Thursday, November 4, 2010
Faraday Rotation
Whenever I see papers about asymmetries in Faraday rotation or other polarization stuff, I am reminded of a bunch of wacky papers from about five to ten years ago about quasar polarizations. This paper on the other hand argues that the observed Faraday rotation correlations come not from extra physics nor the Galactic magnetic field but from a nearby bubble of HI about 100 pc away toward the Galactic center. The bubble supposedly has compressed the magnetic field on either side of it, increasing its strength and therefore the Faraday rotation. These observations were performed at DRAO in Penticton in the beautiful Okanagan valley of BC.
arXiv:1011.0341 [pdf, ps, other]
Title: Antisymmetry in the Faraday Rotation Sky Caused by a Nearby Magnetized Bubble Authors: M. Wolleben, A. Fletcher, T. L. Landecker, E. Carretti, J. M. Dickey, B. M. Gaensler, M. Haverkorn, N. McClure-Griffiths, W. Reich, A. R. Taylor Comments: Published in Astrophysical Journal Letters 724 (2010) L48-L52 Subjects: Galaxy Astrophysics (astro-ph.GA)
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