| Speaker: | Tim Heckman (Johns Hopkins University) |
|---|---|
| Title: | GALACTIC WINDS: Physics, Phenomenology, and Implications |
| Date (JST): | Thu, May 30, 2019, 13:30 - 14:30 |
| Place: | Seminar Room A |
| Related File: | 2341.pdf |
| Abstract: | I will review galactic winds driven by populations of massive stars. I will describe the basic physics that drives winds and dictates their impact on the interstellar and circum-galactic medium. I will describe observations of the multi-phase outflow in the proto-typical starburst galaxy M 82. I will then discuss the systematic dependence of wind properties on such key parameters as the star-formation-rate, galaxy size, and mass (circular velocity), and show that there explain the strong rise in the incidence rate of winds with redshift. I will also compare these empirical scaling relations with sub-grid recipes commonly adopted in models and simulations. Finally, I will describe observations that demonstrate the impact of winds on the chemical evolution of galaxies and on the properties of the circum-galactic medium. |
