The Accretion of Fuel at the Disk-Halo Interface

Details The Accretion of Fuel at the Disk-Halo Interface The Accretion of Fuel at the Disk-Halo Interface

2009-07-06

arxiv.org/abs/0907.1023v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

7.5 pages, 4 figures, invited review for The Role of the Disk-Halo Interaction in Galaxy Evolution: Outflow vs. Infall?, ed. M

Scientific paper

We discuss the support for the cooling of gas directly at the disk-halo interface as a mechanism to continually fuel a galaxy. This may be an important reservoir as there is not enough cold gas observed in galaxy halos and simulations indicate the existing cold clouds will be rapidly destroyed as they move through the surrounding halo medium. We show possible evidence for a net infall of the WIM layer in the Milky Way, simulation results showing the recooling of warm clouds at the disk-halo interface, and GALFA HI data of small, cold HI clouds that could represent this recooling.

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