Constraining Galactic Dynamo Models with NIR Polarimetry

Details Constraining Galactic Dynamo Models with NIR Polarimetry Constraining Galactic Dynamo Models with NIR Polarimetry

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725133p&link_type=abstract

American Astronomical Society, AAS Meeting #217, #251.03; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

Polarization of background starlight is used to probe interstellar magnetic fields. While it has been widely used at optical wavelengths, the near-infrared polarimetric sky remains largely unexplored. In addition to probing longer sightlines, NIR polarimetry is less affected by foreground magnetic structures which allows us to study the large-scale, quiescent Galactic magnetic field. We combine observed NIR polarimetry with simulated observations to constrain dynamo models of the Galactic magnetic field. Polarimetric data were obtained with the Mimir instrument on the Perkins Telescope along a line of constant Galactic longitude (l=150) with pointings spaced between -75This work is supported by NSF grant AST-09-07790.

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