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Record Details

Record 16 of 12161
Polarization of the far-infrared emission from the thermal filaments of the Galactic center arc
External Online Source: doi:10.1086/186607
Author and Affiliation:
Morris, M.(California Univ., Los Angeles, United States)
Davidson, J. A.(NASA Ames Research Center, Moffett Field, CA, United States)
Werner, M.(NASA Ames Research Center, Moffett Field)
Dotson, J.(Chicago Univ., IL, United States)
Figer, D. F.(California Univ., Los Angeles)
Hildebrand, R.(Chicago Univ., IL, United States)
Novak, G.(NASA Ames Research Center, Moffett Field, CA, United States)
Platt, S.(Princeton Univ., NJ, United States)
Abstract: The polarization of the 100 micron continuum emission has been measured at 14 positions in the dense, warm molecular cloud associated with the arched filaments, or the 'bridge', of the radio arc near the Galactic center. At all positions the percent polarization is found to be quite large, ranging up to 6.5 percent. The polarization is interpreted in terms of thermal emission by magnetically aligned dust grains. The directions of the polarization vectors then indicate that the magnetic field is (1) parallel to the long dimension of the thermal radio filaments, and (2) very uniform on scales of 1-10 pc. Of several explanations for the inferred field geometry, the simplest is that it results from the unusually large dynamical shear in the emitting cloud.
Publication Date: Nov 01, 1992
Document ID:
19930030043
(Acquired Dec 28, 1995)
Accession Number: 93A14040
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X); 399; 1; p. L63-L66.
Publisher Information: United States
Contract/Grant/Task Num: NSG-2057; NCA5-97
Organization Source: NASA Ames Research Center; Moffett Field, CA, United States
Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
NASA; Washington, DC, United States
NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: FAR INFRARED RADIATION; GALACTIC NUCLEI; GALACTIC STRUCTURE; MILKY WAY GALAXY; POLARIZED RADIATION; RADIO JETS (ASTRONOMY); ASTRONOMICAL MODELS; EMISSION SPECTRA; INTERSTELLAR MAGNETIC FIELDS; THERMAL EMISSION
Imprint And Other Notes: Astrophysical Journal, Part 2 - Letters vol. 399, no. 1 p. L63-L66. Nov. 1, 1992
Availability Source: Other Sources
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