Prof. Yoel Rephaeli

Emeritus in School of Physics and Astronomy
ביה"ס לפיזיקה ואסטרונומיה אמריטוס
Prof. Yoel Rephaeli
Phone: 03-6407809
Fax: 03-6405141
Office: Kaplun, 112


Prof. Yoel Rephaeli pursues a range of topics in cosmology and high-energy astrophysics, including: properties of the cosmic microwave background (CMB) radiation; calculations of spectral and spatial signatures produced by the interaction of the CMB with hot gas in galaxy clusters; use of galaxy clusters as improved cosmological probes by joint, multi-spectral analyses of current and future microwave, optical, and X-ray measurements; studies of non-thermal phenomena (e.g., energetic particles, magnetic fields) in star-forming galaxies, radio galaxies, and galaxy clusters by comparisons of predictions from modeling the particle spectro-spatial distributions and their radiative yields (from all relevant leptonic and hadronic processes) with radio, X-ray, and gamma-ray measurements.


Research achievements include: dynamical analyses of mass profiles of several galaxy clusters; development of a new expanded merger-tree description of galaxy cluster evolution; neutrino mass inference from surveys of CMB signatures imprinted by Compton scattering in galaxy clusters; successful prediction of the level of gamma-ray emission in nearby starburst galaxies (measured by the Fermi satellite).


Future directions include: improved determination of galaxy cluster properties from planned CMB measurements with the Simons Observatory telescope array; detailed modeling of the distributions of energetic electrons and protons in galactic halos.


  • B.Sc. in Physics and Mathematics, Hebrew University, 1972

  • Ph.D. in Physics, University of California, San Diego, 1977

Academic Appointments

  • Research Associate, Cornell University, 1978-1980

  • Research Associate, Institute for Theoretical Physics, UC Santa Barbara, 1980-1982

  • Senior Lecturer, School of Physics & Astronomy, Tel Aviv University, 1982-1987

  • Associate Professor, School of Physics & Astronomy, Tel Aviv University, 1987-1994

  • Visiting Professor, Physics Department, UC San Diego, 1991-1992

  • Senior Physicist, Center for Atrophysics & Space Sciences, 1993-Present

  • Chair, Department of Astronomy & Astrophysics, 1993-1994

  • Professor, School of Physics & Astronomy, Tel Aviv University, 1994-Present

  • Visiting Scientist, Center for Astroparticle Physics, UC Berkely, 1994-1995

  • Visiting Professor, Physics Department, Stanford University, 1996-1997

  • Chair, Department of Astronomy & Astrophysics, 1997-2002

  • Visiting Scientist, SLAC, Stanford University, 2003-2004

  • Jack Adler Chair in Extragalactic Astronomy, School of Physics & Astronomy, Tel Aviv University, 2011-Present

  • Visiting Scientist, SLAC, Stanford University, July-October 2013

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