8 papers · 1 filter
A Tentative Detection of Molecular Hydrogen (H) Emission Lines at Cosmic Dawn
Madisen Johnson, Blakesley Burkhart, Francesco D'Eugenio +11
We present a theoretical framework for interpreting far-ultraviolet (FUV) fluorescent emission from molecular hydrogen (H) in high-redshift galaxies, motivated by the unique ca…
Diverse dark matter profiles in FIRE dwarfs: black holes, cosmic rays and the cusp-core enigma
Sophie Koudmani, Douglas Rennehan, Rachel S. Somerville +5
Dwarf galaxies have historically posed challenges to the cold dark matter (CDM) model and, while many of the so-called 'dwarf galaxy problems' have been mitigated by incorporating…
A data-driven approach for star formation parameterization using symbolic regression
Diane M. Salim, Matthew E. Orr, Blakesley Burkhart +2
Star formation (SF) in the interstellar medium (ISM) is fundamental to understanding galaxy evolution and planet formation. However, efforts to develop closed-form analytic express…
How the Cookie Crumbles: A Model for Star-forming Clumps in High-redshift Disk Galaxies
Matthew E. Orr, Douglas Rennehan
We present a simple model for the number distribution of maximally star-forming clumps in rotating disk galaxies, at high- with high gas surface densities. By combining assumpti…
Inside-out versus Upside-down: The Origin and Evolution of Metallicity Radial Gradients in FIRE Simulations of Milky Way-mass Galaxies and the Essential Role of Gas Mixing
Russell L. Graf, Andrew Wetzel, Jeremy Bailin +1
Within the Milky Way (MW), younger stellar populations exhibit steeper (more negative) metallicity radial gradients; the origin of this trend remains debated. The FIRE-2 cosmologic…
Objects May Be Closer Than They Appear: Significant Host Galaxy Dispersion Measures of Fast Radio Bursts in Zoom-in Simulations
Matthew E. Orr, Blakesley Burkhart, Wenbin Lu +2
We investigate the contribution of host galaxies to the overall Dispersion Measures (DMs) for Fast Radio Bursts (FRBs) using the Feedback in Realistic Environments (FIRE-2) cosmolo…