1.7k citations · 3.3k across the 29 of their papers we have counts for
6 papers · 1 filter
Blue spectral inflation
Franz E. Schunck, Eckehard W. Mielke
We reconsider the nonlinear second order Abel equation of Stewart and Lyth, which follows from a nonlinear second order slow-roll approximation. We find a new eigenvalue spectrum i…
TOPICAL REVIEW: General relativistic boson stars
Franz E. Schunck, Eckehard W. Mielke
There is accumulating evidence that (fundamental) scalar fields may exist in Nature. The gravitational collapse of such a boson cloud would lead to a boson star (BS) as a new type…
Dark Matter Halos as Bose-Einstein Condensates
Eckehard W. Mielke, Burkhard Fuchs, Franz E. Schunck
Galactic dark matter is modelled by a scalar field in order to effectively modify Kepler's law without changing standard Newtonian gravity. In particular, a solvable toy model with…
Scalar field haloes as gravitational lenses
F. E. Schunck, B. Fuchs, E. W. Mielke
A non-topological soliton model with a repulsive scalar self-interaction of the Emden type provides a constant density core,similarly as the empirical Burkert profile of dark matte…
Scaling behaviour of a scalar field model of dark matter halos
B. Fuchs, E. W. Mielke
Galactic dark matter is modelled by a scalar field. In particular, it is shown that an analytically solvable toy model with a non-linear self-interaction potential U(Phi) leads to…
Eigenvalues of the Stewart-Lyth equation for inflation with a blue spectrum
Franz E. Schunck, Eckehard W. Mielke
By using the rather stringent nonlinear second order slow-roll approximation, we reconsider the nonlinear second order Abel equation of Stewart and Lyth. We determine a new blue ei…