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## Work## Research interests## Gravitation- Problem of motion / motion of extended bodies
- Multipolar approximation schemes
- Post-Newtonian / post-Minkowskian approximation
- Application of computer algebra methods
- Gravitational waves
- Exact solutions
- Gauge-theoretical formulation of gravity
- Non-standard gravity theories (MAG, WC, EC, ST)
## Cosmology and Astrophysics- Cosmological tests (BBN, CMB, LSS, SNIa, X-ray gas masses, FRIIb)
- Weak-field approximations
- Cosmological data analysis and parameter estimation
- Building and testing of alternative cosmological models
## Geodesy- Gradiometry
- Clock networks
- Relativistic aspects of geodesy
## Computational / Mathematical- Computer algebra
- Simulation / Visualization
- Tensor calculus
- Covariant expansion techniques
- (Non)-Riemannian geometry
## GroupCurrently I am working as a researcher at University of Bremen (Center for applied space technology and microgravity, ZARM). Before that I worked as a researcher at the Max-Planck-Institute for Gravitational Physics (Albert-Einstein-Institute). Before that I worked as an assistant professor at the Tohoku University (Astronomical Institute). Before that I worked as a postdoctoral researcher at the Max-Planck-Institute for Gravitational Physics (Albert-Einstein-Institute). Before that I worked as a postdoc for the Institute for Theoretical Astrophysics at the University of Oslo . Before that I worked as postdoc for the Department of Physics and Astronomy at the Iowa State University . Formerly I was a member of the Cologne gravity group at the Institute for Theoretical Physics - University of Cologne. |