A5044413782- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Astro and Planetary Science
- Astrophysics and Cosmic Phenomena
- Sensor Technology and Measurement Systems
- Atmospheric aerosols and clouds
- Optical and Acousto-Optic Technologies
- Radiative Heat Transfer Studies
- Infrared Target Detection Methodologies
- Astronomy and Astrophysical Research
- Optical properties and cooling technologies in crystalline materials
- IoT-based Smart Home Systems
- Space Exploration and Technology
Northwestern University
2019-2023
Goddard Space Flight Center
1965
General Electric (United States)
1962
We use the FIRE-2 cosmological simulations to study formation of a quasi-static, virial-temperature gas phase in circumgalactic medium (CGM) at redshifts 0<z<5, and how this virialized affects evolution galactic discs. demonstrate that when halo mass crosses ~10^12 M_sun, cooling time shocked inner CGM (~0.1 R_vir, where R_vir is virial radius) exceeds local free-fall time. The then experiences transition from on average sub-virial temperatures (T<<T_vir), large pressure fluctuations...
Several recent simulations of galaxy formation predict two main phases supermassive black hole (BH) accretion: an early, highly intermittent phase (during which BHs are under-massive relative to local scaling relations), followed by a accelerated growth. We investigate physical factors that drive the transition in BH accretion cosmological zoom-in from FIRE project, ranging dwarf galaxies sufficiently massive host luminous quasars. The model multi-channel stellar feedback, but neglect AGN...
Abstract Feedback from supermassive black holes is believed to be a critical driver of the observed color bimodality galaxies above Milky Way mass scale. Active galactic nuclei (AGN) feedback has been modeled in many galaxy formation simulations, but most implementations have involved simplified prescriptions or coarse-grained interstellar medium (ISM). We present first set In Realistic Environments (FIRE)-3 cosmological zoom-in simulations with AGN evolved z ∼ 0, examining impact on halos...
Star formation is observed to be strongly correlated dense regions of molecular gas. Although the exact nature link between star and hydrogen still unclear, some have suggested that shielding gas by dust grains key factor enabling presence both. We present a sub-grid model for use in galaxy simulations which linked explicitly local shielding. developed tested our models using smoothed particle hydrodynamic solar sub-solar metallicity isolated Milky Way-mass disk galaxies. compared...
Abstract The properties of warm-hot gas around ∼ L * galaxies can be studied with absorption lines from highly ionized metals. We predict Ne viii column densities cosmological zoom-in simulations halos masses in ∼10 12 and 13 M ☉ the Feedback Realistic Environments (FIRE) project. traces volume-filling, virial-temperature halos. In is clumpier, biased toward cooler part phase. compare to observations COS Absorption Survey Baryon Harbors (or CASBaH) Ultraviolet CUBS). show that when inferring...