| Issue |
A&A
Volume 401, Number 3, April III 2003
|
|
|---|---|---|
| Page(s) | 1023 - 1026 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20030183 | |
| Published online | 01 April 2003 | |
G0.087-0.087, a highly polarized flat spectrum filament near the Galactic CentreArc*
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
Corresponding author: wreich@mpifr-bonn.mpg.de
Received:
23
January
2003
Accepted:
31
January
2003
32 GHz observations with the Effelsberg 100-m telescope revealed a
highly polarized Galactic Centre filament: G0.087-0.087, running
parallel to the well-known Arc structure. It has a similar flat
spectrum, but it is an order of magnitude weaker. G0.087-0.087 is
about 
or 6.2 pc long and located at the western boundary
of the expanding molecular cloud G0.11-0.11. This unusual cloud
is also visible in X-rays and known to interact on its eastern
periphery with the Arc. Acceleration of highly relativistic particles
at the surface of G0.11-0.11 seems necessary to explain the properties
of both structures. The new filament supports previous findings on the
existence of a strong poloidal magnetic field throughout the Galactic
Centre region.
Key words: Galaxy: center / radiation mechanisms: non-thermal / techniques: polarimetric
© ESO, 2003
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