Romeel Dave and I recently edited a book on Gas Accretion onto Galaxies, published by Springer. This is a contributed volume with 15 chapters written by 15 authors reviewing the subject of how galaxies get the fuel they need to form stars. Find the chapters here.
I'm the Principal Investigator of two HST program totaling 69 orbits to study the Galactic Center region in UV absorption. Our results dicussing the absorption-line properties of the biconical outflow are described in a series of papers in the Astrophysical Journal.
The Magellanic Stream is a giant tidal tail of gas stipped out the Magellanic Clouds and now orbiting the Milky Way. See the Annual Reviews article I wrote with Elena D'Onghia on this extraordinary object or the press releases referred to below.
The Galactic nuclear wind is feeding the giant Fermi Bubbles with new material. Our Galactic Center program has led to two NASA press releases, one in 2015 on the discovery of the wind in UV absorption (click here) and one in 2017 on the northern sky survey (click here ).
This huge network of gas clouds on either side of the Magellanic Clouds holds clues to the ways that dwarf galaxies interact and feed their massive neighbors. We explore its origin using chemical composition analyses with the Hubble and the Green Bank Telescope. See NASA press releases from 2013 and 2018.
The enigmatic Smith Cloud is a massive infalling gas clump that is close to impacting the Galactic disk. Its origin is unknown. We used Hubble to measure its chemical compostion and kinematics and probe its source. See our 2016 NASA press release (click here).