Jeans instability of a rotating partially ionized and strongly coupled plasma with Hall current

Jain, Shweta; Sharma, Prerana

doi:10.1017/s0022377816000313

Cited by 4 publications

(1 citation statement)

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“…investigated the anisotropic transport effects in dilute plasmas. Recently Jain & Sharma (2016) carried out the problem of Jeans instability of a rotating partially ionized and strongly coupled plasma with Hall current. So we conclude that FLR corrections is one of the anisotropic transport effects and is important in dilute astrophysical plasmas such as in the case of molecular cloud formation.…”

Section: Introductionmentioning

confidence: 99%

Molecular cloud formation via thermal instability of finite resistive viscous radiating plasma with finite Larmor radius corrections

Kaothekar¹

2017

Astrophys Space Sci

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The effect of radiative heat-loss function and finite ion Larmor radius (FLR) corrections on the thermal instability of infinite homogeneous viscous plasma has been investigated incorporating the effects of thermal conductivity and finite electrical resistivity for the formation of a molecular cloud. The general dispersion relation is derived using the normal mode analysis method with the help of relevant linearized perturbation equations of the problem. Furthermore the wave propagation along and perpendicular to the direction of external magnetic field has been discussed. Stability of the medium is discussed by applying Routh Hurwitz's criterion and it is found that thermal instability criterion determines the stability of the medium. We find that the presence of radiative heat-loss function and thermal conductivity modify the fundamental criterion of thermal instability into radiatively driven thermal instability criterion. In longitudinal direction FLR corrections, viscosity, magnetic field and finite resistivity have no effect on thermal instability criterion. The presence of radiative heat-loss function and thermal conductivity modify the fundamental thermal instability criterion into radiatively driven thermal instability criterion. Also the FLR corrections modify the growth rate of the Alfven mode. For transverse wave propagation FLR corrections, radiative heat-loss function, magnetic field and thermal conductivity modify the thermal instability criterion. From the curves it is clear that heat-loss function, FLR corrections and viscosity have stabilizing effect, while finite resistivity has destabilizing effect on the thermal modes. Our results show that the FLR corrections and radiative heat-loss functions affect the evolution of interstellar molecular clouds and star formation.

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Section: Introductionmentioning

confidence: 99%