KARAS, Vladimír, Ondřej KOPÁČEK, Devaky KUNNERIATH, Michal ZAJAČEK, Anabella ARAUDO, Andreas ECKART and Jiří KOVÁŘ. Plunging neutron stars as origin of organised magnetic field in galactic nuclei. Contributions of the Astronomical Observatory Skalnaté pleso. 2017, vol. 47, No 2, p. 124-132. ISSN 1335-1842.
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Basic information
Original name Plunging neutron stars as origin of organised magnetic field in galactic nuclei
Authors KARAS, Vladimír (203 Czech Republic), Ondřej KOPÁČEK (203 Czech Republic), Devaky KUNNERIATH (356 India), Michal ZAJAČEK (703 Slovakia), Anabella ARAUDO (32 Argentina), Andreas ECKART (276 Germany) and Jiří KOVÁŘ (203 Czech Republic, guarantor, belonging to the institution).
Edition Contributions of the Astronomical Observatory Skalnaté pleso, 2017, 1335-1842.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10308 Astronomy
Country of publisher Slovakia
Confidentiality degree is not subject to a state or trade secret
WWW Contributions of the Astronomical Observatory Skalnaté pleso
RIV identification code RIV/47813059:19240/17:A0000029
Organization unit Faculty of Philosophy and Science in Opava
UT WoS 000410733700008
Keywords in English magnetic fields; neutron stars; Galactic centre
Tags International impact, Reviewed
Links GA17-16287S, research and development project.
Changed by Changed by: RNDr. Jan Hladík, Ph.D., učo 25379. Changed: 9/4/2018 03:57.
Abstract
Black holes cannot support their own internal magnetic field like, for example, compact stars can. Despite this fact observations indicate that event horizons of supermassive black holes (SMBH) are threaded by field lines along which plasma streams flow. Various magnetohydrodynamical mechanisms have been suggested to generate turbulent magnetic fields on small scales, however, the origin of the large-scale component is unclear. In this write-up we describe our progress in an on-going work and discuss the possibility of dipole-type magnetic fields being brought onto SMBH by magnetised neutron stars, which are expected to drift inward from a hidden population in the Nuclear Star Cluster. This can contribute to an organised component of the magnetic field on the characteristic length-scale of the stellar size, which thread the horizon during the final stages of the magnetized star plunge into or its close flyby around SMBH. Because of mass size scaling relations for black holes, the effect is more important for lower-mass SMBH.
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