260 citations · 1.3k across the 24 of their papers we have counts for
12 papers · 1 filter
Reionisation time fields reconstruction from 21 cm signal maps
Julien Hiegel, Emilie Thélie, Dominique Aubert +6
During the Epoch of reionisation, the intergalactic medium is reionised by the UV radiation from the first generation of stars and galaxies. One tracer of the process is the 21 cm…
Topology of Reionisation times: concepts, measurements and comparisons to gaussian random field predictions
Emilie Thélie, Dominique Aubert, Nicolas Gillet +2
In the next decade, radio telescopes like the Square Kilometer Array (SKA) will explore the Universe at high redshift, and particularly during the Epoch of Reionisation (EoR). The…
A first look at the topology of reionization redshifts in models of the Epoch of the Reionization
Emilie Thélie, Dominique Aubert, Nicolas Gillet +1
During the EoR, the first stars and galaxies appear while creating ionized bubbles that will eventually percolate near z=6. These ionized bubbles and percolation process are nowada…
Machine learning astrophysics from 21 cm lightcones: impact of network architectures and signal contamination
David Prelogović, Andrei Mesinger, Steven Murray +2
Imaging the cosmic 21 cm signal will map out the first billion years of our Universe. The resulting 3D lightcone (LC) will encode the properties of the unseen first galaxies and ph…
Lyman-alpha opacities at z=4-6 require low mass, radiatively-suppressed galaxies to drive cosmic reionization
Pierre Ocvirk, Joseph S. W. Lewis, Nicolas Gillet +4
The high redshift Lyman-alpha forest, in particular the Gunn-Peterson trough, is the most unambiguous signature of the neutral to ionized transition of the intergalactic medium (IG…
Constraints on warm dark matter from UV luminosity functions of high-z galaxies with Bayesian model comparison
Anton Rudakovskyi, Andrei Mesinger, Denys Savchenko +1
The number density of small dark matter (DM) halos hosting faint high-redshift galaxies is sensitive to the DM free-streaming properties. However, constraining these DM properties…
21cm signal predictions at Cosmic Dawn and Reionization with coupled radiative-hydrodynamics
Nicolas J. F. Gillet, Dominique Aubert, Florent G. Mertens +1
The process of heating and reionization of the Universe at high redshift links small scale structures/galaxy formation and large scale inter-galactic medium properties. Even if the…
Minimum size of 21-cm simulations
Harman Deep Kaur, Nicolas Gillet, Andrei Mesinger
Cosmic 21cm interferometry is set to revolutionize our understanding of the Epoch of Reionization (EoR) and the Cosmic Dawn (CD). However, the signal has structure on a huge range…
Properties of reionization-era galaxies from JWST luminosity functions and 21-cm interferometry
Jaehong Park, Nicolas Gillet, Andrei Mesinger +1
Next generation observatories will enable us to study the first billion years of our Universe in unprecedented detail. Foremost among these are 21-cm interferometry with the HERA a…
A deep learning model to emulate simulations of cosmic reionization
Jonathan Chardin, Grégoire Uhlrich, Dominique Aubert +4
We present a deep learning model trained to emulate the radiative transfer during the epoch of cosmological reionization. CRADLE (Cosmological Reionization And Deep LEarning) is an…
Suppression of Star Formation in Low-Mass Galaxies Caused by the Reionization of their Local Neighborhood
Taha Dawoodbhoy, Paul R. Shapiro, Pierre Ocvirk +10
Photoheating associated with reionization suppressed star formation in low-mass galaxies. Reionization was inhomogeneous, however, affecting different regions at different times. T…
Deep learning from 21-cm tomography of the Cosmic Dawn and Reionization
Nicolas Gillet, Andrei Mesinger, Bradley Greig +2
The 21-cm power spectrum (PS) has been shown to be a powerful discriminant of reionization and cosmic dawn astrophysical parameters. However, the 21-cm tomographic signal is highly…