Astrophysics and Space Science

, Volume 112, Issue 2, pp 391–395 | Cite as

Hall effects on thermal hydromagnetic instability of a partially ionized medium

  • K. C. Sharma
  • Sushma Sharma


Thermal instability of a finitely conducting hydromagnetic composite medium is considered including the effects of Hall currents and the collisions with neutrals. The equilibrium magnetic field is assumed to be uniform and vertical. For stationary convection, the collissions have no effect, while the Hall currents are found to have a destabilizing effect on the thermal instability. It is further shown that whenM is finite andQ→∞ the asymptotic behaviours of the critical Rayleigh number, the critical wave number and the critical temperature gradient remain the same as those obtained by Chandrasekhar whereM is a nondimensional number which includes the Hall current effects andQ stands for the Chandrasekhar number.


Convection Temperature Gradient Asymptotic Behaviour Critical Temperature Rayleigh Number 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Bhatia, P. K.: 1970,Nucl. Fusion 10, 383.Google Scholar
  2. Bhatia, P. K. and Gupta, O. P.: 1973,Publ. Astron. Soc. Japan 25, 541.Google Scholar
  3. Chandrasekhar, S.: 1961,Hydrodynamic and Hydromagnetic Stability, Clarendon Press, Oxford.Google Scholar
  4. Gupta, A. S.: 1967,Rev. Roumaine Math. Pures Appl. 12, 665.Google Scholar
  5. Hans, H. K.: 1968,Nucl. Fusion 8, 89.Google Scholar
  6. Hosking, R. J.: 1965,Phys. Rev. Letters 15, 344.Google Scholar
  7. Lehnert, B.: 1972, R. Inst. Technol. Stockholm Rep. NOSTRITA-EPP-7205, 06, and Proc. 5th European Conf. on Controlled Fusion and Plasma Physics. Grenoble, France, 21 May–August.Google Scholar
  8. Rao, S. S. and Kalra, G. L.: 1967,Can. J. Phys. 45, 2779.Google Scholar
  9. Sharma, R. C.: 1976,Physica C81, 199.Google Scholar
  10. Strömgren, B.: 1939,Astrophys. J. 89, 526.Google Scholar
  11. Taylor, R. J.: 1962,Nucl. Fusion Suppl. 877.Google Scholar

Copyright information

© D. Reidel Publishing Company 1985

Authors and Affiliations

  • K. C. Sharma
    • 1
  • Sushma Sharma
    • 1
    • 2
  1. 1.Department of MathematicsHimachal Pradesh UniversitySimlaIndia
  2. 2.Department of Bio-SciencesH.P. UniversitySimlaIndia

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