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Radio pulsar activity and the crustal Hall drift

Geppert, Ulrich R.M.E. and Gil, Janusz and Melikidze, Georgi (2013) Radio pulsar activity and the crustal Hall drift. Monthly Notices of the Royal Astronomical Society, 435 (4), pp. 3262-3271. Oxford University Press. doi: 10.1093/mnras/stt1527. ISSN 0035-8711.



Models of pulsar radio emission that are based on an inner accelerating region require the existence of very strong and small-scale surface magnetic field structures at or near the canonical polar cap. The aim of this paper is to identify a mechanism that creates such field structures and maintains them over a pulsar's lifetime. The likely physical process that can create the required `magnetic spots' is the Hall drift occurring in the crust of a neutron star. It is demonstrated that the Hall drift can produce small-scale strong surface magnetic field anomalies (spots) on time-scales of 104 yr by means of non-linear interaction between poloidal and toroidal components of the subsurface magnetic field. These anomalies are characterized by strengths of about 1014 G and curvature radii of field lines of about 106 cm, both of which are fundamental for generation of observable radio emission.

Item URL in elib:https://elib.dlr.de/84755/
Document Type:Article
Title:Radio pulsar activity and the crustal Hall drift
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Geppert, Ulrich R.M.E.ulrich.geppert (at) dlr.deUNSPECIFIED
Gil, JanuszKepler Institut, Univerity of Zielona Gora, PolenUNSPECIFIED
Melikidze, GeorgiKepler Institut, Univerity of Zielona Gora, PolenUNSPECIFIED
Date:November 2013
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1093/mnras/stt1527
Page Range:pp. 3262-3271
Publisher:Oxford University Press
Keywords:magnetic fields, Pulsars, Neutron Stars, Magnetohydrodynamics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space System Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Space System Technology
DLR - Research theme (Project):R - Vorhaben Systemkonditionierung (old), Systemkonditionierung (old)
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Systemkonditionierung
Deposited By: Geppert, Prof. Dr.rer.nat. habil. Ulrich
Deposited On:07 Nov 2013 09:11
Last Modified:06 Sep 2019 15:17

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