5 papers
Fast radio burst dispersion is an unbiased tracer of matter on large scales
Shion Andrew, Haochen Wang, Kiyoshi Masui +6
The dispersion of fast radio bursts (FRBs) measures the column density of free electrons, tracing the diffuse ionized gas that contains more than of all baryons. On linear s…
Kinetic Mixing and the Phantom Illusion: Axion-Dilaton Quintessence in Light of DESI DR2
Michael W. Toomey, Ellie Hughes, Mikhail M. Ivanov +1
Recent results from DESI BAO analyses suggest that dark energy may not be a cosmological constant and is in fact dynamical. Furthermore, the data suggest that the equation of state…
High-redshift Millennium and Astrid galaxies in effective field theory at the field level
James M. Sullivan, Carolina Cuesta-Lazaro, Mikhail M. Ivanov +6
Effective Field Theory (EFT) modeling is expected to be a useful tool in the era of future higher-redshift galaxy surveys such as DESI-II and Spec-S5 due to its robust description…
Can supermassive stars form in protogalaxies due to internal Lyman-Werner feedback?
James Sullivan, Zoltan Haiman, Mihir Kulkarni +1
Population III stars are possible precursors to early massive and supermassive black holes (BHs). The presence of soft UV Lyman Werner (LW) background radiation can suppress Popula…
Emulating Recombination with Neural Networks using Universal Differential Equations
Ben Pennell, Zack Li, James M. Sullivan
With an aim towards modeling cosmologies beyond the CDM paradigm, we demonstrate the automatic construction of recombination history emulators while enforcing a prior of causal…