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Spin-up of rubble-pile asteroids:Disruption,satellite formation,and equilibrium shapes
Asteroid, Dynamics Rotational dynamics Satellites,Dynamics
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2015/12/25
We present results from numerical experiments testing the behavior of cohesionless gravitational aggregates experiencing a gradual increase of angular momentum. The test bodies used in these numerical...
Asteroids:equilibrium shapes of rotating gravitational aggregates
Asteroids shapes–Numerical simulations–Solar System evolution
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2015/12/25
Many evidences lead us to think that a significant portion of asteroids are aggregates of boulders kept together by gravity, with little or no contribution from cohesive forces. The standard hydrodyna...
Numerical experiments with rubble piles:equilibrium shapes and spins
Asteroids Planetesimals Rotational dynamics Solid body tides Satellites of Jupiter
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2015/12/25
We present numerical experiments investigating the shape and spin limits of self-gravitating “perfect” rubble piles that consist of identical, smooth, rigid, spherical particles with configurable norm...
Non-equilibrium ionization model for stellar cluster winds and its application
NGC 3603 general
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2014/12/23
We have developed a self-consistent physical model for superstellar cluster winds based on combining a 1D steady-state adiabatic wind solution and a non-equilibrium ionization calculation. Comparing w...
A spectral code for non-equilibrium plasma and its applications
Spectrum Nonequilibrium plasma The program code
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2014/12/9
The spectral code for non-equilibrium plasma has been developed based on the updated atomic database. The first application is for winds from super stellar clusters for which a self-consistent physica...
On the equilibrium of self-gravitating neutrons, protons and electrons in β-equilibrium
equilibrium self-gravitating neutrons protons electrons β-equilibrium
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2011/10/9
We have recently proved the impossibility of imposing the condition of local charge neutrality in a self-gravitating system of degenerate neutrons, protons and electrons in $\beta$-equilibrium. The co...
Neutral and charged matter in equilibrium with black holes
Neutral charged matter equilibrium black holes
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2011/10/14
We study the conditions of a possible static equilibrium between spherically symmetric, electrically charged or neutral black holes and ambient matter. The following kinds of matter are considered: (1...
Existence of Equilibrium Points and their Linear Stability in the Generalized Photogravitational Chermnykh-Like Problem with Power-law Profile
Existence of Equilibrium Points and their Linear Stability in the Generalized Photogravitational Chermnykh-Like Problem with Power-law Profile
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2011/10/14
We consider the modified restricted three body problem with power-law density profile of disk, which rotates around the center of mass of the system with perturbed mean motion. Using analytical and nu...
Prediction of equilibrium Li isotope fractionation between minerals and aqueous solutions at high P and T: an efficient ab initio approach
equilibrium isotope fractionation aqueous solutions efficient initio approach
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2011/10/14
The mass-dependent equilibrium stable isotope fractionation between different materials is an important geochemical process. Here we present an efficient method to compute the isotope fractionation be...
The Evolution of the Large-scale ISM: Bubbles, Superbubbles and Non-Equilibrium Ionization
the Large-scale ISM Bubbles Superbubbles
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2011/1/11
The ISM, powered by SNe, is turbulent and permeated by a magnetic field (with a mean and a turbulent component). It constitutes a frothy medium that is mostly out of equilibrium and is ram pressure do...
MHD Simulations of Parker Instability Undergoing Cosmic-Ray Diffusion: Effect of the Initial Equilibrium Conditions on Mixing
cosmic rays magnetohydrodynamics instability numerical simulation
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2010/11/9
Parker instability arises from the presence of magnetic fields in a plasma such as the interstellar medium (ISM),wherein the magnetic buoyant pressure expels the gas and causes the gas to move along t...
Magnetohydrostatic equilibrium in starspots: dependences on color (T_{eff}) and surface gravity (g)
Solar and Stellar Astrophysics (astro-ph.SR)
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2010/12/23
Temperature contrasts and magnetic field strengths of sunspot umbrae broadly follow the thermal-magnetic relationship obtained from magnetohydrostatic equilibrium.
Effect of Perturbations in Coriolis and Centrifugal Forces on the Nonlinear Stability of Equilibrium Point in Robe's Restricted Circular Three-Body Problem
Perturbations Centrifugal Forces Coriolis three-body problem
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2009/9/4
The effect of perturbations in Coriolis and cetrifugal forces on the nonlinear stability of the equilibrium point of the Robe's (1977) restricted circular three-body problem has been studied when the ...
On Out of Plane Equilibrium Points in Photo-Gravitational Restricted
Radiation—Poynting–Robertson drag—binary stellar system—equilibrium points—stability
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2010/9/15
We have investigated the out of plane equilibrium points of a passive micron size particle and their stability in the field of radiating binary stellar systems Kr¨uger-60, RW-Monocerotis within the fr...
The equilibrium structure of cosmological halos: from dwarf galaxies to x-ray clusters
cosmological halos dwarf galaxies x-ray clusters
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2009/6/8
The equilibrium structure of cosmological halos: from dwarf galaxies to x-ray clusters。