Astrophysics Seminars

The discovery of more than 400 extrasolar planets keeps challenging the theory of planet formation. Multi-planetary systems are of particular interest. Their orbital parameters allow us to constrain properties of the otherwise unobservable formation...

Quasars and radio galaxies display great morphological variety that correlates with other properties such as spectral slope and luminosity. The unification theory for radio-loud active galactic nuclei (AGNs) attempts to explain much of this...

Clusters of galaxies are unique and powerful probes of cosmology and astrophysics, promising to provide new insights into the nature of dark energy and dark matter to the physics of galaxy formation. The study of galaxy clusters combines the...

Dark matter halos that merge with larger halos persist as subhalos, which host satellite galaxies. While subhalos are rapidly stripped of their dark mass, the compact luminous material remains intact for some time. I use a high-resolution...

I will study generic single-field dark energy models, by a parametrization of the most general theory of their perturbations around a given background, including higher derivative terms. In appropriate limits this approach reproduces standard...