GPIPS Pathfinder for Three Dimensional Magnetic Fields

Details GPIPS Pathfinder for Three Dimensional Magnetic Fields GPIPS Pathfinder for Three Dimensional Magnetic Fields

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725104m&link_type=abstract

American Astronomical Society, AAS Meeting #217, #251.04

Astronomy and Astrophysics

Astronomy

Scientific paper

The purpose of the Galactic Plane Infrared Polarization Survey (GPIPS) is to gain a better understanding of the nature of the magnetic field of our Milky Way. The survey works under the assumption that dust grains align with the Galactic magnetic field and polarize background starlight. GPIPS Pathfinder carries a single 10'x10' GPIPS zone (GP3195) through the entire science analysis process. This reveals what can be learned about the three dimensional structure of the magnetic field in this one zone, as well as guiding later analysis of the full GPIPS data set. H-band polarimetry was obtained using the Mimir instrument on the Perkins 1.83m telescope outside Flagstaff, Arizona. We also used Mimir to obtain medium resolution (R=560-780) H- and K-band spectroscopy of the 23 brightest stars in GP3195. These spectra have been classified using cross-correlation with spectral template grids. Distances to these stars were estimated via spectroscopic parallax. Combining these stellar distances with polarimetry, we seek to resolve the three dimensional magnetic field structure sampled by the GP3195 zone. This research was partially supported by the Boston University Undergraduate Research Opportunities Program (UROP) and AST 09-07790.

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