347 citations · 3k across the 46 of their papers we have counts for
47 papers
Less isn't more: Cosmological bounds on the neutrino masses are robust to changes in the neutrino abundance
Sebastian J. Figueroa, Alexander C. Sobotka, Adrienne L. Erickcek
We investigate how neutrino-mass constraints from cosmology depend on the assumed thermal history of the universe. Photon injection after neutrino decoupling would decrease the neu…
21-cm Constraints on Dark Matter Annihilation after an Early Matter-Dominated Era
Hwan Bae, Adrienne L. Erickcek, M. Sten Delos +1
Although it is commonly assumed that relativistic particles dominate the energy density of the universe quickly after inflation, a variety of well-motivated scenarios predict an ea…
Conversations and Deliberations: Non-Standard Cosmological Epochs and Expansion Histories
Brian Batell, Keith R. Dienes, Brooks Thomas +17
This document summarizes the discussions which took place during the PITT-PACC Workshop entitled "Non-Standard Cosmological Epochs and Expansion Histories," held in Pittsburgh, Pen…
Signatures of Very Early Dark Energy in the Matter Power Spectrum
Alexander C. Sobotka, Adrienne L. Erickcek, Tristan L. Smith
Axion-like scalar fields can induce temporary deviations from the standard expansion history of the universe. The scalar field's contribution to the energy density of the universe…
Comprehensive Constraints on Dark Radiation Injection After BBN
Alexander C. Sobotka, Adrienne L. Erickcek, Tristan L. Smith
We derive constraints on the injection of free-streaming dark radiation after big bang nucleosynthesis (BBN) by considering the decay of a massive hidden sector particle into dark…
How an era of kination impacts substructure and the dark matter annihilation rate
M. Sten Delos, Kayla Redmond, Adrienne L. Erickcek
An era of kination occurs when the Universe's energy density is dominated by a fast-rolling scalar field. Dark matter that is thermally produced during an era of kination requires…