101 citations · 645 across the 62 of their papers we have counts for
14 papers · 1 filter
55 Cancri: A Laboratory for Testing Numerous Conjectures about Planet Formation
Dimitris M. Christodoulou, Demosthenes Kazanas
Five planets are presently believed to orbit the primary star of 55 Cnc, but there exists a large 5 AU gap in their distribution between the two outermost planets. This gap has att…
Simulations of the Poynting--Robertson Cosmic Battery in Resistive Accretion Disks
Dimitris M. Christodoulou, Ioannis Contopoulos, Demosthenes Kazanas
We describe the results of numerical "2.5--dimensional" MHD simulations of an initially unmagnetized disk model orbiting a central point--mass and responding to the continual gener…
Exact Solutions of the Isothermal Lane--Emden Equation with Rotation and Implications for the Formation of Planets and Satellites
Dimitris M. Christodoulou, Demosthenes Kazanas
We have derived exact solutions of the isothermal Lane--Emden equation with and without rotation in a cylindrical geometry. The corresponding hydrostatic equilibria are most releva…
The Cosmic Battery Revisited
Ioannis Contopoulos Demosthenes Kazanas Dimitris M. Christodoulou
We reinvestigate the generation and accumulation of magnetic flux in optically thin accretion flows around active gravitating objects. The source of the magnetic field is the azimu…
Interchange Method in Compressible Magnetized Couette Flow: Magnetorotational and Magnetoconvective Instabilities
Dimitris M. Christodoulou, John Contopoulos, Demosthenes Kazanas
We obtain the general forms of the axisymmetric stability criteria in a magnetized compressible Couette flow using an energy variational principle, the so--called interchange or Ch…
Infrared Search for Young Stars in HI High-velocity Clouds
Z. Ivezic, D. M. Christodoulou
We have searched the IRAS Point Source Catalog and HIRES maps for young stellar objects (YSOs) in the direction of five \HI high-velocity clouds (HVCs). In agreement with optical s…
Phase-Transition theory of Instabilities. IV. Critical Points on the Maclaurin Sequence and Nonlinear Fission Processes
D. M. Christodoulou, D. Kazanas, I. Shlosman +1
We use a free-energy minimization approach to describe the secular and dynamical instabilities as well as the bifurcations along equilibrium sequences of rotating, self-gravitating…
Phase-Transition Theory of Instabilities. III. The Third-Harmonic Bifurcation on the Jacobi Sequence and the Fission Problem
D. M. Christodoulou, D. Kazanas, I. Shlosman +1
In Papers I and II, we have used a free-energy minimization approach that stems from the Landau-Ginzburg theory of phase transitions to describe in simple and clear physical terms…
Phase-Transition Theory of Instabilities. II. Fourth-Harmonic Bifurcations and Lambda-Transitions
D. M. Christodoulou, D. Kazanas, I. Shlosman +1
We use a free-energy minimization approach to describe the secular and dynamical instabilities as well as the bifurcations along equilibrium sequences of rotating, self-gravitating…
A new criterion for Bar-Forming Instability in Rapidly Rotating Gaseous and Stellar Systems. II. Nonaxisymmetric Form
D. M. Christodoulou, I. Shlosman, J. E. Tohline
We have previously introduced the parameter `alpha' as an indicator of stability to m=2 nonaxisymmetric modes in rotating, self-gravitating, axisymmetric, gaseous and stellar syste…
A new criterion for Bar-Forming Instability in Rapidly Rotating Gaseous and Stellar Systems. I. Axisymmetric Form
D. M. Christodoulou, I. Shlosman, J. E. Tohline
This paper has been removed by arXiv admin because it was an erroneous duplicate of astro-ph/9411031.
A New Criterion for Bar-Forming Instability in Rapidly Rotating Gaseous and Stellar Systems. I. Axisymmetric Form
D. M. Christodoulou, I. Shlosman, J. E. Tohline
We analyze previous results on the stability of uniformly and differentially rotating, self-gravitating, gaseous and stellar, axisymmetric systems to derive a new stability criteri…
Phase-Transition Theory of Instabilities.I.Second-Harmonic Instability and Bifurcation Points
D. M. Christodoulou, D. Kazanas, I. Shlosman +1
A free-energy minimization approach is used to address the secular & dynamical instabilities & the bifurcations along sequences of rotating, self-gravitating fluid and stellar syst…
Self-Gravity and Dissipation in Polar Rings
John Dubinski, Dimitris Christodoulou
We construct models of highly-inclined (``polar'') rings in an external potential including both self--gravity and dissipation due to a drag force. We adopt the oblate spheroidal s…