Tuesday, April 30, 2013

1304.7538 (N. M. McClure-Griffiths et al.)

Atomic Hydrogen in a Galactic Center Outflow    [PDF]

N. M. McClure-Griffiths, J. A. Green, A. S. Hill, F. J. Lockman, J. M. Dickey, B. M. Gaensler, A. J. Green
We describe a population of small, high velocity, atomic hydrogen clouds, loops, and filaments found above and below the disk near the Galactic Center. The objects have a mean radius of 15 pc, velocity widths of $\sim 14$ km/s and are observed at $|z|$ heights up to 700 pc. The velocity distribution of the clouds shows no signature of Galactic rotation. We propose a scenario where the clouds are associated with an outflow from a central star-forming region at the Galactic Center. We discuss the clouds as entrained material traveling at $\sim 200$ km/s in a Galactic wind.
View original: http://arxiv.org/abs/1304.7538

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