Gregory Tarlè

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Greg Tarle


Office Location(s): 359 West Hall
Labs: 3222, 3223, 3231 Randall (763.7636)
Phone: 734.763.1489

  • Fields of Study
    • Experimental Particle Astrophysics and Cosmology
  • About

    Professor Tarlé's research focuses on the nature of dark energy and dark matter and the acceleration and sources of cosmic rays.

    The Dark Energy Survey (DES)

    The Dark Energy Survey (DES) is an imaging survey that will employ multiple techniques (Galaxy Clusters, Weak Lensing, Supernovae and Baryon Acoustic Oscillations) to explore the nature of Dark Energy.  DES consists of a giant wide-field camera deployed on the Blanco 4-m telescope at the Cerro-Tololo Interamerican Observatory in Chile. The first light is in Fall 2011.

    The Big Baryon Oscillation Spectroscopic Survey (BigBOSS)

    The Big Baryon Oscillation Spectroscopic Survey (BigBOSS) is a massive spectroscopic survey that will collect high-resolution spectra of tens of millions of galaxies over a 5-year period.  BigBOSS consists of a robotic 5000-fiber spectrograph that will be deployed on the Mayall 4-m telescope at KPNO.  It will tightly constrain the Dark Energy equation of state by studying the evolution of the BAO feature in three dimensions.


    PandaX will be the first 1 Ton liquid Xe detector to perform a direct search for dark matter.  It will consist of a dual phase LXe Time Projection Chamber located in the Jinping II Hydropower tunnel in China.

    The Cosmic Ray Electron Synchrotron Telescope (CREST)

    The Cosmic Ray Electron Synchrotron Telescope (CREST) is a balloon experiment designed to determine the mechanism for acceleration of cosmic ray electrons. Circling the continent of Antarctica for several weeks, CREST will measure the synchrotron radiation generated by ultrahigh-energy electrons in the Earth’s magnetic field. At energies of several TeV and above, individual sources should reveal themselves in the energy spectrum.

    Professor Tarlé is a Fellow of the American Physical Society.

    Selected Publications

    Measurement of the Cosmic-Ray Antiproton-to-Proton Abundance Ratio between 4 and 50 GeV (A. S. Beach et al., HEAT Collaboration), Phys. Rev. Lett. 87, 271101, 1-4 (2001). Also featured in Nature Physics Portal Research Highlights, “Balloon Settles Debate” (December 10, 2001).

    Cosmic Antimatter (Gregory Tarlé and Simon P. Swordy), Scientific American 278, 36-41 (April, 1998).

    Magnetic Monopole Search with the MACRO Detector at Gran Sasso (M. Ambrosio et al., MACRO Collaboration), Phys. Lett. B 486, 249 (1997).

    Extension of the Parker Bound on the Flux of Magnetic Monopoles (Fred C. Adams, Marco Fatuzzo, Katherine Freese, Gregory Tarlé, Richard Watkins, and M.S. Turner), Phys. Rev. Lett. 70, 2511 (1993).

  • Education
    • California Institute of Technology B.S. 1972
    • University of California, Berkeley Ph.D. 1978.