Equilibrium configuration of self-gravitating charged dust clouds: Particle approach

Abstract

A three dimensional Molecular Dynamics (MD) simulation is carried out to explore the equilibrium configurations of charged dust particles. These equilibrium configuration are of astrophysical significance for the conditions of molecular clouds and the interstellar medium. The interaction among the dust grains is modeled by Yukawa repulsion and gravitational attraction. The spherically symmetric equilibria are constructed which are characterized characterized by three parameters: (i) the number of particles in the cloud, (ii) Γg (defined in the text) where Γ −1 g is the short range cutoff of the interparticle potential, and (iii) the temperature of the grains. The effects of these parameters on dust cloud are investigated using radial density profile. The problem of equilibrium is also formulated in the mean field limit where total dust pressure which is the sum of kinetic pressure and electrostatic pressure, balances the self-gravity. The mean field solutions agree well with the results of MD simulations. Astrophysical significance of the results is briefly discussed.

Propagatory dynamics of nucleus-acoustic waves excited in gyrogravitating degenerate quantum plasmas electrostatically confined in curved geometry

“…The different subplots link to the (a) pure NR limit, (b) pure UR limit, (c) conjoint NR-UR limit, respectively. The different multiparametric input values used here are taken from the literature 1 , 2 , 7 , 24 , 28 , 34 given as: , , , , , , , , , , , . As clearly visible from the distinct coloured lines (Fig.…”

“…3 b) limits. It can be ascribed to ECP effects, dominating more in weakly coupled plasmas 24 , 34 . Higher the -value, higher is the ECP 24 , 34 (due to higher ); and vice-versa.…”

“…It can be ascribed to ECP effects, dominating more in weakly coupled plasmas 24 , 34 . Higher the -value, higher is the ECP 24 , 34 (due to higher ); and vice-versa. Thus, an enhanced ECP suppresses the instability growth (higher- , lower- ); and vice-versa.…”

The effect of dust charge-gradient and dust polarization forces on the Jeans instability in a collisional magnetized dusty plasma

“…2 2 2 The wave perturbations are incorporated in the linearized set of equations ( 9)-( 11) to obtain the perturbed form of dust number density which is further used to deduce the general dispersion relation as given in equation (16). The linearized perturbed dust number density is derived as follows.…”

“…Dusty plasma or complex plasma comprises of additional charged particles (termed as dust) in comparison to electron-ion plasma [1,2]. The interaction between the plasma and charged dust grains brings forth a whole new range of features that intrigues the researchers trying to develop applications of plasma physics [3,4].…”