Far-Infrared Polarization by Absorption in the Molecular Cloud Sagittarius B2

Details Far-Infrared Polarization by Absorption in the Molecular Cloud Sagittarius B2 Far-Infrared Polarization by Absorption in the Molecular Cloud Sagittarius B2

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...487..237d&link_type=abstract

Astrophysical Journal v.487, p.237

Astronomy and Astrophysics

Astronomy

22

Galaxy: Center, Infrared: Ism: Continuum, Ism: Dust, Extinction, Ism: Individual Name: Sagittarius B2, Ism: Magnetic Fields, Polarization

Scientific paper

This paper presents a 2' x 2' map of 60 mu m polarization from the core of the massive molecular cloud Sagittarius B2, located near the center of the Galaxy. The measurements were obtained from the Kuiper Airborne Observatory with the array polarimeter Stokes. The polarization (up to 8%) is large compared to the polarization at 115 mu m and, in contrast to other molecular clouds, is greatest toward the peaks in the dust column density. We argue that the far-infrared polarization is due to absorption by aligned dust grains. The magnetic field in the absorbing cloud, as projected onto the plane of the sky, is roughly north-south, making an angle of 54 deg with the Galactic plane.

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