4 citations · 5 across the 4 of their papers we have counts for
12 papers
The effect of long range gravitational perturbations on the first acoustic peak of the cosmic microwave background
Richard Lieu
In the standard cosmological model, the temperature anisotropy of the cosmic microwave background is interpreted as variation in the gravitational potential at the point of emissio…
Proving the conservation of surface brightness during the strong and weak lensing of light by an isothermal sphere
Richard Lieu
An analytical proof of the conservation of surface brightness during the strong and weak lensing of light by a singular isothermal sphere is provided. It is shown that the movement…
The convergence fluctuation of light by clusters of galaxies - a cosmological test using the second acoustic peak of the microwave background
Richard Lieu, Jonathan P. D. Mittaz
The magnification of distant sources by mass clumps at lower () redshifts is calculated analytically. The clumps are initially assumed to be galaxy group isothermal spher…
Stringent limits on the existence of Planck time from stellar interferometry
Richard Lieu, Lloyd W. Hillman
We present a method of directly testing whether time is `grainy' on scales of <= t_P = (hbar G/c^5)^0.5 ~ 5.4E-44 s, the Planck time. If the phenomenon exists, the energy and momen…
A Comparison of the EUV and X-Ray Emission Profiles in Six Clusters of Galaxies
F. Durret, S. Dos Santos, R. Lieu
We have performed the wavelet analysis and image reconstructions for six clusters of galaxies observed both at extreme ultraviolet and X-ray energies. The comparison of the profile…
EUV and X-ray observations of Abell 2199: a three-phase intracluster medium with a massive warm component
Richard Lieu, Max Bonamente, Jonathan P. D. Mittaz
Various independent ways of constraining key cosmological parameters yielded a consensus range of values which indicates that at the present epoch the bulk of the universe's baryon…