Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-27T19:56:19.976Z Has data issue: false hasContentIssue false
  • English
  • Français

Force-free and twisted, relativistic neutron star magnetosphere

Published online by Cambridge University Press:  27 February 2023

Dimitris Ntotsikas Open the ORCID record for Dimitris Ntotsikas [Opens in a new window]  and
Konstantinos N. Gourgouliatos Open the ORCID record for Konstantinos N. Gourgouliatos [Opens in a new window]
Dimitris Ntotsikas
Affiliation:
University Of Patras, Department Of Physics, Patras, 26504, Greece www.astro.upatras.gr email: [email protected]
Konstantinos N. Gourgouliatos
Affiliation:
University Of Patras, Department Of Physics, Patras, 26504, Greece www.astro.upatras.gr email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In this poster we present the structure of an axisymmetric, force-free magnetosphere of a twisted, aligned rotating dipole within a corotating plasma-filled magnetosphere. We explore various profiles for the twist. We find that as the current increases more field lines cross the light cylinder leading to more efficient spin-down. Moreover, we notice that the twist cannot be increased indefinitely and after a finite twist of about π/2 the field becomes approximately radial. This could have implications for torque variations of magnetars related to outbursts.

Keywords

stars: neutron(magnetohydrodynamics:) MHDmagnetic fields
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 16 , Symposium S363: Neutron Star Astrophysics at the Crossroads: Magnetars and the Multimessenger Revolution , June 2020 , pp. 338 - 339
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

References

Akgün, T., Cerdá-Durán, P., Miralles, J. A., & Pons, J. A. 2018, The force-free twisted magnetosphere of a neutron star – II. Degeneracies of the Grad–Shafranov equation. Mon. Not. Roy. Astron. Soc., 474(1), 625–635.CrossRefGoogle Scholar
Contopoulos, I., Kazanas, D., & Fendt, C. 1999, The axisymmetric pulsar magnetosphere. The Astrophysical Journal, 511(1), 351.CrossRefGoogle Scholar
Goldreich, P. & Julian, W. H. 1969, Pulsar Electrodynamics. Astrophys. J., 157, 869.CrossRefGoogle Scholar
Gourgouliatos, K. & Lynden-Bell, D. 2008, Fields from a relativistic magnetic explosion. Monthly Notices of the Royal Astronomical Society, 391(1), 268–282.Google Scholar
Gourgouliatos, K. N. & Lynden-Bell, D. 2019, Coupled axisymmetric pulsar magnetospheres. Monthly Notices of the Royal Astronomical Society, 482(2), 1942–1954.CrossRefGoogle Scholar
Lynden-Bell, D. & Boily, C. 1994, Self-Similar Solutions up to Flashpoint in Highly Wound Magnetostatics. Mon. Not. Roy. Astron. Soc., 267, 146.Google Scholar
Parfrey, K., Beloborodov, A. M., & Hui, L. 2013, Dynamics of Strongly Twisted Relativistic Magnetospheres. Astrophys. J., 774(2), 92.CrossRefGoogle Scholar
Tong, H. 2019, Large polar caps for twisted magnetosphere of magnetars. Monthly Notices of the Royal Astronomical Society, 489(3), 3769–3777.Google Scholar
Viganò, D. 2013, Magnetic fields in neutron stars. arXiv preprint arXiv:1310.1243,.Google Scholar