Talk page
Title:
Kinematics of Circumgalactic Gas
Speaker:
Abstract:
Most of the baryons associated with galaxy halos reside in the
circumgalactic medium. A significant fraction of the mass is at
temperatures well below the halo virial temperature. What holds
the cool CGM up? I will present new measurements of the kinematics
of circumgalactic gas. The data show that much of the low-ionization
CGM rotates in the same direction as the galactic disk, suggesting
substantial centrifugal support. Disturbances from galactic winds
are also apparent, and I will discuss the empirical constraints on
both gas outflows and inflows. Understanding the hydrodynamics of
the CGM is important because this physics shapes the growth of
galactic disks.
https://www.ias.edu/sns/astrophysics/joint-iaspu-astrophysics-colloquium
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