Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...20311204l&link_type=abstract
American Astronomical Society Meeting 203, #112.04; Bulletin of the American Astronomical Society, Vol. 35, p.1384
Astronomy and Astrophysics
Astronomy
Scientific paper
We review recent VLA observations of the Galactic Center region at 90 and 6 cm which reveal a new population of low surface brightness nonthermal filaments. The nonthermal filaments are magnetic structures tens of pc long and only a fraction of pc wide. They are unique to the Galactic Center and are the primary tracer of the topology of the GC magnetic field. The new observations show that the phenomenon extends 300 pc along the galactic plane. Furthermore, although the majority of the brighter nonthermal filaments are aligned perpendicular to the Galactic plane the newly discovered filaments exhibit a wider variety of orientations. A filament was found at a 45 degree angle to the plane and another system of filaments runs parallel to the Galactic plane. These results suggest that the GC magnetic field has non-poloidal components and is more complex that a simple globally ordered dipole.
Basic research in radio astronomy at the Naval Research Laboratory is made possible by support from the Office of Naval Research.
Kassim Namir E.
LaRosa Ted N.
Lazio Joseph T. W.
Nord Michael E.
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