Magnetic-Reconnection and Current-Sheet Model for the Radio Arc and Threads in the Galactic Center
Abstract
We propose a new mechanism to explain the radio arc and threads in the Galactic center by current sheets produced by local magnetic shears due to the interaction of a moving cloud and a vertical field based on three-dimensional magnetohydrodynamical simulations. Magnetic reconnection and acceleration of cosmic-ray electrons in the current sheet would result in a high contrast of the radio emissivity inside and outside the arc and threads.
- Publication:
-
Publications of the Astronomical Society of Japan
- Pub Date:
- October 2005
- DOI:
- 10.1093/pasj/57.5.L39
- arXiv:
- arXiv:astro-ph/0507568
- Bibcode:
- 2005PASJ...57L..39S
- Keywords:
-
- Galaxy: center;
- ISM: clouds;
- ISM: jets and outflows;
- ISM: magnetic fields;
- magnetohydrodynamics: MHD simulation;
- Astrophysics
- E-Print:
- PASJ Letters in press, 6 pages, 2 figures