Physics
Scientific paper
Apr 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...424l..91s&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 424, no. 2, p. L91-L94
Physics
67
Active Galactic Nuclei, Galactic Structure, Molecular Clouds, Particle Acceleration, Plasmas (Physics), Radio Emission, Relativistic Particles, Synchrotron Radiation, Interferometers, Luminosity, Magnetic Fields, Planetary Temperature, Radiation Pressure, Relativistic Velocity
Scientific paper
Three fields in the molecular cloud M0.20-0.033, located near the midpoint of the filamentary 'Galactic center arc,' have been imaged in the CS J = 2-1 line with the OVRO millimeter interferometer. Several molecular clumps have been found to coincide with the endpoints of a number of the arc's nonthermal filaments (NTFs), suggesting that the relativistic particles present along the filaments originate in these molecular cloudlets. The most striking correlation involves a clump that is elongated along the direction of a pair of NTFs, and that approximately coincides with both their endpoints. These observations thus provide clues to the particle acceleration mechanism operative in the Galactic center arc: magnetic energy is likely liberated as the ambient field, tangled by the clumps' motions, reconnects in the advancing clumps' leading, externally ionized, surface layers.
Morris Mark
Serabyn Eugen
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