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.
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Abstract
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/ | ||||||||||||
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Document Type: | Article | ||||||||||||
Title: | Radio pulsar activity and the crustal Hall drift | ||||||||||||
Authors: |
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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 SCOPUS: | Yes | ||||||||||||
In ISI Web of Science: | Yes | ||||||||||||
Volume: | 435 | ||||||||||||
DOI : | 10.1093/mnras/stt1527 | ||||||||||||
Page Range: | pp. 3262-3271 | ||||||||||||
Publisher: | Oxford University Press | ||||||||||||
ISSN: | 0035-8711 | ||||||||||||
Status: | Published | ||||||||||||
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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