144 citations · 532 across the 15 of their papers we have counts for
15 papers
Signatures of warm dark matter in the cosmological density fields extracted using Machine Learning
Ander Artola, Sarah E. I. Bosman, Prakash Gaikwad +6
We aim to construct a machine-learning approach that allows for a pixel-by-pixel reconstruction of the intergalactic medium (IGM) density field for various warm dark matter (WDM) m…
Damping Wing-Like Features in the Stacked Ly Forest: Potential Neutral Hydrogen Islands at
Yongda Zhu, George D. Becker, Sarah E. I. Bosman +28
Recent quasar absorption line observations suggest that reionization may end as late as . As a means to search for large neutral hydrogen islands at , we revisi…
Deep Learning the Intergalactic Medium using Lyman-alpha Forest at
Fahad Nasir, Prakash Gaikwad, Frederick B. Davies +3
Unveiling the thermal history of the intergalactic medium (IGM) at holds the potential to reveal early onset HeII reionization or lingering thermal fluctuations f…
Constraints on the Evolution of the Ionizing Background and Ionizing Photon Mean Free Path at the End of Reionization
Frederick B. Davies, Sarah E. I. Bosman, Prakash Gaikwad +16
The variations in Ly forest opacity observed at between lines of sight to different background quasars are too strong to be caused by fluctuations in the density field a…
The relationship between IGM Lyman-alpha opacity and galaxy density near the end of reionization
Holly M. Christenson, George D. Becker, Anson D'Aloisio +6
Observed scatter in the Lyman-alpha opacity of quasar sightlines at has motivated measurements of the correlation between Ly opacity and galaxy density, as models that pre…
Measuring the photo-ionization rate, neutral fraction and mean free path of HI ionizing photons at from a large sample of XShooter and ESI spectra
Prakash Gaikwad, Martin G. Haehnelt, Frederick B. Davies +16
We measure the mean free path (), photo-ionization rate () and neutral fraction () of hydrogen in 12 redshif…
Limits on non-canonical heating and turbulence in the intergalactic medium from the low redshift Lyman-alpha forest
James S. Bolton, Prakash Gaikwad, Martin G. Haehnelt +5
We examine the column density distribution function (CDDF) and Doppler parameter distribution from hydrodynamical simulations and Cosmic Origins Spectrograph (COS) observations of…
Hydrodynamic Response of the Intergalactic Medium to Reionization II: Physical Characteristics and Dynamics of Ionizing Photon Sinks
Fahad Nasir, Christopher Cain, Anson D'Aloisio +2
Becker et al. 2021 measured the mean free path of Lyman limit photons in the IGM at . The short value suggests that absorptions may have played a prominent role in reionizatio…
The evolution of the low-density HI intergalactic medium from z=3.6 to 0: Data, transmitted flux and HI column density
Tae-Sun Kim, Bart P. Wakker, Fahad Nasir +8
We present a new, uniform analysis of the HI transmitted flux (F) and HI column density (N(HI)) distribution in the low-density IGM as a function of redshift z for 0<z<3.6 using 55…
Constraining Reionization in Progress at z=5.7 with Lyman- Emitters: Voids, Peaks, and Cosmic Variance
Nakul Gangolli, Anson D'Aloisio, Fahad Nasir +1
A number of independent observations suggest that the intergalactic medium was significantly neutral at and that reionization was, perhaps, still in progress at . The…
Observing the tail of reionization: neutral islands in the Lyman- Forest
Fahad Nasir, Anson D'Aloisio
Previous studies have noted difficulties in modeling the highest opacities of the Ly forest, epitomized by the extreme Ly trough observed towards quasar ULAS J0148+06…
Revealing reionization with the thermal history of the intergalactic medium: new constraints from the Lyman- flux power spectrum
Elisa Boera, George D. Becker, James S. Bolton +1
We present a new investigation of the thermal history of the intergalactic medium (IGM) during and after reionization using the Lyman- forest flux power spectrum at $4.0\lesssim…
The effect of stellar and AGN feedback on the low redshift Lyman- forest in the Sherwood simulation suite
Fahad Nasir, James S. Bolton, Matteo Viel +4
We study the effect of different feedback prescriptions on the properties of the low redshift () Ly forest using a selection of hydrodynamical simulations drawn from t…
Diagnosing galactic feedback with the line broadening in the low redshift Lyman-alpha forest
M. Viel, M. G. Haehnelt, J. S. Bolton +4
We compare the low redshift (z ~ 0.1) Lyman-alpha forest from hydrodynamical simulations with data from the Cosmic Origin Spectrograph (COS). We find tension between the observed n…
Inferring the IGM thermal history during reionisation with the Lyman- forest power spectrum at redshift
Fahad Nasir, James S. Bolton, George D. Becker
We use cosmological hydrodynamical simulations to assess the feasibility of constraining the thermal history of the intergalactic medium during reionisation with the Ly forest a…