Plunging neutron stars as origin of organised magnetic field in galactic nuclei

@article{29896,
   author = {Karas, Vladimír and Kopáček, Ondřej and Kunneriath, Devaky and Zajaček, Michal and Araudo, Anabella and Eckart, Andreas and Kovář, Jiří},
   article_number = {2},
   keywords = {magnetic fields; neutron stars; Galactic centre},
   language = {eng},
   issn = {1335-1842},
   journal = {Contributions of the Astronomical Observatory Skalnaté pleso},
   title = {Plunging neutron stars as origin of organised magnetic field in galactic nuclei},
   url = {https://www.ta3.sk/caosp/Eedition/Abstracts/2017/Vol_47/No_2/pp124-132_abstract.html},
   volume = {47},
   year = {2017}
}

TY  - JOUR
ID  - 29896
AU  - Karas, Vladimír - Kopáček, Ondřej - Kunneriath, Devaky - Zajaček, Michal - Araudo, Anabella - Eckart, Andreas - Kovář, Jiří
PY  - 2017
TI  - Plunging neutron stars as origin of organised magnetic field in galactic nuclei
JF  - Contributions of the Astronomical Observatory Skalnaté pleso
VL  - 47
IS  - 2
SP  - 124-132
EP  - 124-132
SN  - 13351842
KW  - magnetic fields
KW  - neutron stars
KW  - Galactic centre
UR  - https://www.ta3.sk/caosp/Eedition/Abstracts/2017/Vol_47/No_2/pp124-132_abstract.html
L2  - https://www.ta3.sk/caosp/Eedition/Abstracts/2017/Vol_47/No_2/pp124-132_abstract.html
N2  - 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.
ER  - 

KARAS, Vladimír, Ondřej KOPÁČEK, Devaky KUNNERIATH, Michal ZAJAČEK, Anabella ARAUDO, Andreas ECKART a Jiří KOVÁŘ. Plunging neutron stars as origin of organised magnetic field in galactic nuclei. \textit{Contributions of the Astronomical Observatory Skalnaté pleso}. roč.~47, č.~2, s.~124-132. ISSN~1335-1842. 2017.