Daniel Y Gezari

Daniel Y Gezari

  • EMERITUS
  • 301.286.3432
  • NASA/GSFC
  • Mail Code: 667
  • GREENBELT , MD 20771
  • Employer: EMERITUS
  • Brief Bio

    Dr. Gezari joined the Goddard Space Flight Center in Greenbelt, Maryland in 1978.  He has been a pioneer in the the development of several new fields of observational astronomy, including:

    1. First application of speckle interferometry (measuring diffraction-limited stellar diameters
            in images blurred by the Earth's atmosphere).
    2. First 350 µm observations, and the study of cool star forming clouds.
    3. Pioneered the use of array detectors for infrared astronomical imaging, especially at thermal
            infrared wavelengths (5-25 µm).
    4. Produced the only infrared astronomical catalog in the field of observational astronomy.
    5. In addition, Dr. Gezari has developed several useful compendia of astronomical research resources.

    Research Areas

    infrared astrophysics
    star formation/interstellar medium
    Galactic Center
    infrared array camera development
    optical spatial interferometry
    astronomical database management
    propagation of light in space
    invariance of the speed of light

    Projects

    Physical conditions and very young objects in Orion BN/KL
    Energy balance and luminosity sources in the Galactic Center
    Direct detection of extra-solar planets
    Experimental tests of special relativity

    Positions and Appointments

    Post Doctoral Research Fellow - California Institute of Technology (1974 - 1976)
    Resident Research Associate - National Research Council (1976 - 1978)
    Astrophysicist - NASA/Goddard (1976 - 2008)
    Astrophysicist (Emeritus) - NASA/Goddard (2008 - present)
    Research Associate - American Museum of Natural History, Astrophysics Dept. (2008 - present)

    Education

    A.B. (Physics), Cornell University, 1966
    M.S. (Physics), New York University, 1969
    Ph.D. (Astronomy), S.U.N.Y. at Stony Brook, 1973
    Robert A. Millikan Research Fellow in Astriohysics, California Institute of Technology, 1974-1976

    Selected Publications

    D.Y. Gezari, A. Labeyrie, and R.V. Stachnik, "Speckle Interferometry: Diffraction Limited Measurements of Nine Stars with the 200-inch Telescope," Ap.J. (Letters), 173, L1, 1972.

    A. Labeyrie, D. Bonneau, R.V. Stachnik, and D.Y. Gezari, "Speckle Interferometry III: High Resolution Measurements of Twelve Close Binary Systems," Ap.J. (Letters), 194, L147, 1974.

    R.R. Joyce, D.Y. Gezari, N.Z. Scoville, and I. Fuerenlid "2.12 H2 Emission: High Spectral Resolution Observations of the Orion Nebula," Ap.J. (Letters), 219, L29, 1978.

    D.Y. Gezari, "The Remarkable 400 mm Source NGC 6334/I(North)," Ap.J. (Letters), 259, L29, 1982.

    M.G. Hauser, R.F. Silverberg, M.T. Stier, T. Kelsall, D.Y. Gezari, E. Dwek, D. Walser, J.C. Mather, and L.H. Cheung, "Submillimeter Survey of the Galactic Plane from l = -5° to +62°: Energetics of the Inner Disk," Ap.J., 285, 74, 1984.

    R. Stachnik, P. Melroy, E. McCormack, D. Arnold, and D.Y. Gezari "Multiple Spacecraft Michelson Stellar Interferometer," Proc. S.P.I.E., 445, 358, 1984.

    D.Y. Gezari, R. Tresch-Fienberg, G. Fazio, W. Hoffmann, I. Gatley, G. Lamb, P. Shu, and C. McCreight "8.3 and 12.4 mm Imaging of the Galactic Center Source Complex with the Goddard IR Array Camera" Ap.J., 299, 1007, 1986.

    D. Gezari, M. Mumma, F. Espenak, D. Deming, G. Bjoraker, L. Woods, and W. Folz, "New Features in Saturn's Atmosphere Revealed by High Resolution Thermal Infrared Images," Nature, 342, 777, 1989.

    C. Roddier, F. Roddier, and D.Y. Gezari "Bibliography of Astronomical Optical Interferometry," NASA Reference Publication, NASA RP #1245, 1990.

    D. Aitkin, D.Y. Gezari, C.H. Smith, J.M.J. McCaughrean, and P.F. Roche, "Polarimetric Imaging of the Galactic Center at 12.4 microns: the Detailed Magnetic Field Structure of the Northern Arm and East-West Bar," Ap.J., 380, 419, 1991.

    D.Y. Gezari, W.C. Folz, L.A. Woods, and F. Varosi, "A 5 - 18 µm Array Camera for High Background Astronomical Imaging," P.A.S.P., 104, 191, 1991.

    D.Y. Gezari, "Mid-infrared Imaging of Orion BN/KL: Astrometry of IRc2 and the SiO Maser," Ap.J. (Letters), 363, L43, 1991.

    C.N. Telesco, and D.Y. Gezari, "High Resolution 12.4 µm Images of the Starburst Region in M82," Ap.J., 395, 461, 1992.

    D.Y. Gezari, J.M. Mead, and M. Schmitz, "Catalog of Infrared Observations (Parts I & II) - 3rd Edition," NASA RP#-1294, 1993.

    D.Y. Gezari, L.M. Ozernoy, F. Varosi, C. McCreight, and R.R. Joyce, "A New Upper Limit for the 20 mm Emission from SgrA*," (for submission to Ap.J. Letters).

    D.Y. Gezari, D. Backman, and M.W. Werner, "Mid-infrared Imaging of Orion BN/KL - II: Luminosity Sources, Extinction Distribution and the Role of IRc2," Ap. J. 509, 283, 1998.

    Greenhill, L. J.; Gezari, D. Y.; Danchi, W. C.; Najita, J.; Monnier, J. D.; Tuthill, P. G., "High Angular Resolution Mid-Infrared Imaging of Young Stars in Orion BN/KL," Ap.J. 605, L57 (2004)

    Fazio, G. G.; Hora, J. L.; Allen, L. E.; Ashby, M. L. N.; Barmby, P.; Deutsch, L. K.; Huang, J.-S.; Kleiner, S.; Marengo, M.; Megeath, S. T.; (and 55 coauthors), "The Infrared Array Camera (IRAC) for the Spitzer Space Telescope", Ap. J. Suppl, 154 (2004)

    Stolovy, S.; Ramirez, S.; Arendt, R. G.; Cotera, A.; Yusef-Zadeh, F.; Law, C.; Gezari, D.; Sellgren, K.; Karr, J.; Moseley, H.; Smith, H. A. "A Mid-infrared Survey of the Inner 2 x 1.5 Degrees of the Galaxy with Spitzer/IRAC", J. Phys. Conf. Ser., 54, 176 (2006).

    Gezari, D. Y.; Arendt, R. G.; Smith, R.; Stolovy, S.; Yusef-Zadeh, F.; Law, C.; Smith, H. A.; Moseley, H.; Ramirez, S.; Karr, J.; Coters, A., and Sellgren, K.; "Comparison of Spitzer/IRAC Galactic Center 3.6-8.0 μum survey results with X-ray emission in the central 40 x 40 parsecs", J. Phys. Conf. Ser., 54, 171 (2006).

    Orton G, Yanamandra-Fisher P, Fisher B, Friedson A, Parrish P, Nelson J, Bauermeister A, Fletcher L, Gezari D, Varosi F, Tokunaga A, Caldwell J, Baines K, Hora J, Ressler M, Fujiyoshi T, Fuse T, Hagopian H, Martin T, Bergstralh J, Howett C, Hoffmann W, Deutsch L, Van Cleve J, Noe E, Adams J, Kassis M, Tollestrup E., "Semi-Annual Oscillations in Saturn's Low-Altitude Stratospheric Temperatures,"  Nature, 453, 196  (2008).

    Schoedel R, Morris M, Muzic K, Alberdi A, Meyer L, Eckart A, Gezari D.,  "Mean Infrared Emission of Sagittarius A,"  Astron. Astrophys., 532, 14  (2011).

    Gezari, D. Y., Vinkovic, D., Elitzur, M., Varosi, F., Dwek, E., Greenhill, L. J., Danchi, W., Physical Properties of the "Pre-Protostellar" object IRc7 and Mid-infrared Emission Sources in the Orion BN/KL Complex", (2013, in preparation for Ap. J.).

    Gezari, D. Y., Varosi, F., Dwek, E., "Physical Conditions in the Galactic Center Modeled from Mid-infrared Imaging Photometry of the Central Parsec", (2013, in preparation for Ap. J.).

    Gezari, D. Y., "Experimental Basis for Special Relativity in the Photon Sector," arXiv:0912.3818 (2009).

    Gezari, D. Y., "Lunar Laser Ranging Test of the Invariance of c,"  arXiv:0912.3934  (2010).

    Gezari, D. Y., "Evidence of a Local Preferred Frame for the Propagation of Light,"  (2015, submitted to
    J. Opt .Soc.Am. B).




    Education

    A.B. (Physics), Cornell University, 1966
    M.S. (Physics), New York University, 1969
    Ph.D. (Astronomy), S.U.N.Y. at Stony Brook, 1973
    Post-doctoral Fellow, California Institute of Technology, 1974-1976

    Awards

    NASA Medal for Exceptional Scientific Achievement - 1989

    Brief Bio

    Dr. Gezari joined the Goddard Space Flight Center in Greenbelt, Maryland in 1978.  He has been a pioneer in the the development of several new fields of observational astronomy, including:

    1. First application of speckle interferometry (measuring diffraction-limited stellar diameters
            in images blurred by the Earth's atmosphere).
    2. First 350 µm observations, and the study of cool star forming clouds.
    3. Pioneered the use of array detectors for infrared astronomical imaging, especially at thermal
            infrared wavelengths (5-25 µm).
    4. Produced the only infrared astronomical catalog in the field of observational astronomy.
    5. In addition, Dr. Gezari has developed several useful compendia of astronomical research resources.

    Research Areas

    infrared astrophysics
    star formation/interstellar medium
    Galactic Center
    infrared array camera development
    optical spatial interferometry
    astronomical database management
    propagation of light in space
    invariance of the speed of light

    Projects

    Physical conditions and very young objects in Orion BN/KL
    Energy balance and luminosity sources in the Galactic Center
    Direct detection of extra-solar planets
    Experimental tests of special relativity

    Positions and Appointments

    Post Doctoral Research Fellow - California Institute of Technology (1974 - 1976)
    Resident Research Associate - National Research Council (1976 - 1978)
    Astrophysicist - NASA/Goddard (1976 - 2008)
    Astrophysicist (Emeritus) - NASA/Goddard (2008 - present)
    Research Associate - American Museum of Natural History, Astrophysics Dept. (2008 - present)

    Education

    A.B. (Physics), Cornell University, 1966
    M.S. (Physics), New York University, 1969
    Ph.D. (Astronomy), S.U.N.Y. at Stony Brook, 1973
    Robert A. Millikan Research Fellow in Astriohysics, California Institute of Technology, 1974-1976

    Selected Publications

    D.Y. Gezari, A. Labeyrie, and R.V. Stachnik, "Speckle Interferometry: Diffraction Limited Measurements of Nine Stars with the 200-inch Telescope," Ap.J. (Letters), 173, L1, 1972.

    A. Labeyrie, D. Bonneau, R.V. Stachnik, and D.Y. Gezari, "Speckle Interferometry III: High Resolution Measurements of Twelve Close Binary Systems," Ap.J. (Letters), 194, L147, 1974.

    R.R. Joyce, D.Y. Gezari, N.Z. Scoville, and I. Fuerenlid "2.12 H2 Emission: High Spectral Resolution Observations of the Orion Nebula," Ap.J. (Letters), 219, L29, 1978.

    D.Y. Gezari, "The Remarkable 400 mm Source NGC 6334/I(North)," Ap.J. (Letters), 259, L29, 1982.

    M.G. Hauser, R.F. Silverberg, M.T. Stier, T. Kelsall, D.Y. Gezari, E. Dwek, D. Walser, J.C. Mather, and L.H. Cheung, "Submillimeter Survey of the Galactic Plane from l = -5° to +62°: Energetics of the Inner Disk," Ap.J., 285, 74, 1984.

    R. Stachnik, P. Melroy, E. McCormack, D. Arnold, and D.Y. Gezari "Multiple Spacecraft Michelson Stellar Interferometer," Proc. S.P.I.E., 445, 358, 1984.

    D.Y. Gezari, R. Tresch-Fienberg, G. Fazio, W. Hoffmann, I. Gatley, G. Lamb, P. Shu, and C. McCreight "8.3 and 12.4 mm Imaging of the Galactic Center Source Complex with the Goddard IR Array Camera" Ap.J., 299, 1007, 1986.

    D. Gezari, M. Mumma, F. Espenak, D. Deming, G. Bjoraker, L. Woods, and W. Folz, "New Features in Saturn's Atmosphere Revealed by High Resolution Thermal Infrared Images," Nature, 342, 777, 1989.

    C. Roddier, F. Roddier, and D.Y. Gezari "Bibliography of Astronomical Optical Interferometry," NASA Reference Publication, NASA RP #1245, 1990.

    D. Aitkin, D.Y. Gezari, C.H. Smith, J.M.J. McCaughrean, and P.F. Roche, "Polarimetric Imaging of the Galactic Center at 12.4 microns: the Detailed Magnetic Field Structure of the Northern Arm and East-West Bar," Ap.J., 380, 419, 1991.

    D.Y. Gezari, W.C. Folz, L.A. Woods, and F. Varosi, "A 5 - 18 µm Array Camera for High Background Astronomical Imaging," P.A.S.P., 104, 191, 1991.

    D.Y. Gezari, "Mid-infrared Imaging of Orion BN/KL: Astrometry of IRc2 and the SiO Maser," Ap.J. (Letters), 363, L43, 1991.

    C.N. Telesco, and D.Y. Gezari, "High Resolution 12.4 µm Images of the Starburst Region in M82," Ap.J., 395, 461, 1992.

    D.Y. Gezari, J.M. Mead, and M. Schmitz, "Catalog of Infrared Observations (Parts I & II) - 3rd Edition," NASA RP#-1294, 1993.

    D.Y. Gezari, L.M. Ozernoy, F. Varosi, C. McCreight, and R.R. Joyce, "A New Upper Limit for the 20 mm Emission from SgrA*," (for submission to Ap.J. Letters).

    D.Y. Gezari, D. Backman, and M.W. Werner, "Mid-infrared Imaging of Orion BN/KL - II: Luminosity Sources, Extinction Distribution and the Role of IRc2," Ap. J. 509, 283, 1998.

    Greenhill, L. J.; Gezari, D. Y.; Danchi, W. C.; Najita, J.; Monnier, J. D.; Tuthill, P. G., "High Angular Resolution Mid-Infrared Imaging of Young Stars in Orion BN/KL," Ap.J. 605, L57 (2004)

    Fazio, G. G.; Hora, J. L.; Allen, L. E.; Ashby, M. L. N.; Barmby, P.; Deutsch, L. K.; Huang, J.-S.; Kleiner, S.; Marengo, M.; Megeath, S. T.; (and 55 coauthors), "The Infrared Array Camera (IRAC) for the Spitzer Space Telescope", Ap. J. Suppl, 154 (2004)

    Stolovy, S.; Ramirez, S.; Arendt, R. G.; Cotera, A.; Yusef-Zadeh, F.; Law, C.; Gezari, D.; Sellgren, K.; Karr, J.; Moseley, H.; Smith, H. A. "A Mid-infrared Survey of the Inner 2 x 1.5 Degrees of the Galaxy with Spitzer/IRAC", J. Phys. Conf. Ser., 54, 176 (2006).

    Gezari, D. Y.; Arendt, R. G.; Smith, R.; Stolovy, S.; Yusef-Zadeh, F.; Law, C.; Smith, H. A.; Moseley, H.; Ramirez, S.; Karr, J.; Coters, A., and Sellgren, K.; "Comparison of Spitzer/IRAC Galactic Center 3.6-8.0 μum survey results with X-ray emission in the central 40 x 40 parsecs", J. Phys. Conf. Ser., 54, 171 (2006).

    Orton G, Yanamandra-Fisher P, Fisher B, Friedson A, Parrish P, Nelson J, Bauermeister A, Fletcher L, Gezari D, Varosi F, Tokunaga A, Caldwell J, Baines K, Hora J, Ressler M, Fujiyoshi T, Fuse T, Hagopian H, Martin T, Bergstralh J, Howett C, Hoffmann W, Deutsch L, Van Cleve J, Noe E, Adams J, Kassis M, Tollestrup E., "Semi-Annual Oscillations in Saturn's Low-Altitude Stratospheric Temperatures,"  Nature, 453, 196  (2008).

    Schoedel R, Morris M, Muzic K, Alberdi A, Meyer L, Eckart A, Gezari D.,  "Mean Infrared Emission of Sagittarius A,"  Astron. Astrophys., 532, 14  (2011).

    Gezari, D. Y., Vinkovic, D., Elitzur, M., Varosi, F., Dwek, E., Greenhill, L. J., Danchi, W., Physical Properties of the "Pre-Protostellar" object IRc7 and Mid-infrared Emission Sources in the Orion BN/KL Complex", (2013, in preparation for Ap. J.).

    Gezari, D. Y., Varosi, F., Dwek, E., "Physical Conditions in the Galactic Center Modeled from Mid-infrared Imaging Photometry of the Central Parsec", (2013, in preparation for Ap. J.).

    Gezari, D. Y., "Experimental Basis for Special Relativity in the Photon Sector," arXiv:0912.3818 (2009).

    Gezari, D. Y., "Lunar Laser Ranging Test of the Invariance of c,"  arXiv:0912.3934  (2010).

    Gezari, D. Y., "Evidence of a Local Preferred Frame for the Propagation of Light,"  (2015, submitted to
    J. Opt .Soc.Am. B).




                                                                                                                                                                                            
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