Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.1413p&link_type=abstract
American Astronomical Society, AAS Meeting #211, #14.13; Bulletin of the American Astronomical Society, Vol. 39, p.761
Astronomy and Astrophysics
Astronomy
Scientific paper
As a group of stars at a known distance without intrinsic polarization, open clusters are expected to serve as excellent probes of the 3D distribution of the Galactic magnetic field. We present a preliminary study of twelve optically-selected open clusters in the second and third Galactic quadrants as a pathfinder for a larger study in the GPIPS (Galactic Plane Infrared Polarization Survey) first quadrant region. H-band (1.6 microns) linear polarimetry data were acquired using the Mimir near-infrared instrument on the 1.8m Perkins Telescope located outside Flagstaff, Arizona. The clusters were selected to represent the large range in distance (850 - 5800 pc) and reddening (E(B-V)= 0.1 - 0.7 mag) expected for lines of sight in the GPIPS region. We present polarimetric, and hence magnetic field, results toward individual clusters as well as results for the open cluster sample in its entirety.
This work is partially supported by NSF grants AST-0440936 and -0607500.
Clemens Dan P.
Pinnick April
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