Abstract Details
| Name: Sharanya Sur Affiliation: Indian Institute of Astrophysics Conference ID: ASI2016_568 Title : Galaxy outflows without supernovae Authors and Co-Authors : Evan Scannapieco (Arizona State University) Eve C. Ostriker (Princeton University) Abstract Type : Invited Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : High surface density, rapidly star-forming galaxies are observed to have ≈ 50 - 100 km/s line-of-sight velocity dispersions, which are much higher than expected from supernova driving alone. I will describe three-dimensional interstellar medium simulations that explore the impact of such high velocity dispersions, which arise from gravitational instabilities. The motions lead to strong global outflows, triggered by a thermal runaway caused by turbulent heating coupled with the inefficient cooling of > 105 K material. Our results suggests that in strongly, self-gravitating disks, outflows may be enhanced by, but need not be caused by, energy input from supernovae. |