68 citations · 296 across the 28 of their papers we have counts for
24 papers · 1 filter
Constraints on Reionization from Planck Low- EE Polarization and the Lyman-Series Forests
Garett Lopez, Anson D'Aloisio, Christopher Cain
CMB measurements tightly constrain the Thomson scattering optical depth (), but they still permit a broad range of degenerate reionization histories. Incorporating Lyma…
The Atacama Cosmology Telescope: Constraints on the anisotropic screening and birefringence effects with DR6
Darby M. Kramer, Alexander van Engelen, Frank J. Qu +14
While we have learned much from recent surveys of the mm-wave sky, many secondary anisotropies of the CMB remain under-explored. We consider two of these here: the anisotropic scre…
Characterising the epoch of reionisation using the cross-correlation of the kSZ effect and CMB lensing
Niall MacCrann, Christopher Cain, Aleksandra Kusiak +5
We investigate the cross-correlation of the kinematic Sunyaev-Zeldovich (kSZ) effect with lensing of the cosmic microwave background (CMB) as a probe of the epoch of reionisation.…
Fireworks at Cosmic Dawn: relieving BAO-CMB tensions with the Pop III.1 Flash
Yash Aggarwal, Christopher Cain, Garett Lopez +4
A Cosmic Microwave Background (CMB) optical depth of , several in excess of the latest Planck low- EE polarization measurement, has been proposed as a way to…
A self-consistent analytical model for both the photoionization rate and reionization history
Christopher Cain, Kevin S. Croker, Anson D'Aloisio +4
Recent developments at the intersection of cosmology and astrophysics have highlighted the need for improved analytical models of observables that probe the Epoch of Reionization.…
An emulator for the ionizing photon mean free path in ultra-high resolution simulations: the implications of mean free path measurements for the reionization history
Hurum Maksora Tohfa, Christopher Cain, Matthew McQuinn +1
Measurements of the mean free path of ionizing photons from high-redshift quasar spectra at - constrain the reionization history, but interpreting them requires modeli…
Probing the ionizing photon output of galaxies near cosmic dawn with the patchy kSZ effect
Garett Lopez, Anson D'Aloisio, Christopher Cain
A key result from JWST's first cycles is that galaxy formation was well underway by . The implications of these early galaxies for reionization are less clear, however. The C…
The CMB optical depth constrains the duration of reionization
Christopher Cain, Alexander Van Engelen, Kevin S. Croker +3
Recently, it was pointed out that invoking a large value of the CMB optical depth, , could help resolve tensions between DESI DR2 BAO data and the CMB. This is…
Kiloparsec-scale turbulence driven by reionization may grow intergalactic magnetic fields
Christopher Cain, Matthew McQuinn, Evan Scannapieco +2
The intergalactic medium (IGM) underwent intense heating that resulted in pressure disequilibrium in the wake of ionization fronts during cosmic reionization. The dynamical relaxat…
Cross-correlating the patchy screening and kinetic Sunyaev-Zel'dovich effects as a new probe of reionization
Darby Kramer, Alexander van Engelen, Christopher Cain +5
The kinetic Sunyaev-Zel'dovich effect (kSZ) and patchy screening effect are two complementary cosmic microwave background (CMB) probes of the reionization era. The kSZ effect is a…
FlexRT -- A fast and flexible cosmological radiative transfer code for reionization studies I: Code validation
Christopher Cain, Anson D'Aloisio
The wealth of high-quality observational data from the epoch of reionization that will become available in the next decade motivates further development of modeling techniques for…
Chasing the beginning of reionization in the JWST era
Christopher Cain, Garett Lopez, Anson D'Aloisio +4
Recent JWST observations at may imply galactic ionizing photon production above prior expectations. Under observationally motivated assumptions about escape fractions, thes…
On the correlation between Ly forest opacity and galaxy density in late reionization models
Nakul Gangolli, Anson D'Aloisio, Christopher Cain +2
The relationship between Ly forest opacity and local galaxy density (the opacity-density relation) is a key observational test of late reionization models. Using narrow-band sur…
Quantifying Lyman- emissions from reionization fronts
Bayu Wilson, Anson D'Aloisio, Christopher Cain +2
During reionization, intergalactic ionization fronts (I-fronts) are sources of Ly line radiation produced by collisional excitation of hydrogen atoms within the fronts. In princ…
The hydrodynamic response of small-scale structure to reionization drives large IGM temperature fluctuations that persist to z = 4
Christopher Cain, Evan Scannapieco, Matthew McQuinn +2
The thermal history and structure of the intergalactic medium (IGM) at is an important boundary condition for reionization, and a key input for studies using the Ly f…
On the rise and fall of galactic ionizing output at the end of reionization
Christopher Cain, Anson D'Aloisio, Garett Lopez +2
Quasar absorption spectra measurements suggest that reionization proceeded rapidly, ended late at , and was followed by a flat ionizing background evolution. Simulation…
The effect of reionization on direct measurements of the mean free path
Joshua T. Roth, Anson D'Aloisio, Christopher Cain +3
Recent measurements of the ionizing photon mean free path (MFP) based on composite quasar spectra may point to reionization ending at . These measurements are challenging beca…
Probing Ultra-late Reionization: Direct Measurements of the Mean Free Path over
Yongda Zhu, George D. Becker, Holly M. Christenson +22
The mean free path of ionizing photons, , is a critical parameter for modeling the intergalactic medium (IGM) both during and after reionization. We present direct mea…
The Morphology of Reionization in a Dynamically Clumpy Universe
Christopher Cain, Anson D'Aloisio, Nakul Gangolli +1
A recent measurement of the Lyman-limit mean free path at suggests it may have been very short, motivating a better understanding of the role that ionizing photon sinks pla…
Small-scale clumping of dark matter and the mean free path of ionizing photons at
Christopher Cain, Anson D'Aloisio, Vid Irsic +2
Recently, the mean free path of ionizing photons in the intergalactic medium (IGM) was measured to be very short, presenting a challenge to existing reionization models. At…
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…
A short mean free path at favors late and rapid reionization by faint galaxies
Christopher Cain, Anson D'Aloisio, Nakul Gangolli +1
Recent measurements of the ionizing photon mean free path () at suggest that the IGM was rapidly evolving at those times. We use radiative transfer s…
A Model-Insensitive Baryon Acoustic Oscillation Feature in the 21 cm Signal from Reionization
Christopher Cain, Anson D'Aloisio, Vid Iršič +2
We examine the impact of baryon-dark matter relative velocities on intergalactic small-scale structure and the 21 cm signal during reionization. Streaming velocities reduced clumpi…
Hydrodynamic Response of the Intergalactic Medium to Reionization
Anson D'Aloisio, Matthew McQuinn, Hy Trac +2
The intergalactic medium is expected to clump on scales down to M before the onset of reionization. The impact of these small-scale structures on reionization…