Date: Wednesday 08-Feb-2023
Time: 11:30-12:30 pm
Location: PSC 1136
Speaker: Chia-Yu Hu (University of Florida)
Title: "Co-evolution of dust and chemistry in simulated dwarf galaxies with a resolved interstellar medium"
The cycle of gas in and around galaxies plays a fundamental role in galaxy formation. Current hydrodynamical simulations have managed to reach parsec-scale resolutions to follow the small-scale physics of interstellar medium (ISM). As our knowledge of the gas cycle comes from multi-wavelength observations, detailed modeling of the ISM chemistry is necessary in order to predict observables. However, interstellar dust, the major catalyst of ISM chemistry, is often regarded as a non-evolving species. In this talk, I will present recent progress on resolved hydrodynamical simulations of low-metallicity dwarf galaxies coupled with chemistry and dust evolution. I will show that the observed CO(1-0) luminosity can only be reproduced if dust growth in the ISM is included as otherwise CO would be completely photo-dissociated. Sputtering from supernova explosions is not efficient enough to destroy all the newly-created dust in dense gas, which leads to galactic outflows 20 - 50% dustier than the ISM traveling to large distances, providing a possible source of the intergalactic dust.
Guidelines and format for the CTC Lunch seminars.
Past CTC Lunch seminars.
For other questions, contact the CTC Lunch host: Shmuel Bialy
SPECIAL ACCOMMODATIONS:
Special accommodations for individuals with disabilities can be made by calling (301) 405-3001. It would be appreciated if we are notified at least one week in advance.
