Magnetic field analysis of the bow and terminal shock of the SS 433 jet

Haruka Sakemi, Mami Machida, Takuya Akahori, Hiroyuki Nakanishi, Hiroki Akamatsu, Kohei Kurahara, Jamie Farnes

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We report a polarization analysis of the eastern region of W 50, observed with the Australia Telescope Compact Array (ATCA) at 1.4-3.0 GHz. In order to study the physical structures in the region where the SS 433 jet and W 50 interact, we obtain an intrinsic magnetic field vector map of that region. We find that the orientation of the intrinsic magnetic field vectors are aligned along the total intensity structures, and that there are characteristic, separate structures related to the jet, the bow shock, and the terminal shock. The Faraday rotation measures (RMs), and the results of Faraday tomography suggest that a high-intensity, filamentary structure in the north-south direction of the eastern-edge region can be separated into at least two parts to the north and south. The results of Faraday tomography also show that there are multiple components along the line of sight and/or within the beam area. In addition, we analyze the X-ray ring-like structure observed with XMM-Newton. While the possibility still remains that this X-ray ring is “real”, it seems that the structure is not ring-like at radio wavelengths. Finally, we suggest that the structure is a part of the helical structure that coils the eastern ear of W 50.

Original languageEnglish
Article numberpsy003
JournalPublications of the Astronomical Society of Japan
Issue number2
Publication statusPublished - Mar 1 2018

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


Dive into the research topics of 'Magnetic field analysis of the bow and terminal shock of the SS 433 jet'. Together they form a unique fingerprint.

Cite this