Atomic hydrogen in a galactic center outflow

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Abstract

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 ∼14 km s -1, 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 ∼200 km s-1 in a Galactic wind. © 2013. The American Astronomical Society. All rights reserved.

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McClure-Griffiths, N. M., Green, J. A., Hill, A. S., Lockman, F. J., Dickey, J. M., Gaensler, B. M., & Green, A. J. (2013). Atomic hydrogen in a galactic center outflow. Astrophysical Journal Letters, 770(1). https://doi.org/10.1088/2041-8205/770/1/L4

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