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Galaxies 2018, 6(4), 137; https://doi.org/10.3390/galaxies6040137

Faraday Tomography of the SS433 Jet Termination Region

1
Graduate School of Science, Kyushu University, 744 Motooka Nishi-ku, Fukuoka 819-0395, Japan
2
Department of Physics, Faculty of Sciences, Kyushu University, 744 Motooka Nishi-ku, Fukuoka 819-0395, Japan
3
Department of Astrophysics/IMAPP, Radboud University, PO Box 9010, NL-6500 GL Nijmegen, The Netherlands
4
Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1, Kurokami, Kumamoto 860-8555, Japan
5
Mizusawa VLBI Observatory, National Astronomical Observatory Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
6
SRON Netherlands Institute for Space Research, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands
7
Graduate School of Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan
8
Oxford e-Research Centre (OeRC), Keble Road, Oxford OX1 3QG, UK
*
Author to whom correspondence should be addressed.
Received: 26 October 2018 / Revised: 23 November 2018 / Accepted: 1 December 2018 / Published: 9 December 2018
(This article belongs to the Special Issue The Power of Faraday Tomography)
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Abstract

A jet termination region provides us with useful information about how a jet interacts with the interstellar medium. Identifying the strength and orientation of magnetic fields at the terminal is crucially important to understanding the mechanism of cosmic-ray acceleration. In this article, we report results of our Faraday-tomography analysis of the eastern region of the radio nebula W50, where a jet from the microquasar SS433 seems to terminate. We apply QU-fitting, a method of Faraday-tomography, to data from the Australia Telescope Compact Array (ATCA) at 1.3–3.0 GHz. In the analysis, we distinguish multiple polarized sources along the line of sight. We identify Galactic emission candidates at Faraday depths around 0 rad m−2 and 300 rad m−2. The Galactic emission around 0 rad m−2 is possibly located in front of W50. We also find emission from W50 with Faraday depths between φ = −112 to 228 rad m−2. View Full-Text
Keywords: magnetic fields; polarization; jets and outflows; W50; SS433 magnetic fields; polarization; jets and outflows; W50; SS433
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Sakemi, H.; Machida, M.; Ohmura, T.; Ideguchi, S.; Miyashita, Y.; Takahashi, K.; Akahori, T.; Akamatsu, H.; Nakanishi, H.; Kurahara, K.; Farnes, J. Faraday Tomography of the SS433 Jet Termination Region. Galaxies 2018, 6, 137.

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