Taverna, R;
Turolla, R;
Zane, S;
Suleimanov, V;
Potekhin, AY;
(2020)
Polarized emission from strongly magnetized sources.
In:
Proceedings of the International Astronomical Union.
(pp. pp. 276-279).
Cambridge University Press
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Abstract
Anomalous X-ray pulsars (AXPs) and Soft gamma repeaters (SGRs) form together a single class of astrophysical sources, commonly associated to magnetars. New-generation X-ray polarimeters will play a key role in assessing the nature of these sources by directly probing the star magnetic field. In the highly magnetized environment radiation is expected to be strongly polarized and such a measure will be easily within reach of IXPE and eXTP. Polarization measurements will eventually confirm the presence of ultra-strong magnetic fields, probing the magnetar scenario. In this work we will discuss theoretical expectations for the polarization signature of AXPs and SGRs and present numerical simulations for the detector response of the polarimeters currently under construction. We will also show how these sources can be used to test vacuum birefringence, a QED effect predicted by Heisemberg and Euler in the Thirties and not experimentally verified as yet.
| Type: | Proceedings paper |
|---|---|
| Title: | Polarized emission from strongly magnetized sources |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1017/S174392132200028X |
| Publisher version: | https://doi.org/10.1017/S174392132200028X |
| Language: | English |
| Additional information: | © The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10170915 |
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