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Progenitors of Magnetars and Hyperaccreting Magnetized Disks

Published online by Cambridge University Press:  21 February 2013

Y. Xie  and
S. N. Zhang
Y. Xie
Affiliation:
National Astronomical Observatories, Chinese Academy Of Sciences, Beijing, 100012, P. R. China email: sourcexieyi@gmail.com
S. N. Zhang
Affiliation:
National Astronomical Observatories, Chinese Academy Of Sciences, Beijing, 100012, P. R. China email: sourcexieyi@gmail.com Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100012, P. R. China email: zhangsn@ihep.ac.cn
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Abstract

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We propose that a magnetar could be formed during the core collapse of massive stars or coalescence of two normal neutron stars, through collecting and inheriting the magnetic fields magnified by hyperaccreting disk. After the magnetar is born, its dipole magnetic fields in turn have a major influence on the following accretion. The decay of its toroidal field can fuel the persistent X-ray luminosity of either an SGR or AXP; however the decay of only the poloidal field is insufficient to do so.

Keywords

Magnetaraccretion diskgamma ray burstsmagnetic fields
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S290: Feeding Compact Objects: Accretion on All Scales , August 2012 , pp. 347 - 348
Copyright
Copyright © International Astronomical Union 2013

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