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Cosmological constraints from 21cm surveys after reionization
Eli Visbal, Abraham Loeb, Stuart Wyithe
21cm emission from residual neutral hydrogen after the epoch of reionization can be used to trace the cosmological power spectrum of density fluctuations. Using a Fisher matrix for…
Fluctuations in the High-Redshift Lyman-Werner Background: Close Halo Pairs as the Origin of Supermassive Black Holes
Mark Dijkstra, Zoltan Haiman, Andrei Mesinger +1
The earliest generation of stars and black holes must have established an early 'Lyman-Werner' background (LWB) at high redshift, prior to the epoch of reionization. Because of the…
The escape fraction of ionizing photons from high redshift galaxies
Jhan Srbinovsky, Stuart Wyithe
The fraction of ionizing photons which escape their host galaxy and so are able to ionize hydrogen in the inter-galactic medium (IGM) is a critical parameter in studies of the reio…
Redshifted 21cm Observations of High Redshift Quasar Proximity Zones
Stuart Wyithe
The introduction of low-frequency radio arrays is expected to revolutionize the study of the reionization epoch. Observation of the contrast in redshifted 21cm emission between a l…
Possibility of Precise Measurement of the Cosmological Power Spectrum With a Dedicated 21cm Survey After Reionization
Abraham Loeb, Stuart Wyithe
Measurements of the 21cm line emission by residual cosmic hydrogen after reionization can be used to trace the power spectrum of density perturbations through a significant fractio…
Baryonic Acoustic Oscillations in 21cm Emission: A Probe of Dark Energy out to High Redshifts
Stuart Wyithe, Abraham Loeb, Paul Geil
Low-frequency observatories are currently being constructed with the goal of detecting redshifted 21cm emission from the epoch of reionization. These observatories will also be abl…