2.2k citations · 10.6k across the 172 of their papers we have counts for
16 papers · 1 filter
Cosmon Lumps and Horizonless Black Holes
Timm Krueger, Matthias Neubert, Christof Wetterich
We investigate non-linear, spherically symmetric solutions to the coupled system of a quintessence field and Einstein gravity. In the presence of a scalar potential, we find regula…
Growing Matter
Luca Amendola, Marco Baldi, Christof Wetterich
We investigate quintessence cosmologies with a matter component consisting of particles with an increasing mass. While negligible in early cosmology, the appearance of a growing ma…
Primordial nucleosynthesis as a probe of fundamental physics parameters
Thomas Dent, Steffen Stern, Christof Wetterich
We analyze the effect of variation of fundamental couplings and mass scales on primordial nucleosynthesis in a systematic way. The first step establishes the response of primordial…
Impact of three years of data from the Wilkinson Microwave Anisotropy Probe on cosmological models with dynamical dark energy
Michael Doran, Georg Robbers, Christof Wetterich
The first three years of observation of the Wilkinson Microwave Anisotropy Probe (WMAP) have provided the most precise data on the anisotropies of the cosmic microwave background (…
Observational constraints on the dark energy density evolution
Michael Doran, Khamphee Karwan, Christof Wetterich
We constrain the evolution of the dark energy density from Cosmic Microwave Background, Large Scale Structure and Supernovae Ia measurements. While Supernovae Ia are most sensitive…
Non-linear Structure Formation in Cosmologies with Early Dark Energy
Matthias Bartelmann, Michael Doran, Christof Wetterich
We argue that a few per cent of "Early Dark Energy" can be detected by the statistics of nonlinear structures. The presence of Dark Energy during linear structure formation is natu…
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…
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…
Quintessence and the cosmological constant
Michael Doran, Christof Wetterich
Quintessence -- the energy density of a slowly evolving scalar field -- may constitute a dynamical form of the homogeneous dark energy in the universe. We review the basic idea in…
Can Structure Formation Influence the Cosmological Evolution?
C. Wetterich
The backreaction of structure formation influences the cosmological evolution equation for the homogenous and isotropic average metric. In a cold dark matter universe this effect l…
Are Galaxies Cosmon Lumps?
C. Wetterich
The scalar ``cosmon'' field mediating quintessence influences the dynamics of extended objects in the universe. We discuss cosmon lumps -- spherically symmetric solutions for the s…
Structure Formation and the Time Dependence of Quintessence
Michael Doran, Jan-Markus Schwindt, Christof Wetterich
We discuss the influence of dark energy on structure formation, especially the effects on σ_8. Our interest is particularly focused on quintessence models with time-dependent equat…
The Influence of Quintessence on the Separation of CMB Peaks
Michael Doran, Matthew Lilley, Jan Schwindt +1
A hypothetical dark energy component may have an equation of state that is different from a cosmological constant and possibly even changing in time. The spacing of the cosmic micr…
Constraining Quintessence with the New CMB Data
Michael Doran, Matthew Lilley, Christof Wetterich
The CMB data recently released by BOOMERANG and MAXIMA suggest that the anisotropy spectrum has a third peak in the range 800<l_3<900. A combination of this result with constraints…
Quintessence and the Separation of CMB Peaks
Michael Doran, Matthew Lilley, Jan Schwindt +1
We propose that it should be possible to use the CMB to discriminate between dark energy models with different equations of state, including distinguishing a cosmological constant…