Magnetic Floatation loops in the Galactic Center; A detailed study with Mopra

Details Magnetic Floatation loops in the Galactic Center; A detailed study with Mopra Magnetic Floatation loops in the Galactic Center; A detailed study with Mopra

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007atnf.prop..799t&link_type=abstract

ATNF proposal M235, Semester: April, 2007

Physics

Stellar, Mopra

Scientific paper

Two loops toward the Galactic Center were detected in 12CO(J=1-0) by NANTEN 4m telescope, which have a length of several 100 pc and a very broad velocity dispersion of up to 100 km/s. These features have a very similar shape as those loops observed at the Sun, but the size scale is ~12 orders of magnitude larger than those in the Sun. To explain these structures, we adopted a magnetically floatation model caused by the Parker instability. Numerical simulations of magneto-hydrodynamics indicate the morphology and large velocity gradients within the loops show excellent agreements with the model. The gas in the loop likely flows towards the Galactic plane to cause shock fronts, leading to significant heating of the gas. This model suggests that the model offers a significant clue to solve the long-standing puzzles of the origins of the violent gas motion and the extended warm molecular gas in the Galactic Center.

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