Measurement of Hot Gas Mass Outflow Rates from Starburst Galaxies
Abstract
Starburst driven winds provide metal rich gas to the galactic halo. While absorption spectra from neutral or low ionized gas can measure the velocity and mass outflow rate of cold and warm gas in the wind, it does not accurately reflect the velocity of the hot gas. Using synthetic absorption lines generated from 3D hydrodynamical simulations we have previously showed that the velocity of the cold and warm gas in a galactic wind depends on the star formation rate (SFR), while the velocity of the hot gas is independent of the SFR. We present results from further simulations where we measure the mass outflow rate of the hot gas and show how it correlates with the mass loading from the nuclear starburst. Our simulations show how the mass outflow rate of the hot gas is further increased by evaporation from cold gas entrained in the wind. We measure this evaporation and determine that it contributes significantly to the hot gas mass outflow rate.
- Publication:
-
American Astronomical Society Meeting Abstracts #233
- Pub Date:
- January 2019
- Bibcode:
- 2019AAS...23336803T