187 citations · 712 across the 18 of their papers we have counts for
5 papers · 1 filter
High-Redshift Galaxies with Large Ionization Parameters
Mark L. A. Richardson, Emily M. Levesque, Emily M. McLinden +3
Motivated by recent observations of galaxies dominated by emission lines, which show evidence of being metal poor with young stellar populations, we present calculations of multipl…
[NeIII]/[OII] as an Ionization Parameter Diagnostic in Star-Forming Galaxies
Emily M. Levesque, Mark L. A. Richardson
We present our parameterizations of the log([NeIII]3869/[OII]3727) (Ne3O2) and log([OIII]5007/[OII]3727) ratios as comparable and effective diagnostics of ionization parameter in s…
Formation of Compact Clusters from High Resolution Hybrid Cosmological Simulations
Mark L. A. Richardson, Evan Scannapieco, William J. Gray
The early Universe hosted a large population of small dark matter `minihalos' that were too small to cool and form stars on their own. These existed as static objects around larger…
Hybrid Cosmological Simulations with Stream Velocities
Mark L. A. Richardson, Evan Scannapieco, Robert J. Thacker
In the early universe, substantial relative "stream" velocities between the gas and dark matter arise due to radiation pressure and persist after recombination. To asses the impact…
The Dynamical Masses, Densities, and Star Formation Scaling Relations of Lyman Alpha Galaxies
James E. Rhoads, Sangeeta Malhotra, Steven L. Finkelstein +4
We present the first dynamical mass measurements for Lyman alpha galaxies at high redshift, based on velocity dispersion measurements from rest-frame optical emission lines and siz…