Puragra (Raja) Guhathakurta

My research is focussed on the formation and evolution of galaxies. One approach is the study of the local "fossil record".  Our group at UCSC has been leading the SPLASH survey of red giant stars in our closest large neighbor, the Andromeda spiral galaxy (M31; see image below).  We have developed a sensitive method for identifying rare red giants in the remote outskirts of M31.  Studies of stellar kinematics, chemical abundance, and age distribution are used to investigate the merger history of M31's halo, tidal disruption of dwarf satellites, the dark matter content of M31 and its satellites, and Local Group dynamics.  A second approach is based on "direct look-back" to distant galaxies.  With colleagues Faber and Koo at UCSC and Davis at UCB, we have recently completed the DEEP2 survey of 50,000 distant galaxies using the DEIMOS spectrograph on the Keck II telescope.  An extension of this survey has been started in the Extended Groth Strip, and the spectra have been augmented by a truly panchromatic data set from the Chandra, GALEX, HST, and Spitzer telescopes to create AEGIS, the largest deeply imaged panchromatic region on the sky.  Other research interests include interstellar dust grains and their interaction with radiation, stellar populations of globular clusters, and optical transients.

Click image to enlarge.

Academic Bio

  • BSc, St Xavier's College, 1984
  • PhD, Princeton University, 1989
  • Web Site
  • Raja Guhathakurta
  • Grad Students
  • Karoline Gilbert
  • Evan Kirby
  • Kirsten Howley
  • Priya Kollipara
  • Post Docs
  • Jason Kalirai
  • Recent Advisees
  • Johnathan Rice
  • Katharine Fayram
  • Basilio Yniguez
  • Jennifer Consiglio
  • Marla Geha
  • Justin Howell
  • Mark Fardal
  • Research Groups
  • AEGIS
  • DEEP2
  • Splash
  • Contact Info
  • 831-459-5169

Research Centers

Research Groups

Latest News

Thirty-Meter Telescope focuses on two candidate sites Read more...

Doug Lin has a featured article in the May 2008 Scientific American entitled "The Chaotic Genesis of Planets." Read more...