International Astronomical Union American Astronomical Society Royal Astronomical Society Institute of Physics
Areas of expertise
I work on the large-scale structure of the Universe and the properties of the massive objects contained within it, using both observation and theory.
I worked on NASA's Chandra satellite before launch, and use it and other space-based and ground-based telescopes from X-ray to optical to radio bands to study galaxies, especially those hosting massive black holes and showing signs of unusual activity.
In these areas I give professional and public presentations, but I also speak and write on more general astronomical and cosmological topics.
I have done a number of pieces for BBC local radio and Radio 4, and written articles of varying lengths for public and semi-professional publications. I give several public lectures each year, to astronomical societies and more general audiences.