Buoyant Bubbles in Intracluster Gas: Effects of Magnetic Fields and Anisotropic Viscosity (2009)
Dong, Ruobing, Stone, James M.
Recent observations by Chandra and XMM-Newton indicate there are complex structures at the cores of galaxy clusters, such as cavities and filaments. One plausible model for the formation of such...
Turbulent resistivity driven by the magnetorotational instability (2009)
Fromang, Sebastien, Stone, James M.
We measure the turbulent resistivity in the nonlinear regime of the MRI, and evaluate the turbulent magnetic Prandtl number. We perform a set of numerical simulations with the Eulerian finite volume...
Broadband tunable optical parametric amplification from a single 50 MHz ultrafast fiber laser (2009)
Tzeng, Y. W., Lin, Y. Y., Huang, C. H., Liu, J. M., Chui, H. C., Liu, H. L., ...
We have demonstrated a 0.7 μm – 1.9 μm wavelength-tunable light source based on a single-pass optical parametric amplification (OPA) in a multiperiod magnesium oxide-doped periodically poled...
Ultrafast optical parametric oscillators for spectroscopy (2009)
Reid, Derryck T., Kornaszewski, Lukasz W., Muller, T. P., Gayraud, Nicolas, MacPherson, William N., Hand, Duncan P., ...
The combination of high spatial coherence, wide tunability and broad intrinsic bandwidth makes femtosecond optical parametric oscillators (OPO s) uniquely attractive sources for spectroscopy in the...
Anisotropic winds from close-in extra-solar planets (2008)
Stone, James M., Proga, Daniel
We present two-dimensional hydrodynamic models of thermally driven winds from highly irradiated, close-in extra-solar planets. We adopt a very simple treatment of the radiative heating processes at...
Dissipation and Heating in Supersonic Hydrodynamic and MHD Turbulence (2008)
Lemaster, M. Nicole, Stone, James M.
We study energy dissipation and heating by supersonic MHD turbulence in molecular clouds using Athena, a new higher-order Godunov code. We analyze the dependence of the saturation amplitude, energy...
BrainMaps.org - Interactive High-Resolution Digital Brain Atlases and Virtual Microscopy (2008)
Mikula, Shawn, Stone, James M., Jones, Edward G.
BrainMaps.org is an interactive high-resolution digital brain atlas and virtual microscope that is based on over 20 million megapixels of scanned images of serial sections of both primate and...
The Magnetothermal Instability in the Intracluster Medium (2008)
Parrish, Ian J., Stone, James M., Lemaster, M. Nicole
The electron mean free path in the intracluster medium (ICM) of galaxy clusters is much larger than the gyroradius; thus, heat is transported anisotropically along magnetic field lines. We show that...
Density Probability Distribution Functions in Supersonic Hydrodynamic and MHD Turbulence (2008)
Lemaster, M. Nicole, Stone, James M.
We study the probability distribution function (PDF) of the mass density in simulations of supersonic turbulence with properties appropriate for molecular clouds. For this study we use Athena, a new...
Spherical Accretion with Anisotropic Thermal Conduction (2008)
Sharma, Prateek, Quataert, Eliot, Stone, James M.
We study the effects of anisotropic thermal conduction on magnetized spherical accretion flows using global axisymmetric MHD simulations. In low collisionality plasmas, the Bondi spherical accretion...
Athena: A New Code for Astrophysical MHD (2008)
Stone, James M., Gardiner, Thomas A., Teuben, Peter, Hawley, John F., Simon, Jacob B.
A new code for astrophysical magnetohydrodynamics (MHD) is described. The code has been designed to be easily extensible for use with static and adaptive mesh refinement. It combines higher-order...
The Magnetohydrodynamics of Shock-Cloud Interaction in Three Dimensions (2008)
Shin, Min-Su, Stone, James M., Snyder, Gregory F.
The magnetohydrodynamic evolution of a dense spherical cloud as it interacts with a strong planar shock is studied, as a model for shock interactions with density inhomogeneities in the interstellar...
Kinematics of solid particles in a turbulent protoplanetary disc (2008)
Carballido, Augusto, Stone, James M., Turner, Neal J.
We perform numerical simulations of solid particle motion in a shearing box model of a protoplanetary disc. The accretion flow is turbulent due to the action of the magnetorotational instability....
BrainMaps.org - Interactive High-Resolution Digital Brain Atlases and Virtual Microscopy (2008)
Mikula, Shawn, Stone, James M., Jones, Edward G.
BrainMaps.org is an interactive high-resolution digital brain atlas and virtual microscope that is based on over 20 million megapixels of scanned images of serial sections of both primate and...
An Unsplit Godunov Method for Ideal MHD via Constrained Transport in Three Dimensions (2007)
Gardiner, Thomas A., Stone, James M.
We present a single step, second-order accurate Godunov scheme for ideal MHD which is an extension of the method described by Gardiner & Stone (2005) to three dimensions. This algorithm combines the...
James M. Stone, Dimitri Mihalas
We describe the use of upwind monotonic interpolation methods for the solution of the time-dependent radiative transfer equation in both optically thin and thick media. These methods, originally...
The Magnetic Collimation of Bipolar Outflows I: Adiabatic Simulations (2007)
James M. Stone, Michael L. Norman
The collimation of an isotropic, non-magnetic protostellar wind by an ordered magnetic field in the ambient medium is investigated using self-consistent magnetohydrodynamic simulations in...
James Stone And, James M. Stone, Dimitri Mihalas
We describe the use of upwind monotonic interpolation methods for the solution of the time-dependent radiative transfer equation in both optically thin and thick media. These methods, originally...
The Three Dimensional Interaction of a Supernova Remnant with an Interstellar Cloud (2007)
James M. Stone, Michael L. Norman
We present the hydrodynamic evolution in three-dimensions of a spherical bubble embed-ded in a less dense uniform ambient medium as it interacts with a Mach 10 planar shock. This scenario is an...
Interpreting the Molecular Hydrogen Emission from OMC--1 (2007)
Michael G. Burton, James M. Stone
Abstract. Intense emission lines of near--IR molecular hydrogen are excited in OMC--1 by shocks, as outflowing gas from the star forming core interacts with the surrounding molecular cloud. These...
The Magnetic Rayleigh-Taylor Instability in Three Dimensions (2007)
Stone, James M., Gardiner, Thomas
We study the magnetic Rayleigh-Taylor instability in three dimensions, with focus on the nonlinear structure and evolution that results from different initial field configurations. We study strong...
Nonlinear Evolution of the Magnetohydrodynamic Rayleigh-Taylor Instability (2007)
Stone, James M., Gardiner, Thomas A.
We study the nonlinear evolution of the magnetic Rayleigh-Taylor instability using three-dimensional MHD simulations. We consider the idealized case of two inviscid, perfectly conducting fluids of...
Faraday Rotation in Global Accretion Disk Simulations: Implications for Sgr A* (2007)
Sharma, Prateek, Quataert, Eliot, Stone, James M.
These Faraday rotation calculations of hot, thick accretion flows are motivated by the measured steady rotation measure (RM) of $\approx -6 \times 10^5$ rad m$^{-2}$ from Sgr A*. In our numerical...
Electron Heating in Hot Accretion Flows (2007)
Sharma, Prateek, Quataert, Eliot, Hammett, Gregory W., Stone, James M.
Local (shearing box) simulations of the nonlinear evolution of the magnetorotational instability in a collisionless plasma show that angular momentum transport by pressure anisotropy ($p_\perp \ne...
Socrates, Aristotle, Parrish, Ian J., Stone, James M.
We perform a linear magnetohydrodynamic perturbation analysis for a stratified magnetized envelope where the diffusion of heat is mediated by charged particles that are confined to flow along...
Effect of the Coriolis Force on the Hydrodynamics of Colliding Wind Binaries (2007)
Lemaster, M. Nicole, Stone, James M., Gardiner, Thomas A.
Using fully three-dimensional hydrodynamic simulations, we investigate the effect of the Coriolis force on the hydrodynamic and observable properties of colliding wind binary systems. To make the...
Saturation of the Magnetothermal Instability in Three Dimensions (2006)
Parrish, Ian J., Stone, James M.
In dilute astrophysical plasmas, thermal conduction is primarily along magnetic field lines, and therefore highly anisotropic. As a result, the usual convective stability criterion is modified from a...
Simulation of the Magnetothermal Instability (2006)
Parrish, Ian J., Stone, James M.
In many magnetized, dilute astrophysical plasmas, thermal conduction occurs almost exclusively parallel to magnetic field lines. In this case, the usual stability criterion for convective stability,...
Three Dimensional Compressible Hydrodynamic Simulations of Vortices in Disks (2006)
Shen, Yue, Stone, James M., Gardiner, Thomas A.
We carry out three-dimensional, high resolution (up to $1024^2\times 256$) hydrodynamic simulations of the evolution of vortices in vertically unstratified Keplerian disks using the shearing sheet...
Krumholz, Mark R., Stone, James M., Gardiner, Thomas A.
We present a method for simulating the evolution of HII regions driven by point sources of ionizing radiation in magnetohydrodynamic media, implemented in the three-dimensional Athena MHD code. We...
Technical Note Internet-enabled high-resolution brain mapping and virtual microscopy (2006)
Shawn Mikula, Issac Trotts, James M. Stone, Edward G. Jones
Virtual microscopy involves the conversion of histological sections mounted on glass microscope slides to high-resolution digital images. Virtual microscopy offers several advantages over traditional...
Hirose, Shigenobu, Krolik, Julian H., Stone, James M.
(shortened) We calculate the vertical structure of a local patch of an accretion disk in which heating by dissipation of MRI-driven MHD turbulence is balanced by radiative cooling. Heating, radiative...
Shearing Box Simulations of the MRI in a Collisionless Plasma (2005)
Sharma, Prateek, Hammett, Gregory W., Quataert, Eliot, Stone, James M.
We describe local shearing box simulations of turbulence driven by the magnetorotational instability (MRI) in a collisionless plasma. Collisionless effects may be important in radiatively inefficient...
Nonlinear Evolution of the Magnetothermal Instability in Two Dimensions (2005)
Parrish, Ian J., Stone, James M.
In weakly magnetized, dilute plasmas in which thermal conduction along magnetic field lines is important, the usual convective stability criterion is modified. Instead of depending on entropy...
Energetics in MRI driven Turbulence (2005)
Gardiner, Thomas A., Stone, James M.
In these proceedings we present recent efforts to understand the energetics of magnetohydrodynamic (MHD) turbulence driven by the magneto-rotational instability (MRI). These studies are carried out...
A New Godunov Scheme for MHD, with Application to the MRI in disks (2005)
Stone, James M., Gardiner, Thomas A.
We describe a new numerical scheme for MHD which combines a higher order Godunov method (PPM) with Constrained Transport. The results from a selection of multidimensional test problems are presented....
An Unsplit Godunov Method for Ideal MHD via Constrained Transport (2005)
Gardiner, Thomas A., Stone, James M.
We describe a single step, second-order accurate Godunov scheme for ideal MHD based on combining the piecewise parabolic method (PPM) for performing spatial reconstruction, the corner transport...
Carballido, Augusto, Stone, James M., Pringle, James E.
We calculate the radial diffusion coefficient for a passive contaminant in an accretion disc which is turbulent due to the action of the magnetorotational instability. Numerical MHD simulations are...
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...
Sano, Takayoshi, Inutsuka, Shu-ichiro, Turner, Neal J., Stone, James M.
The saturation level of the magnetorotational instability (MRI) is investigated using three-dimensional MHD simulations. The shearing box approximation is adopted and the vertical component of...
Magnetorotationally-Driven Galactic Turbulence and the Formation of Giant Molecular Clouds (2003)
Kim, Woong-Tae, Ostriker, Eve C., Stone, James M.
Using local 3D MHD simulations, we investigate ways in which galactic turbulence associated with the magnetorotational instability (MRI) may influence the formation and properties of GMCs. Our disk...
Spectral Properties of Compressible Magnetohydrodynamic Turbulence from Numerical Simulations (2003)
Vestuto, Jason G., Ostriker, Eve C., Stone, James M.
We analyze the spectral properties of driven, supersonic compressible magnetohydrodynamic (MHD) turbulence obtained via high-resolution numerical experiments, for application to understanding the...
A Local One-Zone Model of MHD Turbulence in Dwarf Nova Disks (2002)
Sano, Takayoshi, Stone, James M.
The evolution of the magnetorotational instability (MRI) during the transition from outburst to quiescence in a dwarf nova disk is investigated using three-dimensional MHD simulations. The shearing...
Local Magnetohydrodynamical Models of Layered Accretion Disks (2002)
Fleming, Timothy, Stone, James M.
Using numerical MHD simulations, we have studied the evolution of the magnetorotational instability in stratified accretion disks in which the ionization fraction (and therefore resistivity) varies...
Kim, Woong-Tae, Ostriker, Eve C., Stone, James M.
We use 3D MHD simulations to investigate nonlinear development of the Parker, magneto-Jeans (MJI), and swing mechanisms in galactic disks. The model disks are local, isothermal, and begin from a...
Sano, Takayoshi, Stone, James M.
The nonlinear evolution of the magnetorotational instability (MRI) in weakly ionized accretion disks, including the effect of the Hall term and ohmic dissipation, is investigated using local...
Sano, Takayoshi, Stone, James M.
The effect of the Hall term on the evolution of the magnetorotational instability (MRI) in weakly ionized accretion disks is investigated using local axisymmetric simulations. First, we show that the...
Gas Inflow in Barred Galaxies - Effects of Secondary Bars (2001)
Maciejewski, Witold, Teuben, Peter J., Sparke, Linda S., Stone, James M.
We report here results of high-resolution hydrodynamical simulations of gas flows in barred galaxies, with a focus on gas dynamics in the central kiloparsec. In a single bar with an Inner Lindblad...
Hydrodynamical Simulations of Jet- and Wind-driven Protostellar Outflows (2001)
Lee, Chin-Fei, Stone, James M., Ostriker, Eve C., Mundy, Lee G.
We present two-dimensional hydrodynamical simulations of both jet- and wind-driven models for protostellar outflows in order to make detailed comparisons to the kinematics of observed molecular...
A ballistic bow shock model for jet-driven protostellar outflow shells (2001)
Ostriker, Eve C., Lee, Chin-Fei, Stone, James M., Mundy, Lee G.
We analyze the dynamics of the shell produced when a bow shock from a collimated jet propagates into the surrounding medium. Under interstellar conditions, the shock is radiative, and a ballistic...
A Magnetohydrodynamic Nonradiative Accretion Flow in Three Dimensions (2001)
Hawley, John F., Balbus, Steven A., Stone, James M.
We present a global magnetohydrodynamic (MHD) three dimensional simulation of a nonradiative accretion flow originating in a pressure supported torus. The evolution is controlled by the...
Magnetohydrodynamical Non-radiative Accretion Flows in Two-Dimensions (2000)
Stone, James M., Pringle, James E.
We present the results of axisymmetric, time-dependent magnetohydrodynamic simulations of accretion flows around black holes. The calculations begin from a rotationally supported thick torus which...
Density, Velocity, and Magnetic Field Structure in Turbulent Molecular Cloud Models (2000)
Ostriker, Eve C., Stone, James M., Gammie, Charles F.
We use 3D numerical MHD simulations to follow the evolution of cold, turbulent, gaseous systems with parameters representing GMC conditions. We study three cloud simulations with varying mean...
MHD Models of Axisymmetric Protostellar Jets (2000)
Stone, James M., Hardee, Philip E.
We present the results of a series of axisymmetric time-dependent magnetohydrodynamic (MHD) simulations of the propagation of cooling, overdense jets, motivated by the properties of outflows...
Fleming, Timothy P., Stone, James M., Hawley, John F.
We present three-dimensional magnetohydrodynamic simulations of the nonlinear evolution of the magnetorotational instability (MRI) with a non-zero Ohmic resistivity. The properties of the saturated...
Hydrodynamical Non-radiative Accretion Flows in Two-Dimensions (1999)
Stone, James M., Pringle, James E., Begelman, Mitchell C.
Two-dimensional (axially symmetric) numerical hydrodynamical calculations of accretion flows which cannot cool through emission of radiation are presented. The calculations begin from an equilibrium...
Ostriker, Eve C., Gammie, Charles F., Stone, James M.
The molecular component of the Galaxy is comprised of turbulent, magnetized clouds, many of which are self-gravitating and form stars. To understand how these clouds' evolution may depend on their...
Dissipation in Compressible MHD Turbulence (1998)
Stone, James M., Ostriker, Eve C., Gammie, Charles F.
We report results of a three dimensional, high resolution (up to 512^3) numerical investigation of supersonic compressible magnetohydrodynamic turbulence. We consider both forced and decaying...
Nonlinear Evolution of the Magnetorotational Instability in Ion-Neutral Disks (1998)
Hawley, John F., Stone, James M.
We carry out three-dimensional magnetohydrodynamical simulations of the magnetorotational (Balbus-Hawley) instability in weakly-ionized plasmas. We adopt a formulation in which the ions and neutrals...
Dynamics on the Edge: Star-Disk Interaction (1998)
Our understanding of the dynamical processes which control the structure and evolution of the interaction region between an accretion disk and the central star is reviewed. If the central star is...
A radiation-driven disk wind model for massive young stellar objects (1998)
Drew, Janet E., Proga, Daniel, Stone, James M.
A radiation-driven disk wind model is proposed that offers great promise of explaining the extreme mass loss signatures of massive young stellar objects (the BN-type objects and more luminous Herbig...
Radiation driven winds from luminous accretion disks (1997)
Proga, Daniel, Stone, James M., Drew, Janet E.
We study the 2-D, time-dependent hydrodynamics of radiation-driven winds from accretion disks in which the radiation force is mediated by spectral lines. If the dominant contribution to the total...
Anatomy of a Merger: A Numerical Model of A754 (1997)
Roettiger, Kurt, Stone, James M., Mushotzky, Richarch F.
A754 is a well-observed cluster of galaxies which exhibits a variety of morphological peculiarities. These include a bar of X-ray emission that is offset significantly from the galaxy distribution,...
The Wardle Instability in Interstellar Shocks: II. Gas Temperature and Line Emission (1997)
Neufeld, David A., Stone, James M.
We have modeled the gas temperature structure in unstable C-type shocks and obtained predictions for the resultant CO and H2 rotational line emissions, using numerical simulations of the Wardle...
The Wardle Instability in Interstellar Shocks: I. Nonlinear Dynamical Evolution (1997)
The nonlinear evolution of unstable C-type shocks in weakly ionized plasmas is studied by means of time-dependent magnetohydrodynamical simulations. This study is limited to shocks in magnetically...
Systematic Errors in the Hubble Constant Based on Measurement of the Sunyaev-Zeldovich Effect (1997)
Roettiger, Kurt, Stone, James M., Mushotzky, Richard
Values of the Hubble constant reported to date which are based on measurement of the Sunyaev-Zeldovich (SZ) effect in clusters of galaxies are systematically lower than those derived by other methods...
X-Ray Clusters From A High Resolution Hydrodynamic Ppm Simulation Of The Cdm Universe (1994)
Greg Bryan, Renyue Cen, Michael L. Norman, Jeremiah P. Ostriker, James M. Stone
A new three dimensional Piecewise Parabolic Method (PPM) based hydrodynamic code is utilized to compute the distribution of hot gas in the standard COBE normalized CDM universe. Utilizing periodic...
James M. Stone, Dimitri Mihalas, Michael L. Norman
In this, the third of a series of three papers, we conclude a detailed description of ZEUS-2D, a numerical code for the simulation of fluid dynamical flows in astrophysics including a self-consistent...
James M. Stone, Michael L. Norman
In this, the first of a series of three papers, we begin a detailed description of ZEUS-2D, a numerical code for the simulation of fluid dynamical flows in astrophysics including a self-consistent...
A test suite for magnetohydrodynamical simulations (1992)
James M. Stone, John F. Hawley, Charles R. Evans
Received: ; Accepted: We have drawn together in this paper a collection of magnetohydrodynamic (MHD) problems that will provide researchers who have interests in modeling MHD phenomena with a battery...
James Stone And, James M. Stone, Michael L. Norman
In this, the second of a series of three papers, we continue a detailed description of ZEUS-2D, a numerical code for the simulation of fluid dynamical flows in astrophysics including a...
James Stone And, James M. Stone, Michael L. Norman
In this, the first of a series of three papers, we begin a detailed description of ZEUS-2D, a numerical code for the simulation of fluid dynamical flows in astrophysics including a self-consistent...
James Stone National, James M. Stone, Dimitri Mihalas, Michael L. Norman
In this, the third of a series of three papers, we conclude a detailed description of ZEUS-2D, a numerical code for the simulation of fluid dynamical flows in astrophysics including a self-consistent...
A Test Suite for Magnetohydrodynamical Simulations (1992)
James M. Stone, John F. Hawley, Charles R. Evans, Michael L. Norman
We have drawn together in this paper a collection of magnetohydrodynamic (MHD) problems that will provide researchers who have interests in modeling MHD phenomena with a battery of tests (a...
James M. Stone, Michael L. Norman
In this, the second of a series of three papers, we continue a detailed description of ZEUS-2D, a numerical code for the simulation of fluid dynamical flows in astrophysics including a...
Petrology of the granitic pluton at Oak Creek, Fremont County, Colorado /--by James M. Stone. (1988)
Typescript (photocopy).
Typescript.
Typescript.
The Scholastic aptitude test : College aptitude test or conventional intelligence test? (1976)
Thesis (M.A.)--Marquette University, 1976.