Baryon Cycling in Cosmological Simulations of Spiral Galaxies
Abstract
The cycling of gas through galactic fountains links disks to halos; simulations enable astronomers to follow this cycling by tracking gas particles. Most previous computational analysis, however, has focused either on low-resolution simulations of many galaxies or on a single high-resolution galaxy. In order to follow gas ejection and reaccretion in galaxies with spatially-resolved disks, we analyzed sixteen spiral and dwarf galaxies from zoom-in cosmological runs integrated to a redshift of zero. These simulations include advanced ISM modeling and metal-line cooling and have appropriate redshift-zero stellar masses, bulge-to-total masses and metallicities. We used them to analyze spatially-resolved gas loss and accretion as a function of halo mass and redshift. We demonstrate the redistribution of baryons throughout the disk and quantify how gas cycling and re-enrichment increases with halo mass.
- Publication:
-
American Astronomical Society Meeting Abstracts #223
- Pub Date:
- January 2014
- Bibcode:
- 2014AAS...22324647C