Dept Colloquium: Adam Leroy, The Ohio State University

New Views of Dust, Stellar Feedback, and the Interstellar Medium

Speaker: Adam Leroy, The Ohio State University

Abstract: Galaxies grow and stars form from a complex interplay of gravity, stellar feedback, and dynamical processes in the interstellar medium (ISM). I will present some highlights from recent surveys of nearby galaxies that aim to resolve the individual units of this gas-star formation-feedback cycle. I will highlight recent results from the PHANGS JWST imaging surveys that survey infrared emission from a representative sample of star forming galaxies at very high resolution. These observations paint a picture of the dynamic life cycle of small dust grains and open new avenues to trace the structure and properties of the ISM. I will also show early results from a major new Jansky Very Large Array survey of the atomic gas in the nearest galaxies. This “Local Group L Band Survey” reveals the structure of the volume-filling atomic gas at unprecedented resolution < 25 pc in Andromeda, M33, and Local Group dwarf galaxies, and offers a path to understand molecular cloud formation, stellar feedback, and the regulation of star formation. There will be pretty picture of galaxies.

Host: Dr. Alberto Bolatto