97 citations · 350 across the 10 of their papers we have counts for
10 papers
OCEANS of Absorption: High-resolution NIRSpec Spectroscopy Reveals Diverse Balmer-line Absorption in Little Red Dots
Kelcey Davis, Madisyn Brooks, Raymond C. Simons +24
The ``Little Red Dots' (LRDs) that appeared in JWST deep field images have been the subject of significant study since their discovery. In this work, we present high-resolution fol…
Extreme Emission Line Galaxies in CEERS Are Powered by Star Formation, not AGN
Kelcey Davis, Madisyn Brooks, Jonathan R. Trump +28
We present a spectroscopic study of photometrically identified extreme emission-line galaxies (EELGs) with observed-frame equivalent widths (EWs) >5000 A of either H alpha or H bet…
Population III star formation near high-redshift active galactic nuclei
Ethan M. Fisk, Madeline A. Marshall, Phoebe R. Upton Sanderbeck +1
Using cosmological radiation-hydrodynamical simulations, we study the effect of accreting supermassive black holes (SMBHs) on nearby dark-matter (DM) haloes in the very early unive…
An Estimate of the Impact of Reionization on Supermassive Black Hole Growth
Phoebe R. Upton Sanderbeck, Jarrett L. Johnson, Madeline A. Marshall
The supermassive black holes (SMBHs) that power active galactic nuclei found at were formed during the epoch of reionization. Because reionization is an inhomogeneous proce…
A Simple Condition for Sustained Super-Eddington Black Hole Growth
Jarrett Lawrence Johnson, Phoebe R. Upton Sanderbeck
One of the most pressing questions in cosmology is how the black holes (BHs) powering quasars at high redshift grow to supermassive scales within a billion years of the Big Bang. H…
Inhomogeneous HeII reionization in Hydrodynamic Simulations
Phoebe Upton Sanderbeck, Simeon Bird
The reionization of the second electron of helium shapes the physical state of intergalactic gas at redshifts between 2 < z < 5. Because performing full in situ radiative transfer…
The Sources of Extreme Ultraviolet and Soft X-ray Backgrounds
Phoebe R. Upton Sanderbeck, Matthew McQuinn, Anson D'Aloisio +1
Radiation in the extreme ultraviolet (EUV) and soft X-ray holds clues to the location of the missing baryons, the energetics in stellar feedback processes, and the cosmic enrichmen…
On the Contribution of Active Galactic Nuclei to the High-Redshift Metagalactic Ionizing Background
Anson D'Aloisio, Phoebe R. Upton Sanderbeck, Matthew McQuinn +2
Motivated by the claimed detection of a large population of faint active galactic nuclei (AGN) at high redshift, recent studies have proposed models in which AGN contribute signifi…
Models of the Thermal Evolution of the Intergalactic Medium After Reionization
Phoebe R. Upton Sanderbeck, Anson D'Aloisio, Matthew J. McQuinn
Recent years have brought more precise temperature measurements of the low-density intergalactic medium (IGM). These new measurements constrain the processes that heated the IGM, s…
On the intergalactic temperature-density relation
Matthew McQuinn, Phoebe R. Upton Sanderbeck
Cosmological simulations of the low-density intergalactic medium exhibit a strikingly tight power-law relation between temperature and density that holds over two decades in densit…