Speaker
Description
Feedback from galaxies plays a central role in regulating star formation and shaping the cosmic distribution of baryons. In particular, preventative feedback—which inhibits gas accretion onto the interstellar medium (ISM) rather than ejecting it after the fact—offers a compelling mechanism for reconciling observed galaxy growth with cosmological expectations.
Using the Arkenstone galactic wind model in cosmological simulations, we explore the impact of high specific energy winds on the circumgalactic and intergalactic media (CGM and IGM). Our results show that wind energy, not mass loading, most strongly regulates stellar mass buildup. Notably, increased mass loading at fixed energy leads to slightly enhanced star formation, as winds become less able to prevent future inflows.
These winds deposit energy and metals into the CGM and IGM, slowing gas infall and polluting gas out to large scales without requiring strong ejection from the ISM. The result is a heated, extended CGM that slows the inflow of gas towards the galaxy and reshapes the baryon content of halos. This preventative mode of feedback offers a promising path toward understanding how galaxies self-regulate, how the CGM mediates gas flows, and how baryons are partitioned across cosmic structures.
| Primary Theme | Small to large scales |
|---|---|
| Secondary Theme | Galactic to intergalactic scales |
| Presenter's Name | Jake Bennett |
| Presenter's Email Address | [email protected] |
| Recording Permission | YES |
| Virtual Audience Permission | YES |
| Photography Permission | YES |
| If your talk is not accepted for a contributed talk, would you be interested in presenting a fireslide/lightning talk? | No |
| If your fireslide/lighting talk is not accepted, would you be interested in presenting a poster? | No |
Author
Co-authors
External references
- 25070011
- 54d9a56b-f869-41e4-a03e-1278933dde55
