Parsec-scale structure in galactic disk and halo, from diffuse radio polarization

Details Parsec-scale structure in galactic disk and halo, from diffuse radio polarization Parsec-scale structure in galactic disk and halo, from diffuse radio polarization

2001-09-19

arxiv.org/abs/astro-ph/0109312v1

Astronomy and Astrophysics

Astrophysics

4 pages, to appear in the proceedings of the XVIIth IAP Colloquium "Gaseous Matter in Galaxies and Intergalactic Space", Paris

Scientific paper

We present multi-frequency polarization observations of the diffuse radio synchrotron background modulated by Faraday rotation. No total intensity is observed, indicating that total intensity does not vary on scales below approximately a degree. However, polarized intensity and polarization angle show abundant small-scale structure due to Faraday rotation in the warm ionized disk on small scales. The distribution of Rotation Measures enables us to estimate structure in magnetic field, weighted with electron density, in the warm ionized disk.

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