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arXiv:astro-ph/0309605 (astro-ph)
[Submitted on 23 Sep 2003]

Title:Distribution of Faraday Rotation Measure in Jets from Active Galactic Nuclei I. Prediction from our Sweeping Magnetic Twist Model

Authors:Y. Uchida, H. Kigure, S. Hirose, M. Nakamura, R. Cameron
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Abstract: Using the numerical data of MHD simulation for AGN jets based on our ``sweeping magnetic twist model'', we calculated the Faraday rotation measure (FRM) and the Stokes parameters to compare with observations. We propose that the FRM distribution can be used to discuss the 3-dimensional structure of magnetic field around jets, together with the projected magnetic field derived from the Stokes parameters. In the present paper, we supposed the basic straight part of AGN jet, and used the data of axisymmetric simulation. The FRM distribution we derived has a general tendency to have gradient across the jet axis, which is due to the toroidal component of the helical magnetic field generated by the rotation of the accretion disk. This kind of gradient in the FRM distribution is actually observed in some AGN jets (e.g. Asada et al. 2002), which suggests helical magnetic field around the jets and thus supports our MHD model. Following this success, we are now extending our numerical observation to the wiggled part of the jets using the data of 3-dimensional simulation based on our model in the following paper.
Comments: Accepted for publication in ApJ
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0309605
  (or arXiv:astro-ph/0309605v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0309605
Journal reference: Astrophys.J.600:88-95,2004
Related DOI: https://doi.org/10.1086/379759

Submission history

From: Hiromitsu Kigure [view email]
[v1] Tue, 23 Sep 2003 04:41:39 UTC (272 KB)
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