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Browsing by Author "Krishan, V"

Browsing by Author "Krishan, V"

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  • Generation of kinetic helicity from irrotational motions 
    Krishan, V; Chitre, S. M (Astronomical Society of India, 1999)
    Vortical and helical fluctuations are an integral part of any turbulent fluid. A turbulent magnetohydrodynamic system with net kinetic helicity is known to support the growth of a large scale magnetic field through the ...
  • Generation of Magnetic Structures on the Solar Photosphere 
    Gangadhara, R. T; Krishan, V; Bhowmick, A. K; Chitre, S. M (IOP Publishing, 2014-06-20)
    The lower solar atmosphere is a partially ionized plasma consisting of electrons, ions, and neutral atoms. In this, which is essentially a three-fluid system, the Hall effect arises from the treatment of the electrons and ...
  • Hall effect and ambipolar diffusion in the lower solar atmosphere 
    Krishan, V (World Scientific, 2008)
  • Hall-magnetohydrodynamic turbulence 
    Krishan, V; Mahajan, S. M (Anita Publications, 2005)
  • HALL-MHD turbulence in the Solar atmosphere 
    Krishan, V; Mahajan, S. M (Springer, 2004-03)
    When the velocity field of a magneto-fluid is accorded an intrinsically equal status with the magnetic field, standard magnetohydrodynamics (MHD) must be replaced by the dispersive or Hall MHD which retains some crucial ...
  • Hall-MHD Turbulence in the Solar Wind 
    Krishan, V; Mahajan, S. M (The Royal Swedish Academy of Sciences, 2005)
    The solar wind is a great paradigm for investigating magnetohydrodynamic turbulence. It is shown that the frame work of Hall magnetohydrodynamics (HMHD), which can support three quadratic invariants and allows nonlinear ...
  • Harmonically related decimetric fine structures 
    Sawant, H. S; Fernandes, F. C. R; Karlický, M; Mészárosová, H; Krishan, V; Cecatto, J. R; Madsen, F. R. H; Andrade, M. C (Elsevier B.V., 2006-02)
    We report rare events, above 1000 MHz, in which emission at the fundamental and at second harmonic frequencies show nearly identical fine structures. These high resolution observations are obtained from the Brazilian Solar ...
  • Heating of the Solar Corona 
    Krishan, V (Indian Institute of Astrophysics, Bangalore, 1988)
    The maintenance of the million degree solar corona continues to be a challenging and an inspiring problem. There are basically two different mechanisms of heating depending upon the dominance or otherwise of the magnetic ...
  • High energy universe -- Satellite missions 
    Krishan, V (Indian Academy of Sciences, 2000-12)
    A variety of satellite missions to observe the high energy universe are currently operating and some more with more versatility and capability are on the anvil. In this paper, after giving a brief introduction to the ...
  • High resolution studies of intermediate drift bursts 
    Fernandes, F. C. R; Krishan, V; Andrade, M. C; Cecatto, J. R; Freitas, D. C; Sawant, H. S (Elsevier B. V., 2003)
    We report high resolution observations of the Intermediate Drift (IMD) bursts in decimetric band (ν = 950 2650 MHz). With a time resolution of 20 - 50 ms and a frequency resolution of 4 - 10 MHz, we are able to estimate ...
  • High resolution time profile of decimetric type-III bursts 
    Cecatto, J. R; Sawant, H. S; Fernandes, F. C. R; Krishan, V; Neri, J. A. C. F; Moraes, J. C (Elsevier B. V., 2003)
    Type-III bursts are signatures of the electron beams accelerated during the solar flares, their observation and investigation provide information of the acceleration processes, the characteristics of the exciting agent and ...
  • Induced magnetization of Alfven waves 
    Chakraborty, B; Khan, M. R; Sarkar, Susmita; Krishan, V; Bhattacharyya, B (Elsevier, 1990-07)
    The induced magnetization of propagating and standing Alfven waves (IMPAW and IMSAW, respectively) in plasmas, due to the inverse Faraday effect, is investigated here. This effect follows from the magnetic moment per unit ...
  • An Interpretation of the Millisecond time variation in Hard X-ray solar flares 
    Krishan, V; Kundu, M. R (International Astronomical Union, 1985)
    Recent observations of the fast time variability in the hard X-ray emission from solar flares are interpreted. The fast spikes are assumed to be superimposed on the thermal X-ray emission. The rise and fall of a spike are ...
  • Introduction to Supernova Phenomena 
    Krishan, V (Indian Institute of Astrophysics, 1988)
  • Inverse Cascade in Hydrodynamic Turbulence and its Role in Solar Granulation 
    Krishan, V (International Astronomical Union, 1990)
    Self-organization i.e the formation of large ordered structures in a turbulent medium is a consequence of inverse cascade where energy preferentially transfers towards large spatial scales. It is envisaged that this may ...
  • Irregular Singularity of the Magnetorotational Instability in a Keplerian Disk 
    Furukawa, M; Yoshida, Z; Hirota, M; Krishan, V (University of Chicago Press, 2007-04)
    The center of a Keplerian disk is an irregular singularity for the eigenfunctions of magnetorotational instabilities. The system is studied using the small-radius approximation, which by no means implies that the analysis ...
  • Is 21-cm absorption associated with the emission-line regions of quasars? 
    Krishan, V (Royal Astronomical Society, 1988-03)
    The 21-cm absorption line observed in several QSO systems is believed to originate in neutral hydrogen clouds in the vicinity of the QSOs. The aim of this paper is to show that 21-cm absorption can also originate in a ...
  • Is the Hubble flow a result of inverse cascade? 
    Krishan, V (Indian Academy of Sciences, 1996-10)
  • The justice delayed the case of Lise Meitner 
    Krishan, V (Indian Academy of Sciences, 1991-06)
  • Kinetic Equilibria of Accretion Discs 
    Bhaskaran, P; Krishan, V (Springer, 1995-10)
    A kinetic description of the equilibrium structure of accretion disc plasma is presented. It is possible to have an equilibrium configuration for a stationary axisymmetric gravitating plasma disc with spatial gradients in ...

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