Kaaret, Philip;
Ferrazzoli, Riccardo;
Silvestri, Stefano;
Negro, Michela;
Manfreda, Alberto;
Wu, Kinwah;
Costa, Enrico;
... Zane, Silvia; + view all
(2024)
X-Ray Polarization of the Eastern Lobe of SS 433.
The Astrophysical Journal Letters
, 961
(1)
, Article L12. 10.3847/2041-8213/ad103b.
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Abstract
How astrophysical systems translate the kinetic energy of bulk motion into the acceleration of particles to very high energies is a pressing question. SS 433 is a microquasar that emits TeV γ-rays indicating the presence of high-energy particles. A region of hard X-ray emission in the eastern lobe of SS 433 was recently identified as an acceleration site. We observed this region with the Imaging X-ray Polarimetry Explorer and measured a polarization degree in the range 38%–77%. The high polarization degree indicates the magnetic field has a well-ordered component if the X-rays are due to synchrotron emission. The polarization angle is in the range −12° to +10° (east of north), which indicates that the magnetic field is parallel to the jet. Magnetic fields parallel to the bulk flow have also been found in supernova remnants and the jets of powerful radio galaxies. This may be caused by interaction of the flow with the ambient medium.
| Type: | Article |
|---|---|
| Title: | X-Ray Polarization of the Eastern Lobe of SS 433 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3847/2041-8213/ad103b |
| Publisher version: | http://dx.doi.org/10.3847/2041-8213/ad103b |
| Language: | English |
| Additional information: | Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10185951 |
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