Works on a variety of topics in theoretical cosmology. One strand of his work concerns the detailed comparison between theoretical models and observations of heavy elements in the intergalactic medium, in order to derive constraints on processes involved in galaxy formation, and on the cosmic star formation history. A second strand focuses on understanding the global structure of inflationary universes, cosmological boundary conditions, and related issues. He has also done work on (and occasionally revisits) other topics including dark matter and alternatives to dark matter, intergalactic dust, the cosmic background radiation.
More information: scipp.ucsc.edu/~aguirre