Absorption of the Linear Polarization of the Galactic Background Radiation by the $\lambda$21-cm Line of HI

Abstract

Absorption lines at $\lambda$ 21-cm are detected in the Stokes Q and U components of the Galactic synchrotron background. The lower limit distance implied for the emission region is 2 kpc in the direction (l,b) = (329.5${}^{\circ }$,+1.15${}^{\circ }$). The Australia Telescope Compact Array has the capability of mapping this absorption over large areas of the Galactic plane. Observations like these have the potential to reveal the three dimensional structure of the Galactic synchrotron emission throughout the Milky Way disk.

13 pages, 3 figures, Latex, see http://ast1.spa.umn.edu/john/Galpol.html to be published in Astrophysical Journal, 1997 October 10

Cited by in corpus (10)

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• Observations of magnetic fields in the Milky Way and in nearby galaxies with a Square Kilometre Array
• Two Large HI Shells in the Outer Galaxy near l=279 degrees
• A New Distance to the Supernova Remnant DA 530 Based on HI Absorption of Polarized Emission