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arXiv:0706.2548 (astro-ph)
[Submitted on 18 Jun 2007]

Title:WSRT Faraday tomography of the Galactic ISM at λ\sim 0.86 m

Authors:D.H.F.M. Schnitzeler, P. Katgert, A.G. de Bruyn
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Abstract: We investigate the distribution and properties of Faraday rotating and synchrotron emitting regions in the Galactic ISM in the direction of the Galactic anti-centre. We apply Faraday tomography to a radio polarization dataset that we obtained with the WSRT. We developed a new method to calculate a linear fit to periodic data, which we use to determine rotation measures from our polarization angle data. From simulations of a Faraday screen + noise we could determine how compatible the data are with Faraday screens. An unexpectedly large fraction of 14% of the lines-of-sight in our dataset show an unresolved main component in the Faraday depth spectrum. For lines-of-sight with a single unresolved component we demonstrate that a Faraday screen in front of a synchrotron emitting region that contains a turbulent magnetic field component can explain the data.
Comments: 5 pages, 5 figures. Accepted for publication as a Letter to the Editor in A&A
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:0706.2548 [astro-ph]
  (or arXiv:0706.2548v1 [astro-ph] for this version)
  https://doi.org/10.48550/arXiv.0706.2548
Related DOI: https://doi.org/10.1051/0004-6361%3A20077635

Submission history

From: Dominic Schnitzeler [view email]
[v1] Mon, 18 Jun 2007 20:03:09 UTC (95 KB)
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