95 citations · 248 across the 5 of their papers we have counts for
5 papers
Gravimagnetic effect of the barycentric motion of the Sun and determination of the post-Newtonian parameter gamma in the Cassini experiment
S. M. Kopeikin, A. G. Polnarev, G. Schaefer +1
The most precise test of the post-Newtonian gamma parameter in the solar system has been achieved in measurement of the frequency shift of radio waves to and from the Cassini space…
Nucleosynthesis and the variation of fundamental couplings
Christian M. Mueller, Gregor Schaefer, Christof Wetterich
We determine the influence of a variation of the fundamental ``constants'' on the predicted helium abundance in Big Bang Nucleosynthesis. The analytic estimate is performed in two…
Isocurvature Perturbations in Quintessence Cosmologies
Gregor Schaefer
We present a systematic treatment of the initial conditions and evolution of cosmological perturbations in a universe containing photons, baryons, neutrinos, cold dark matter, and…
Gauge-Invariant Initial Conditions and Early Time Perturbations in Quintessence Universes
Michael Doran, Christian M. Mueller, Gregor Schaefer +1
We present a systematic treatment of the initial conditions and evolution of cosmological perturbations in a universe containing photons, baryons, neutrinos, cold dark matter, and…
Early Quintessence in Light of WMAP
Robert R. Caldwell, Michael Doran, Christian M. Mueller +2
We examine the cosmic microwave background (CMB) anisotropy for signatures of early quintessence dark energy -- a non-negligible quintessence energy density during the recombinatio…