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Scaling Laws of Passive-Scalar Diffusion in the Interstellar Medium
Matthew J. Colbrook, Xiangcheng Ma, Philip F. Hopkins +1
Passive scalar mixing (metals, molecules, etc.) in the turbulent interstellar medium (ISM) is critical for abundance patterns of stars and clusters, galaxy and star formation, and…
Why do high-redshift galaxies show diverse gas-phase metallicity gradients?
Xiangcheng Ma, Philip F. Hopkins, Robert Feldmann +3
Recent spatially resolved observations of galaxies at z=0.6-3 reveal that high-redshift galaxies show complex kinematics and a broad distribution of gas-phase metallicity gradients…
The Structure and Dynamical Evolution of the Stellar Disk of a Simulated Milky Way-Mass Galaxy
Xiangcheng Ma, Philip F. Hopkins, Andrew R. Wetzel +5
We study the structure, age and metallicity gradients, and dynamical evolution using a cosmological zoom-in simulation of a Milky Way-mass galaxy from the Feedback in Realistic Env…
Feedback first: the surprisingly weak effects of magnetic fields, viscosity, conduction, and metal diffusion on galaxy formation
Kung-Yi Su, Philip F. Hopkins, Christopher C. Hayward +4
Using high-resolution simulations with explicit treatment of stellar feedback physics based on the FIRE (Feedback in Realistic Environments) project, we study how galaxy formation…
Metal flows of the circumgalactic medium, and the metal budget in galactic halos
Alexander L. Muratov, Dusan Keres, Claude-Andre Faucher-Giguere +8
We present an analysis of the flow of metals through the circumgalactic medium (CGM) in the Feedback in Realistic Environments (FIRE) simulations of galaxy formation, ranging from…
Binary Stars Can Provide the "Missing Photons" Needed for Reionization
Xiangcheng Ma, Philip F. Hopkins, Daniel Kasen +4
Empirical constraints on reionization require galactic ionizing photon escape fractions fesc>20%, but recent high-resolution radiation-hydrodynamic calculations have consistently f…