4 papers
CMB Constraints on Pre-Inflationary Axion Dark Matter Isocurvature
Catherine Petretti, Praniti Singh, Matteo Braglia +3
Although measurements of the Cosmic Microwave Background (CMB) are consistent with a nearly scale-invariant primordial spectrum of adiabatic perturbations, in which the energy dens…
Pulse and Polarization Structures in Axion-Converted X-rays from Pulsars
JiJi Fan, Lingfeng Li, Chen Sun
Neutron stars (NS's) with their strong magnetic fields and hot dense cores could be powerful probes of axions, a classic benchmark of feebly-coupled new particles, through abundant…
Cosmic ensions Indirectly Correlate with Reionization Optical Depth
Itamar J. Allali, Lingfeng Li, Praniti Singh +1
The reionization optical depth has interesting connections to existing cosmological anomalies. As first studied in the context of the Hubble tension in our previous…
Reionization and the Hubble Constant: Correlations in the Cosmic Microwave Background
Itamar J. Allali, Praniti Singh, JiJi Fan +1
Recently, the James Webb Space Telescope (JWST) has found early galaxies producing photons from more efficient ionization than previously assumed. This may suggest a reionization p…