• Hydrostatic Gas Constraints On Supermassive Black Hole Masses: Implications For Hydrostatic Equilibrium And Dynamical Modeling In A Sample Of Early-Type Galaxies 

      Humphrey, Phillip J.; Buote, David A.; Brighenti, Fabrizio; Gebhardt, Karl; Mathews, William G. (2009-10)
      We present new mass measurements for the supermassive black holes (SMBHs) in the centers of three early-type galaxies. The gas pressure in the surrounding, hot interstellar medium (ISM) is measured through spatially resolved ...
    • The impact of x-rays on primordial minihalos 

      Oliveri, Anthony (2014-05)
      One of the current problems in cosmology is to understand how the first gravitationally- bound objects, or dark matter minihalos, evolved to form chemically rich, star-forming galaxies. The first stars to exist are believed ...
    • Multiwavelength Observations Of A0620-00 In Quiescence 

      Froning, Cynthia S.; Cantrell, Andrew G.; Maccarone, Thomas J.; France, Kevin; Khargharia, Juthika; Winter, Lisa M.; Robinson, Edward L.; Hynes, Robert I.; Broderick, Jess W.; Markoff, Sera; Torres, Manuel A. P.; Garcia, Michael; Bailyn, Charles D.; Prochaska, J. Xavier; Werk, Jessica; Thom, Chris; Beland, Stephane; Danforth, Charles W.; Keeney, Brian; Green, James C. (2011-12)
      We present contemporaneous X-ray, ultraviolet, optical, near-infrared, and radio observations of the black hole binary system, A0620-00, acquired in 2010 March. Using the Cosmic Origins Spectrograph on the Hubble Space ...
    • Multiwavelength Observations Of Swift J1753.5-0127 

      Froning, Cynthia S.; Maccarone, Thomas J.; France, Kevin; Winter, Lisa; Robinson, Edward L.; Hynes, Robert I.; Lewis, Fraser (2014-01)
      We present contemporaneous X-ray, ultraviolet (UV), optical, and near-infrared observations of the black hole binary system Swift J1753.5-0127 acquired in 2012 October. The UV observations, obtained with the Cosmic Origins ...
    • The Structure Of The Accretion Disk In The ADC Source 4U 1822-371 

      Bayless, A. J.; Robinson, E. L.; Hynes, R. I.; Ashcraft, T. A.; Cornell, M. E. (2010-07)
      The low-mass X-ray binary (LMXB) 4U 1822-371 has an accretion disk corona (ADC) that scatters X-ray photons from the inner disk and neutron star out of the line of sight. It has a high orbital inclination and the secondary ...