Large extragalactic surveys allow us to trace, in a statistical sense, how supermassive black holes, their host galaxies, and their dark matter halos evolve together over cosmic time, and so explore...
Hickox, Ryan C., Jones, Christine, Forman, William R., Murray, Stephen S., Kochanek, Christopher S., Eisenstein, Daniel, ...
We explore the connection between different classes of active galactic nuclei (AGNs) and the evolution of their host galaxies, by deriving host galaxy properties, clustering, and Eddington ratios of...
Extragalactic X-ray surveys are exceptionally powerful tools for studying the evolution of supermassive black holes and their host galaxies, by detecting large numbers of active galactic nuclei (AGN)...
The Star Formation and Nuclear Accretion Histories of Normal Galaxies in the AGES Survey (2009)
Watson, Casey R., Kochanek, Christopher S., Forman, William R., Hickox, Ryan C., Jones, Christine J., Brown, Michael J. I., ...
We combine IR, optical and X-ray data from the overlapping, 9.3 square degree NOAO Deep Wide-Field Survey (NDWFS), AGN and Galaxy Evolution Survey (AGES), and XBootes Survey to measure the X-ray...
Hickox, Ryan C., Jones, Christine, Forman, William R., Murray, Stephen S., Kochanek, Christopher S., Eisenstein, Daniel, ...
We explore the connection between different classes of active galactic nuclei (AGNs) and the evolution of their host galaxies, by deriving host galaxy properties, clustering, and Eddington ratios of...
Clustering, host galaxies, and evolution of AGN (2009)
Hickox, Ryan C., Collaboration, The Bootes Survey
We explore the connection between different classes of active galactic nuclei (AGNs) and the evolution of their host galaxies, by deriving host galaxy properties, clustering, and Eddington ratios of...
Can Chandra resolve the remaining cosmic X-ray background? (2007)
Hickox, Ryan C., Markevitch, Maxim
The deepest extragalactic X-ray observation, the 2 Ms Chandra Deep Field North (CDF-N), resolves ~80% of the total extragalactic cosmic X-ray background (CXB) in the 1-2 keV band. Recent work has...
Resolving the unresolved cosmic X-ray background in the Chandra Deep Fields (2007)
Hickox, Ryan C., Markevitch, Maxim
We present a measurement of the surface brightness of the cosmic X-ray background (CXB) in the Chandra Deep Fields, after excluding all detected X-ray, optical and infrared sources. The work is...
Abazajian, Kevork N., Markevitch, Maxim, Koushiappas, Savvas M., Hickox, Ryan C.
We present upper limits on line emission in the Cosmic X-ray background (CXB) that would be produced by decay of sterile neutrino dark matter. We employ the spectra of the unresolved component of the...
Hickox, Ryan C., Markevitch, Maxim
We present the absolute measurement of the unresolved 0.5-8 keV cosmic X-ray background (CXB) in the Chandra Deep Fields (CDFs) North and South, the longest observations with Chandra (2 Ms and 1 Ms,...
The Hypervelocity Star SDSS J090745.0+024507 is a Short-Period Variable (2005)
Fuentes, Cesar I., Stanek, K. Z., Gaudi, B. Scott, McLeod, Brian A., Bogdanov, Slavko B., Hartman, Joel D., ...
We present high-precision photometry of the hypervelocity star SDSS J090745.0+024507 (HVS), which has a Galactic rest-frame radial velocity of v=709 km/s, and so has likely been ejected from the...
Origin of the Soft Excess in X-ray Pulsars (2004)
Hickox, Ryan C., Narayan, Ramesh, Kallman, Timothy R.
The spectra of many X-ray pulsars show, in addition to a power law, a low-energy component that has often been modeled as a blackbody with kT ~ 0.1 keV. However the physical origin of this soft...