Stephen Warren

Stephen Warren is a Professor of Astrophysics at Imperial College London's Department of Physics, part of the Faculty of Natural Sciences. He has been at Imperial since 1994, previously holding postdoctoral fellowships at institutions like Steward Observatory and ESO. His research focuses on observational astronomy, including surveys for high-redshift quasars, brown dwarfs, gravitational lensing, and quasar absorption lines. He led the UKIRT Infrared Deep Sky Survey as Survey Scientist until 2012 and served as Head of Astrophysics at Imperial from 2010 to 2015.

Education: BA and PhD (1988) from the University of Cambridge. His academic positions include Consul for the Faculty of Natural Sciences & Education Office at Imperial College London since 2020.

Research interests emphasize discovering celestial objects through surveys and understanding their properties. His work spans quasar environments, galaxy mass modeling, and brown dwarf characterization. Recent publications highlight advancements in gravitational lensing models, Milky Way vertical structure analysis, and Euclid mission predictions for high-redshift quasars.

Affiliations include the Astrophysics Group, Physics of the Universe, and Space Lab at Imperial. His contributions to large surveys and observational techniques have been foundational in extragalactic astronomy and sub-stellar object classification.