14 citations · 61 across the 13 of their papers we have counts for
13 papers
Unveiling the dark matter nature with reionization relics
Yao Zhang, Paulo Montero-Camacho, Catalina Morales-Gutiérrez +3
Dark matter constitutes roughly one-fourth of the Universe, yet its physical nature remains unknown. Warm dark matter (WDM), a class of dark matter candidates, has non-negligible v…
MeV cosmic-ray electrons modify the TeV pair-beam plasma instability
Mahmoud Alawashra, Yuanyuan Yang, Christopher M. Hirata +2
Relativistic pair beams created in the intergalactic medium (IGM) by TeV gamma rays from blazars are expected to produce a detectable GeV-scale electromagnetic cascade, but the cas…
Reionization relics in the cross-correlation between the Ly forest and 21 cm intensity mapping in the post-reionization era
Paulo Montero-Camacho, Catalina Morales-Gutiérrez, Yao Zhang +2
The tumultuous effects of ultraviolet photons that source cosmic reionization, the subsequent compression and shock-heating of low-density regions, and the modulation of baryons in…
Compton scattering of electrons in the intergalactic medium
Yuanyuan Yang, Heyang Long, Christopher M. Hirata
This paper investigates the distribution and implications of cosmic ray electrons within the intergalactic medium (IGM). Utilizing a synthesis model of the extragalactic background…
Simulating image coaddition with the Nancy Grace Roman Space Telescope: II. Analysis of the simulated images and implications for weak lensing
Masaya Yamamoto, Katherine Laliotis, Emily Macbeth +16
One challenge for applying current weak lensing analysis tools to the Nancy Grace Roman Space Telescope is that individual images will be undersampled. Our companion paper presente…
Simulating image coaddition with the Nancy Grace Roman Space Telescope: I. Simulation methodology and general results
Christopher M. Hirata, Masaya Yamamoto, Katherine Laliotis +16
The upcoming Nancy Grace Roman Space Telescope will carry out a wide-area survey in the near infrared. A key science objective is the measurement of cosmic structure via weak gravi…
Lyman- polarization from cosmological ionization fronts: II. Implications for intensity mapping
Emily Koivu, Heyang Long, Yuanyuan Yang +1
This is the second paper in a series whose aim is to predict the power spectrum of intensity and polarized intensity from cosmic reionization fronts. After building the analytic mo…
Lyman-α polarization from cosmological ionization fronts: I. Radiative transfer simulations
Yuanyuan Yang, Emily Koivu, Chenxiao Zeng +2
In this paper, we present the formalism of simulating Lyman- emission and polarization around reionization ( = 8) from a plane-parallel ionization front. We accomplish this b…
Impact of inhomogeneous reionization on post-reionization 21 cm intensity mapping measurement of cosmological parameters
Heyang Long, Catalina Morales-Gutiérrez, Paulo Montero-Camacho +1
21 cm intensity mapping (IM) has the potential to be a strong and unique probe of cosmology from redshift of order unity to redshift potentially as high as 30. For post-reionizatio…
Probing Large Scale Ionizing Background Fluctuation with Lyman Forest and Galaxy Cross-correlation at z=2.4
Heyang Long, Christopher M. Hirata
The amplitude of the metagalactic ultraviolet background (UVB) at large-scales is impacted by two factors. First, it naturally attenuates at scales larger than mean-free-path of UV…
A Synthetic Roman Space Telescope High-Latitude Time-Domain Survey: Supernovae in the Deep Field
Kevin X. Wang, Dan Scolnic, M. A. Troxel +14
NASA will launch the Nancy Grace Roman Space Telescope (Roman) in the second half of this decade, which will allow for a generation-defining measurement of dark energy through mult…
Weak Gravitational Lensing Shear Estimation with Metacalibration for the Roman High-Latitude Imaging Survey
Masaya Yamamoto, M. A. Troxel, Mike Jarvis +5
We investigate the performance of the Metacalibration shear calibration framework using simulated imaging data for the Nancy Grace Roman Space Telescope (Roman) reference High-Lati…
Streaming Velocity Effects on the Post-reionization 21 cm Baryon Acoustic Oscillation Signal
Heyang Long, Jahmour J. Givans, Christopher M. Hirata
The relative velocity between baryons and dark matter in the early Universe can suppress the formation of small-scale baryonic structure and leave an imprint on the baryon acoustic…