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| Paper: |
Polarimetry of Extended Galactic Radio Emission—Revealing Magnetic Fields in the Interstellar Medium |
| Volume: |
438, The Dynamic Interstellar Medium: A Celebration of the Canadian Galactic Plane Survey |
| Page: |
261 |
| Authors: |
Landecker, T. L. |
| Abstract: |
Extended polarized radio emission from the Milky Way fills the sky,
and observations of it should be able to provide information on
Galactic magnetic fields with detail limited only by the angular
resolution of the telescope. This potential cannot be realised from
current observations because they do not adequately sample the
frequency structure of the polarized emission, or they lack
information on large-scale structure. I present data from two
DRAO-based surveys, each overcoming one of these limitations. The CGPS
Polarization Survey is the first aperture-synthesis survey of a large
area that incorporates single-antenna data. The Global Magneto-Ionic
Medium Survey (GMIMS) is mapping the entire sky, North and South, with
large single-antenna telescopes delivering spectropolarimetry from
300 MHz to 1.8 GHz. Rotation Measure Synthesis has been applied to
GMIMS data between 1277 and 1740 MHz. From each survey, polarization
structures can be associated with other ISM tracers, yielding magnetic
field configuration and strength in a variety of ISM processes. |
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