Churazov, Eugene;
Khabibullin, Ildar;
Barnouin, Thibault;
Bucciantini, Niccolo;
Costa, Enrico;
Di Gesu, Laura;
Di Marco, Alessandro;
... Zane, Silvia; + view all
(2024)
Pulsar-wind-nebula-powered Galactic center X-ray filament G0.13–0.11.
Astronomy & Astrophysics (A&A)
, 686
, Article A14. 10.1051/0004-6361/202349080.
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Abstract
We report the discovery of X-ray polarization from the X-ray-bright filament G0.13−0.11 in the Galactic center (GC) region. This filament features a bright, hard X-ray source that is most plausibly a pulsar wind nebula (PWN) and an extended and structured diffuse component. Combining the polarization signal from IXPE with the imaging/spectroscopic data from Chandra, we find that X-ray emission of G0.13−0.11 is highly polarized PD = 57(±18)% in the 3−6 keV band, while the polarization angle is PA = 21 ° ( ± 9 ° ). This high degree of polarization proves the synchrotron origin of the X-ray emission from G0.13−0.11. In turn, the measured polarization angle implies that the X-ray emission is polarized approximately perpendicular to a sequence of nonthermal radio filaments that may be part of the GC Radio Arc. The magnetic field on the order of 100 μG appears to be preferentially ordered along the filaments. The above field strength is the fiducial value that makes our model self-consistent, while the other conclusions are largely model independent.
| Type: | Article |
|---|---|
| Title: | Pulsar-wind-nebula-powered Galactic center X-ray filament G0.13–0.11 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1051/0004-6361/202349080 |
| Publisher version: | http://dx.doi.org/10.1051/0004-6361/202349080 |
| Language: | English |
| Additional information: | Copyright © The Authors 2024. Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This article is published in open access under the Subscribe to Open model. Open access funding provided by Max Planck Society. |
| Keywords: | Magnetic fields / polarization / radiation mechanisms: non-thermal / scattering / X-rays: general |
| 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.ucl.ac.uk/id/eprint/10195876 |
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