Search Results for author: Frederick B. Davies

Found 3 papers, 1 papers with code

New Evidence for Extended HeII Reionization at z>3.5 from HeII Lyman Alpha and Beta Transmission Spikes

no code implementations14 Dec 2020 Kirill Makan, Gábor Worseck, Frederick B. Davies, Joseph F. Hennawi, J. Xavier Prochaska, Philipp Richter

We present new high-resolution (R~14, 000) spectra of the two brightest HeII-transparent quasars in the far-UV (FUV) at z>3. 5, HE2QSJ2311-1417 (z=3. 70) and HE2QSJ1630+0435 (z=3. 81), obtained with the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope (HST).

Cosmology and Nongalactic Astrophysics

Heating of the Intergalactic Medium by Hydrogen Reionization

1 code implementation24 Jul 2018 Anson D'Aloisio, Matthew McQuinn, Oliver Maupin, Frederick B. Davies, Hy Trac, Spencer Fuller, Phoebe R. Upton Sanderbeck

Here we use high-resolution radiative transfer simulations to study the parameter space of $T_\mathrm{reion}$.

Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies

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