Modeling Flows Around Merging Black Hole Binaries (2009)
Van Meter, James R., Wise, John H., Miller, M. Coleman, Reynolds, Christopher S., Centrella, Joan M., Baker, John G., ...
Coalescing massive black hole binaries are produced by the mergers of galaxies. The final stages of the black hole coalescence produce strong gravitational radiation that can be detected by the...
Relativistic Broadening of Iron Emission Lines in a Sample of AGN (2009)
Brenneman, Laura W., Reynolds, Christopher S.
We present a uniform X-ray spectral analysis of eight type-1 active galactic nuclei (AGN) that have been previously observed with relativistically broadened iron emission lines. Utilizing data from...
Bogdanovic, Tamara, Reynolds, Christopher S., Balbus, Steven A., Parrish, Ian J.
We perform a suite of simulations of cooling cores in clusters of galaxies in order to investigate the effect of the recently discovered heat flux buoyancy instability (HBI) on the evolution of...
Constraints on the absorption-dominated model for the X-ray spectrum of MCG-6-30-15 (2009)
Reynolds, Christopher S., Fabian, Andrew C., Brenneman, Laura W., Miniutti, Giovanni, Uttley, Phil, Gallo, Luigi C.
Complexities in the X-ray spectrum of the nearby Seyfert 1.2 galaxy MCG-6-30-15 are commonly interpreted in terms of a broad iron line and the associated Compton reflection hump from the innermost...
Reaction of Accretion Disks to Abrupt Mass Loss During Binary Black Hole Merger (2008)
O'Neill, Sean M., Miller, M. Coleman, Bogdanovic, Tamara, Reynolds, Christopher S., Schnittman, Jeremy
The association of an electromagnetic signal with the merger of a pair of supermassive black holes would have many important implications. For example, it would provide new information about gas and...
O'Neill, Sean M., Reynolds, Christopher S., Miller, M. Coleman
We examine the evolution and influence of viscosity-induced diskoseismic modes in simulated black hole accretion disks. Understanding the origin and behavior of such oscillations will help us to...
Reynolds, Christopher S., Nowak, Michael A., Markoff, Sera, Tueller, Jack, Wilms, Joern, Young, Andrew J.
[abridged] We present an X-ray study of the low-luminosity active galactic nucleus (AGN) in NGC4258 using data from Suzaku, XMM-Newton, and the Swift/BAT survey. We find that signatures of X-ray...
Suzaku Observations of Local Ultraluminous Infrared Galaxies (2008)
Teng, Stacy H., Veilleux, Sylvain, Anabuki, Naohisa, Dermer, Charles D., Gallo, Luigi C., Nakagawa, Takao, ...
We report the results from our analysis of {\it Suzaku} XIS (0.5-10 keV) and HXD/PIN (15-40 keV) observations of five well-known local ULIRGs: {\em IRAS} F05189-2524, {\em IRAS} F08572+3915, Mrk 273,...
Regulation of thermal conductivity in hot galaxy clusters by MHD turbulence (2008)
Balbus, Steven A., Reynolds, Christopher S.
The role of thermal conduction in regulating the thermal behavior of cooling flows in galaxy clusters is reexamined. Recent investigations have shown that the anisotropic Coulomb heat flux caused by...
Reynolds, Christopher S., Miller, M. Coleman
We present a detailed temporal analysis of a set of hydrodynamic and magnetohydrodynamic (MHD) simulations of geometrically-thin (h/r~0.05) black hole accretion disks. The black hole potential is...
A deep Chandra observation of Abell 4059: a new face to radio-mode AGN feedback? (2008)
Reynolds, Christopher S., Casper, Elyse A., Heinz, Sebastian
A deep Chandra observation of the cooling core cluster Abell 4059 (A4059) is presented. Previous studies have found two X-ray cavities in the central regions of A4059 together with a ridge of X-ray...
Broad iron K-alpha emission lines as a diagnostic of black hole spin (2007)
Reynolds, Christopher S., Fabian, Andrew C.
We address the ability of broad iron emission lines from black hole accretion disks to diagnose the spin of the black hole. Using a high-resolution 3-dimensional MHD simulation of a...
Christopher S. Reynolds, Kazushi Iwasawa
We present an analysis of the long Rossi X-ray Timing Explorer (RXTE) observation of the Seyfert 1 galaxy MCG\Gamma6-30-15, taken in July 1997. We have earlier used the data to place constraints for...
Philip R. Maloney, Christopher S. Reynolds
We have obtained a moderately long (10 5 s) ASCA observation of the Seyfert 1 galaxy Markarian 231, the most luminous of the local ultraluminous infrared galaxy population. In the best-fitting model...
Anita Krishnamurthi, Christopher S. Reynolds, Jerey L. Linsky
We present results from a 36-ksec observation of the core of the Pleiades open cluster using ACIS-I on the Chandra X-ray Observatory. We have detected 57 sources, most of which do not have previously...
Philip J. Armitage, Christopher S. Reynolds, Apj Submitted, Apj Submitted
We use three dimensional magnetohydrodynamic simulations, in a pseudo-Newtonian potential, to study geometrically thin accretion disc flows crossing r ms, the marginally stable circular orbit around...
Christopher Reynolds Draft, Christopher S. Reynolds
We use the method of Press, Rybicki & Hewitt (1992) to search for time lags and time leads between different energy bands of the RXTE data for MCG--6-30-15. We tailor our search in order to probe...
Broad Iron Lines in Active Galactic Nuclei: A possible test of the Kerr Metric? (2007)
Jörn Wilms, Roland Speith, Christopher S. Reynolds
. The broad lines in Active Galactic Nuclei (AGN) discovered recently have been interpreted as evidence for emission close to the central black hole. We briefly describe the physical processes...
Anita Krishnamurthi, Christopher S. Reynolds, Jeffrey L. Linsky, Eduardo Marti N
We present results from a 36 ks observation of the core of the Pleiades open cluster using ACIS-I on the Chandra X-Ray Observatory. We have detected 57 sources, most of which do not have previously...
Christopher S. Reynolds, Mitchell C. Begelman
fluorescence from within the innermost stable
Christopher S. Reynolds, Andrew J. Young, Andrew C. Fabian
The relativistically broad X-ray iron line seen in many AGN spectra is thought to originate from the central regions of the putative black hole accretion disk. Both the line profile and strength will...
Christopher S. Reynolds, Andrew C. Fabian
We present hard X-ray observations of the nearby radio galaxy M87 and the core of the Virgo cluster using the Rossi X-ray Timing Explorer. These are the first hard X-ray observations of M87 not...
Energetic Impact of Jet Inflated Cocoons in Relaxed Galaxy Clusters (2007)
Vernaleo, John C., Reynolds, Christopher S.
Jets from active galactic nuclei (AGN) in the cores of galaxy clusters have the potential to be a major contributor to the energy budget of the intracluster medium (ICM). To study the dependence of...
Possible X-ray diagnostic for jet/disk dominance in Type 1 AGN (2007)
Mattson, Barbara J., Weaver, Kimberly A., Reynolds, Christopher S.
Using Rossi X-ray Timing Explorer Seyfert 1 and 1.2 data spanning 9 years, we study correlations between X-ray spectral features. The sample consists of 350 time-resolved spectra from 12 Seyfert 1...
Alignment of the spins of supermassive black holes prior to coalescence (2007)
Bogdanovic, Tamara, Reynolds, Christopher S., Miller, M. Coleman
Recent numerical relativistic simulations of black hole coalescence suggest that in certain alignments the emission of gravitational radiation can produce a kick of several thousand kilometers per...
Accretion Processes in AGN : The X-Ray View (2007)
We discuss constraints on the physics of the inner accretion disk, as well as the properties of the black hole itself, that can be derived by a detailed examination of the relativistically broadened...
Winter, Lisa M., Mushotzky, Richard F., Reynolds, Christopher S.
(abridged) In this paper, we examined XMM Newton EPIC spectra of 14 ultra-luminous X-ray sources (ULXs)in addition to the XMM RGS spectra of two sources (Holmberg II X-1 and Holmberg IX X-1). We...
AGN Heating of Cooling Flow Clusters: Problems with 3D Hydrodynamic Models (2006)
Vernaleo, John C., Reynolds, Christopher S.
We have performed a set of high resolution, three dimensional simulations of a jetted AGN embedded in a relaxed cooling cluster. To the best of our knowledge, these are the first simulation to...
Constraining Black Hole Spin Via X-ray Spectroscopy (2006)
Brenneman, Laura W., Reynolds, Christopher S.
We present an analysis of the observed broad iron line feature and putative warm absorber in the long 2001 XMM-Newton observation of the Seyfert-1.2 galaxy MCG-6-30-15. The new "kerrdisk" model we...
Trapping of magnetic flux by the plunge region of a black hole accretion disk (2006)
Reynolds, Christopher S., Garofalo, David, Begelman, Mitchell C.
The existence of the radius of marginal stability means that accretion flows around black holes invariably undergo a transition from a MHD turbulent disk-like flow to an inward plunging flow. We...
The influence of radio-galaxy activity on X-ray absorption lines from the intracluster medium (2006)
Koeckert, Franziska, Reynolds, Christopher S.
We present an investigation of the X-ray absorption features predicted by hydrodynamic simulations of radio galaxies interacting with the intracluster medium (ICM) of their host galaxy clusters. We...
Oxygen and Iron Abundances in Nearby Galaxies Using Ultraluminous X-ray Sources (2005)
Winter, Lisa M., Mushotzky, Richard F., Reynolds, Christopher S.
We determined oxygen and iron abundances of the interstellar medium (ISM) using K-shell (O) and L-shell (Fe) X-ray photo-ionization edges towards Ultra luminous X-ray sources (ULXs). We determine the...
AGN Feedback and Cooling Flows: Problems with Simple Hydrodynamical Models (2005)
Vernaleo, John C., Reynolds, Christopher S.
In recent years it has become increasingly clear that Active Galactic Nuclei, and radio-galaxies in particular, have an impact on large scale structure and galaxy formation. In principle,...
Sporadically Torqued Accretion Disks Around Black Holes (2005)
Garofalo, David, Reynolds, Christopher S.
The assumption that black hole accretion disks possess an untorqued inner boundary, the so-called zero torque boundary condition, has been employed by models of black hole disks for many years....
The Interaction of 3C401 with the Surrounding Intracluster Medium (2004)
Reynolds, Christopher S., Brenneman, Laura W., Stocke, John T.
We present an observation of the radio-galaxy 3C401 and the surrounding intracluster medium (ICM) of its host galaxy cluster by the Chandra X-ray Observatory. This luminous radio-galaxy is notable in...
Black Hole Spin in AGN and GBHCs (2004)
Reynolds, Christopher S., Brenneman, Laura W., Garofalo, David
We discuss constraints on black hole spin and spin-related astrophysics as derived from X-ray spectroscopy. After a brief discussion about the robustness with which X-ray spectroscopy can be used to...
Iron Line Spectroscopy of NGC4593 with XMM-Newton: Where is the Black Hole Accretion Disk? (2004)
Reynolds, Christopher S., Brenneman, Laura W., Wilms, Joern, Kaiser, Mary Elizabeth
We present an analysis of the 2-10keV XMM-Newton/EPIC-pn spectrum of the Seyfert-1 galaxy NGC4593. Apart from the presence of two narrow emission lines corresponding to the Kalpha lines of cold and...
Buoyant radio-lobes in a viscous intracluster medium (2004)
Reynolds, Christopher S., McKernan, Barry, Fabian, Andrew C., Stone, James M., Vernaleo, John C.
(Abridged) Ideal hydrodynamic models of the intracluster medium (ICM) in the core regions of galaxy clusters fail to explain both the observed temperature structure of this gas, and the observed...
Kaspi, Shai, Brandt, W. N., Collinge, M. J., Elvis, Martin, Reynolds, Christopher S.
We present three Far Ultraviolet Spectroscopic Explorer (FUSE) observations of the Narrow-Line Seyfert 1 galaxy NGC4051. The most prominent features in the far-ultraviolet (FUV) spectrum are the OVI...
Choi, Yun Young, Reynolds, Christopher S., Heinz, Sebastian, Rosenberg, Jessica L., Perlman, Eric S., Yang, Jongmann
(abridged) We present a detailed reanalysis of the Chandra data for the galaxy cluster Abell 4059 and its central radio galaxy, PKS2354-35. We also present new 1.4GHz and 4.7GHz CnB-array radio data...
Choi, Yun-Young, Reynolds, Christopher S., Heinz, Sebastian, Rosenberg, Jessica L., Perlman, Eric S., Yang, Jongmann
The variability of accretion onto Schwarzschild black holes from turbulent magnetized discs (2003)
Armitage, Philip J., Reynolds, Christopher S.
We use global magnetohydrodynamic simulations, in a pseudo-Newtonian potential, to investigate the temporal variability of accretion discs around Schwarzschild black holes. We use the...
Fluorescent iron lines as a probe of astrophysical black hole systems (2002)
Reynolds, Christopher S., Nowak, Michael A.
(abridged) With most physicists and astrophysicists in agreement that black holes do indeed exist, the focus of astrophysical black hole research has shifted to the detailed properties of these...
Heinz, Sebastian, Choi, Yun-Young, Reynolds, Christopher S., Begelman, Mitchell C.
We present Chandra observations of the galaxy cluster A4059. We find strong evidence that the FR-I radio galaxy PKS 2354-35 at the center of A4059 is inflating cavities with radii ~20 kpc in the...
Wilms, Joern, Reynolds, Christopher S., Begelman, Mitchell C., Reeves, James, Molendi, Silvano, Stuabert, Ruediger, ...
We present XMM-Newton European Photon Imaging Camera (EPIC) observations of the bright Seyfert 1 galaxy MCG-6-30-15, focusing on the broad Fe K$\alpha$ line at ~6keV and the associated reflection...
A variable efficiency for thin disk black hole accretion (2001)
Reynolds, Christopher S., Armitage, Philip J.
We explore the presence of torques at the inner edges of geometrically-thin black hole accretion disks using 3-dimensional magnetohydrodynamic (MHD) simulations in a pseudo-Newtonian potential. By...
Collinge, M. J., Brandt, W. N., Kaspi, Shai, Crenshaw, D. Michael, Elvis, Martin, Kraemer, Steven B., ...
We present the results from simultaneous observations of the Narrow-Line Seyfert 1 galaxy NGC 4051 with the Chandra High Energy Transmission Grating Spectrometer and the HST Space Telescope Imaging...
Magnetohydrodynamic simulations of black hole accretion (2001)
Reynolds, Christopher S., Armitage, Philip J., Chiang, James
We discuss the results of three-dimensional magnetohydrodynamic simulations, using a pseudo-Newtonian potential, of thin disk (h/r ~ 0.1) accretion onto black holes. We find (i) that magnetic...
ASCA Observation of an X-Ray-Luminous Active Nucleus in Markarian 231 (2000)
Maloney, Philip R., Reynolds, Christopher S.
We have obtained a moderately long (100 kilosecond) ASCA observation of the Seyfert 1 galaxy Markarian 231, the most luminous of the local ultraluminous infrared galaxy (ULIRG) population. In the...
Observations of the core of the Pleiades with the Chandra X-ray Observatory (2000)
Krishnamurthi, Anita, Reynolds, Christopher S., Linsky, Jeffrey L., Martin, Eduardo, Gagna, Marc
We present results from a 36-ksec observation of the core of the Pleiades open cluster using ACIS-I on the Chandra X-ray Observatory. We have detected 57 sources, most of which do not have previously...
Simulations of accretion flows crossing the last stable orbit (2000)
Armitage, Philip J., Reynolds, Christopher S., Chiang, James
We use three dimensional magnetohydrodynamic simulations, in a pseudo-Newtonian potential, to study geometrically thin accretion disc flows crossing the marginally stable circular orbit around black...
Christopher S. Reynolds, Jörn Wilms, J Orn Wilms
It has recently been suggested that Compton downscattering may give rise to the broad iron lines seen in the X-ray spectra of Seyfert 1 galaxies. This challenges the standard model in which these...
X-ray Signatures of Evolving Radio Galaxies (1998)
Heinz, Sebastian, Reynolds, Christopher S., Begelman, Mitchell C.
We present a simple model for an evolving radio galaxy, as it expands into the hot, X-ray emitting interstellar medium (ISM) of its host galaxy or similarly into the hot intracluster medium (ICM) of...
Iron fluorescence from within the innermost stable orbit of black hole accretion disks (1997)
Reynolds, Christopher S., Begelman, Mitchell C.
The fluorescent iron Ka line is a powerful observational probe of the inner regions of black holes accretion disks. Previous studies have assumed that only material outside the radius of marginal...