Radiative and Gravitational Modes and Instabilities in an Inhomogeneous Magneto Dusty Plasma with Charge Variation

Sharma, Prerana; Patidar, Archana; Jain, S Bala; Vyas, Bharat

doi:10.1134/s1063780x19070109

Cited by 2 publications

(5 citation statements)

References 37 publications

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“…We numerically analyze the dispersion relation (25) to see how the ionization, recombination, polarization force, neutral dynamics and dust thermal velocity modify the growth rate of instabilities. For the numerical estimation, equation (25) is written in dimensionless form as For numerical calculations we have chosen the typical plasma parameters from [34,38,40,41] which are found in various astrophysical dusty plasma situations. In order to analyze the effects of various parameters on the growth rate of instabilities, we have plotted the real positive values of dimensionless growth rate of equation (34) versus the normalized wave number.…”

Section: Numerical Estimationmentioning

confidence: 99%

“…For the numerical estimation, equation (25) is written in dimensionless form as For numerical calculations we have chosen the typical plasma parameters from [34,38,40,41] which are found in various astrophysical dusty plasma situations. In order to analyze the effects of various parameters on the growth rate of instabilities, we have plotted the real positive values of dimensionless growth rate of equation (34) versus the normalized wave number. The results are presented in the form of figures 1-7.…”

Section: Numerical Estimationmentioning

confidence: 99%

“…The dust polarization force supports the process of gravitational collapse. Now, we have plotted equation (34) in figure 6 to see the effect of neutral thermal velocity (i.e. neutral thermal pressure) on growth rate of instability of the considered radiative dusty plasma system.…”

Section: Numerical Estimationmentioning

confidence: 99%

“…Sharma and Jain [33] have studied the RC instability in partially ionized self-gravitating dusty plasma taking into consideration the effect of polarization force. Sharma et al [34] have investigated the effect of polarization force and charge variation on radiative and gravitational instabilities in an inhomogeneous magnetized dusty plasma.…”

Section: Introductionmentioning

confidence: 99%

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Influence of ionization and ion loss on radiative and gravitational instabilities of inhomogeneous plasma with dust polarization force

Jain¹,

Sharma²

2021

Phys. Scr.

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In the present work, the radiative condensation and gravitational instabilities of inhomogeneous self-gravitating partially ionized dusty plasma have been studied with dust polarization force, ionization and recombination. The basic equations are constructed using four fluid model. The full dynamics of charged dust grains, ions and neutral species are employed considering the electrons as inertialess which have finite thermal conductivity and radiative cooling. The general dispersion relation is derived and discussed for different dusty plasma situations. It is found that the instability conditions are greatly affected due to the polarization force and recombination. Specifically, it is pointed out that the polarization force enhances the growth rate of both the radiative and gravitational instability while the recombination frequency decreases it. Both the parameters have influencing role in short wavelength regime. The e-folding times are calculated for maximum growth rates of gravitational and radiative condensation instabilities. The present work is applicable for study of interstellar molecular clouds and therefore the corresponding free fall time of molecular clouds is also presented.

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Section: Numerical Estimationmentioning

confidence: 99%

Section: Numerical Estimationmentioning

confidence: 99%

Section: Numerical Estimationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of ionization and ion loss on radiative and gravitational instabilities of inhomogeneous plasma with dust polarization force

Jain¹,

Sharma²

2021

Phys. Scr.

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“…In another effort to understand polarization force, Asaduzzaman et al [34] studied linear modes of dust acoustic waves in a non-uniform dusty plasma in the presence of such a polarizing force. The gravitational instability of magnetized dusty plasmas with collisional effects is studied including dust polarization force and dust charge variation along with radiatively cooled electron and ions by Sharma et al [35]. Saini et al [36] analytically examined the dust acoustic shock waves in dusty plasma considering polarization force.…”

Section: Introductionmentioning

confidence: 99%

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

Sharma¹,

Jain²,

Xavier³

2021

Phys. Scr.

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A theoretical investigation of Jeans instability has been done incorporating dust charge gradient and dust polarization forces in a collisional magnetized dusty plasma. The dispersion relation is derived using three fluid theory by employing Boltzmann distribution of ions and electrons and retaining the complete dynamics of positively charged dust. To signify the effects of each parameter on Jeans instability the obtained general dispersion relation is further deduced considering parallel and perpendicular modes of propagation. It has been analyzed analytically as well as numerically that the growth rate of gravitational instability decreases with simultaneous presence of charge gradient force, collision frequency, thermal velocity and external magnetic field, but increases with the dust polarization force. The existence of dust charge gradient force and dust polarization force (along with external magnetic field) have been found to improve the criterion for Jeans instability. The relevance of the work to the collapse of dusty clouds has been discussed.

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Radiative and Gravitational Modes and Instabilities in an Inhomogeneous Magneto Dusty Plasma with Charge Variation

Cited by 2 publications

References 37 publications

Influence of ionization and ion loss on radiative and gravitational instabilities of inhomogeneous plasma with dust polarization force

Influence of ionization and ion loss on radiative and gravitational instabilities of inhomogeneous plasma with dust polarization force

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

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