Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...333..729w&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 333, Oct. 15, 1988, p. 729-734.
Astronomy and Astrophysics
Astronomy
37
Cosmic Dust, Far Infrared Radiation, Galactic Nuclei, Infrared Sources (Astronomy), Linear Polarization, Thermal Emission, H Ii Regions, Interstellar Magnetic Fields, Interstellar Matter, Star Clusters
Scientific paper
The first detection of linear polarization of the far-infrared (100-micron) radiation from the about 3-pc-diameter dust ring surrounding the galactic nucleus is reported. The percentage of polarization is between 1 and 2 percent at the three measured positions. It is argued that the polarized radiation is produced by thermal emission from elongated interstellar grains oriented by the local magnetic field. The dust ring is optically thin at 100 microns; therefore the observations sample dust through the entire depth of the cloud and are free of confusing effects due to embedded sources, scattering, or selective absorption. These data provide the first information about the configuration of the magnetic field in the dust ring.
Davidson Jacqueline A.
Hildebrand Roger H.
Morris Marita
Novak Giles
Platt Stephen R.
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