Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.0705d&link_type=abstract
American Astronomical Society, 191st AAS Meeting, #07.05; Bulletin of the American Astronomical Society, Vol. 29, p.1219
Astronomy and Astrophysics
Astronomy
Scientific paper
In the past year we have mapped the polarization of thermal emission at 350 \micron\ of 12 galactic molecular clouds with the University of Chicago's array polarimeter Hertz (Schleuning et al 1997, Dowell et al 1997) at the Caltech Submillimeter Observatory. Polarimetry of thermal emission is proving to be a powerful method to investigate magnetic fields (eg Schleuning 1997, Dotson 1996) and dust properties (eg Hildebrand & Dragovan 1995) in molecular clouds. Here we will present polarization maps of the observed sources which include 3 galactic center clouds (the dust ring, M-0.13-0.08, M-0.02-0.07) and several high mass star formation regions (SgrB2, M17, DR21 and NGC 2024). In the elongated clouds DR21 and NGC 2024, the magnetic field is perpendicular to the cloud along its length. In the DR21 Main region, we resolve an apparent hourglass field geometry. We will also briefly discuss global trends observed in the data set.
Dotson Jessie L.
Dowell Charles (Darren)
Hildebrand Roger H.
Novak Giles
Schleuning David A.
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