Near-infrared Polarimetry toward the Galactic Center - Magnetic Field Configuration in the Central One Degree Region -

Details Near-infrared Polarimetry toward the Galactic Center - Magnetic Field Configuration in the Central One Degree Region - Near-infrared Polarimetry toward the Galactic Center - Magnetic Field Configuration in the Central One Degree Region -

2010-01-29

arxiv.org/abs/1001.5337v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

2 pages, 1 figure. Proceedings article for the Galactic Center Workshop 2009, Shanghai. For higher resolution, see http://ww

Scientific paper

We present a NIR polarimetric map of the 1deg by 1deg region toward the Galactic center. Comparing Stokes parameters between highly reddened stars and less reddened ones, we have obtained a polarization originating from magnetically aligned dust grains at the central region of our Galaxy. The distribution of position angles shows a peak at the parallel direction to the Galactic plane, suggesting a toroidal magnetic field configuration. However, at high Galactic latitudes, the peak of the position angles departs from the direction of the Galactic plane. This may be a transition of a large-scale magnetic field configuration from toroidal to poloidal.

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