Speaker
Description
While gas accretion and feedback are theorized to make significant changes to the state of the circumgalactic medium (CGM) at the disk-CGM interface, the observational evidence to support that is not conclusive. The need of the hour is to measure the properties of the gas in this highly sensitive interface region to connect them to the physics of accretion and outflow. I will discuss the results from our ongoing COS-Disk program, which proves the HI disk-CGM interface. I'll discuss our finding in terms of the signpost of gas accretion and galactic feedback. I'll also show evidence that structures such as high-velocity clouds and extraplanar gas that are thought to be pathways for gas accretion into galaxies are very common for most galaxies, thus strengthening of understanding of their role in feeding galaxies.
| Wish list question? | 8. How do the kinematics of halo gas seen in absorption relate to those of HI seen in emission? |
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