Faraday tomography of the SS433 jet termination region

Haruka Sakemi, Mami Machida, Takumi Ohmura, Shinsuke Ideguchi, Yoshimitsu Miyashita, Keitaro Takahashi, Takuya Akahori, Hiroki Akamatsu, Hiroyuki Nakanishi, Kohei Kurahara, Jamie Farnes

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


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.

Original languageEnglish
Article number137
Issue number4
Publication statusPublished - Dec 9 2018

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics


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