Zobrazeno 1 - 10
of 611
pro vyhledávání: '"Hu, Wayne"'
We consider the effects of relaxing the assumption that gravitational waves composing the stochastic gravitational wave background (SGWB) are uncorrelated between frequencies in analyses of the data from Pulsar Timing Arrays (PTAs). While individual
Externí odkaz:
http://arxiv.org/abs/2408.11774
Wave or fuzzy dark matter that is produced with relativistic wavenumbers exhibits free streaming effects analogous to warm or hot particle dark matter with relativistic momenta. Axions produced after inflation provide such a warm or mildly relativist
Externí odkaz:
http://arxiv.org/abs/2406.12970
Publikováno v:
Phys. Rev. D 109, 063507 (2024)
Isocurvature fluctuations, where the relative number density of particle species spatially varies, can be generated from initially adiabatic, or curvature, fluctuations if the various species fall out of or were never in thermal equilibrium. The free
Externí odkaz:
http://arxiv.org/abs/2311.17164
Publikováno v:
Phys. Rev. D 108 (2023), 103520
Strongly lensed gravitational waves (GWs) from binary coalescence manifest as repeated chirps from the original merger. At the detectors, the phase of the lensed GWs and its arrival time differences will be consistent modulo a fixed constant phase sh
Externí odkaz:
http://arxiv.org/abs/2308.06616
The thermal Sunyaev-Zel'dovich (tSZ) effect is a spectral distortion of the cosmic microwave background (CMB) resulting from inverse Compton scattering of CMB photons with electrons in the medium of galaxy clusters. The spectrum of the tSZ effect is
Externí odkaz:
http://arxiv.org/abs/2305.09882
We study the $N$-point function of the density contrast to quadratic order in the squeezed limit during the matter-dominated (MD) and radiation-dominated (RD) eras in synchronous gauge. Since synchronous gauge follows the free-fall frame of observers
Externí odkaz:
http://arxiv.org/abs/2304.10559
Early dark energy (EDE), whose cosmological role is localized in time around the epoch of matter-radiation equality in order to resolve the Hubble tension, introduces a new coincidence problem: why should the EDE dynamics occur near equality if EDE i
Externí odkaz:
http://arxiv.org/abs/2212.08098
Publikováno v:
Phys. Rev. D 107, 083532 (2023)
We explore a re-parameterization of the lensing amplitude tension between weak lensing (WL) and cosmic microwave background (CMB) data and its implications for a joint resolution with the Hubble tension. Specifically, we focus on the lensing amplitud
Externí odkaz:
http://arxiv.org/abs/2209.12997
Publikováno v:
Journal of Cosmology and Astroparticle Physics, Volume 2022, Issue 08, id.016, 33 pp
Low-energy alternatives to General Relativity (GR) generically modify the phase of gravitational waves (GWs) during their propagation. As detector sensitivities increase, it becomes key to understand how these modifications affect the GW higher modes
Externí odkaz:
http://arxiv.org/abs/2203.13252
Autor:
Passaglia, Samuel, Hu, Wayne
Publikováno v:
Phys. Rev. D 105 (2022), 123529
Ultralight axions are theoretically interesting and phenomenologically rich dark sector candidates, but they are difficult to track across cosmological timescales because of their fast oscillations. We resolve this problem by developing a novel metho
Externí odkaz:
http://arxiv.org/abs/2201.10238