61 citations · 239 across the 13 of their papers we have counts for
13 papers
Rapid and accurate numerical evolution of linear cosmological perturbations with non-cold relics
Nanoom Lee, José Luis Bernal, Sven Günther +2
We describe the implementation of a new approach to the numerical evaluation of the effects of non-cold relics on the evolution of cosmological perturbations. The Boltzmann hierarc…
Linear polarization of the stochastic gravitational-wave background with pulsar timing arrays
Neha Anil Kumar, Mesut Çalışkan, Gabriela Sato-Polito +2
Pulsar-timing collaborations have recently reported evidence for the detection of an isotropic stochastic gravitational-wave background consistent with one sourced by a population…
Probing wave-optics effects and low-mass dark matter halos with lensing of gravitational waves from massive black holes
Mesut Çalışkan, Neha Anil Kumar, Lingyuan Ji +4
The Laser Interferometer Space Antenna (LISA) will detect gravitational waves (GWs) emitted by massive black hole binaries (MBHBs) in the low-frequency (mHz) band. Low-mass l…
Observability of lensing of gravitational waves from massive black hole binaries with LISA
Mesut Çalışkan, Lingyuan Ji, Roberto Cotesta +3
The gravitational waves emitted by massive black hole binaries in the LISA band can be lensed. Wave-optics effects in the lensed signal are crucial when the Schwarzschild radius of…
Cosmological perturbations: non-cold relics without the Boltzmann hierarchy
Lingyuan Ji, Marc Kamionkowski, Jose Luis Bernal
We present a formulation of cosmological perturbation theory where the Boltzmann hierarchies that evolve the neutrino phase-space distributions are replaced by integrals that can b…
Cross-correlation of the Polarizations of the 21-cm and Cosmic Microwave Backgrounds
Lingyuan Ji, Selim C. Hotinli, Marc Kamionkowski
The polarization of the 21-cm radiation from the epoch of reionization arises from Thomson scattering of 21-cm photons from free electrons and provides information that complements…
What causes the absence of pulsations in Central Compact Objects in Supernova Remnants?
Qi Wu, Adriana M. Pires, Axel Schwope +3
Most young neutron stars belonging to the class of Central Compact Objects in supernova remnants (CCOs) do not have known periodicities. We investigated seven such CCOs to understa…
Thermal Perturbations from Cosmological Constant Relaxation
Lingyuan Ji, David E. Kaplan, Surjeet Rajendran +1
We probe the cosmological consequences of a recently proposed class of solutions to the cosmological constant problem. In these models, the universe undergoes a long period of infl…
Wave Dark Matter Non-minimally Coupled to Gravity
Lingyuan Ji
We consider a model where a light scalar field (with mass ), conjectured to be dark matter, has a non-minimal coupling to gravity. In the non-relativistic l…
Standard Model Prediction for Cosmological 21cm Circular Polarization
Lingyuan Ji, Marc Kamionkowski, Keisuke Inomata
Before cosmic reionization, hydrogen atoms acquire a spin polarization quadrupole through interaction with the anisotropic 21-cm radiation field. The interaction of this quadrupole…
Reheating constraints to WIMPflation
Lingyuan Ji, Marc Kamionkowski
Analyses of inflation models are usually conducted assuming a specific range---e.g., --of the number of -folds of inflation. However, the analysis can al…
Direct millicharged dark matter cannot explain EDGES
Cyril Creque-Sarbinowski, Lingyuan Ji, Ely D. Kovetz +1
Heat transfer between baryons and millicharged dark matter has been invoked as a possible explanation for the anomalous 21-cm absorption signal seen by EDGES. Prior work has shown…
Strong Lensing of Gamma Ray Bursts as a Probe of Compact Dark Matter
Lingyuan Ji, Ely D. Kovetz, Marc Kamionkowski
Compact dark matter has been efficiently constrained in the M <~ 10 M_sun mass range by null searches for microlensing of stars in nearby galaxies. Here we propose to probe the mas…