Astrophysics Seminars

I describe my preliminary results in calculating the extragalactic backgrounds from star-forming galaxies at all energies. First, I construct very simple models of galaxies using relations like the Schmidt law. This lets me estimate quantities...

The Large Synoptic Survey Telescope is a large-aperture, wide-field, ground-based telescope designed to take deep images of the entire southern sky in six optical colors every few nights. The resulting database can be used to address a wide variety...

ABSTRACT: The Cosmic Microwave Background Radiation is our most important source of information about the early universe. Many of its features are in good agreement with the predictions of the so-called standard model of cosmology -- the Lambda Cold...

After reionization, a largely uniform ~1 Rydberg background pervaded the Universe, keeping the intergalactic hydrogen extremely ionized. The characteristics of this background depend on the properties of the sources (quasars and galaxies) and the...

ABSTRACT: Astronomers have given two independent sets of names to a single set of phenomena -- the aberrations of images by telescopes and by non-uniform mass distributions. One such phenomenon is called astigmatism when it arises in telescopes and...