Professor of Astronomy
Director of Undergraduate Studies
Research interests: The study of gamma-ray bursts, optical transients (mainly from the Pan-STARRS project), and magnetic fields in low-mass stars and brown dwarfs. He uses observations across the electromagnetic spectrum, from radio to γ-rays.
Research Interests: Cosmology and extragalactic astronomy with a mix of theoretical and observational methods; the development of the baryon acoustic oscillation method to measure the cosmic distance scale and study dark energy.
Research interests: Observations of supernovae for themselves and for cosmology using HST, Magellan, MMT, and the Whipple Observatory. Use of rest frame infrared observations for Type Ia supernovae to improve measurements of dark energy properties. Ongoing Hubble Space Telescope study of SN 1987A, the brightest since 1604!
Research Interests: His cosmology research focuses on observations of the cosmic microwave background (CMB) to reveal signatures of the physics that drove the birth of the universe, the creation of its structure, and its present-day expansion. His research over the past two decades has involved the design, deployment, and operation of multiple generations of radio telescopes at the Amundsen-Scott Station at the South Pole.
Research Interests: Radio and radar techniques: applications to astrometry, astrophysics, geophysics, planetary physics, and tests of theories of gravitation; Pre-college and college science education: curriculum development and teacher training.