Statistics – Computation
Scientific paper
Oct 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...264..493l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 264, no. 2, p. 493-499.
Statistics
Computation
52
Galactic Nuclei, High Energy Electrons, Magnetic Field Reconnection, Particle Acceleration, Radio Spectra, Computational Astrophysics, Continuous Radiation
Scientific paper
The Arc filaments in the Galactic Center exhibit an inverted radio spectrum with a spectral index alpha is about 0.3 (Snu varies as nu super alpha). Such a spectrum can be interpreted as optically thin synchrotron radiation from monoenergetic electrons. We propose magnetic reconnection as the acceleration process for these particles. Quantitative estimates are in agreement with the observed properties of the Arc. The motion of molecular clouds in a strong poloidal magnetic field serves as trigger mechanism for the magnetic reconnection process, which in general is likely an important acceleration process in galactic nuclei.
Lesch Harald
Reich Wolfgang
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