Welcome to my astrophysics homepage. I am a professor at the University of Surrey, UK and also maintain a small group at the ETH Zurich. My main area of research is in astrophysical probes of dark matter. I study everything from the tiniest galaxies in the Universe, where we can measure how dark matter clusters on the smallest scales, to giant clusters of galaxies, where we can produce real images of the distribution of dark matter using the gravitational lensing effect.

For further information, please see:

- ETH introductory lecture

- ETH group pages

- University of Surrey astrophysics pages