0518069 - ASÚ 2020 RIV DE eng J - Článek v odborném periodiku
    Karas, Vladimír - Kopáček, Ondřej - Kunneriath, D. - Tahamtan, Tayebeh
    Oblique magnetic fields and the role of frame dragging.
    Astronomische Nachrichten. Roč. 340, 1-3 (2019), s. 100-104. ISSN 0004-6337. E-ISSN 1521-3994.
    [IWARA - International Workshop on Astronomy and Relativistic Astrophysics /8./. Ollantaytambo, 08.08.2018-15.08.2018]
    Institucionální podpora: RVO:67985815
    Klíčová slova: accretion disks * black holes * general relativity
    Obor OECD: Astronomy (including astrophysics,space science)
    Impakt faktor: 1.064, rok: 2019
    Způsob publikování: Open access

    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.
    Trvalý link: http://hdl.handle.net/11104/0303260

     
    Název souboruStaženoVelikostKomentářVerzePřístup
    518069.pdf14.1 MBVydavatelský postprintpovolen
     
Počet záznamů: 1  

  Tyto stránky využívají soubory cookies, které usnadňují jejich prohlížení. Další informace o tom jak používáme cookies.