Browsing by Author "Lakhina, G. S."

Browsing by Author "Lakhina, G. S."

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  • Dust‐acoustic Waves with a Non‐thermal Ion Velocity Distribution 
    Singh, S. V.; Lakhina, G. S.; Bharuthram, R.; Pillay, S. R. (2002)
    The effect of a non-thermal ion velocity distribution is studied on linear and nonlinear dust-acoustic waves in an unmagnetized three component dusty plasma. For the linear theory, electrons are Boltzmann distributed, ions ...
  • The effect of charge separation on nonlinear electrostatic waves in a magnetized dusty plasma with two-temperature ions 
    Maharaj, S. K.; Bharuthram, R.; Pillay, S. R.; Singh, S. V.; Reddy, R. V.; Lakhina, G. S. (2008)
    In view of the observations of parallel (to Earth's magnetic field) spiky electric field structures by the FAST satellite, a theoretical study is conducted using a dusty plasma model comprising Boltzmann distributed hot ...
  • Electromagnetic ion cyclotron waves in the Earth’s magnetosphere with losscone distribution 
    Singh, Satyavir; Ojha, Biswajit; Lakhina, G. S. (2019)
    Satellite observations in the magnetosphere have shown that Pc 1, 2 waves with frequencies (0.1-5Hz) below the hydrogen gyrofrequency have left-handed to linear polarization and are related to electromagnetic ion cyclotron ...
  • Electrostatic solitary waves in the Venusian ionosphere pervaded by the solar wind: a theoretical perspective 
    Rubia, R.; Singh, S. V.; Lakhina, G. S.; Devanandhan, S.; Dhanya, M. B.; Kamalam, T. (2023)
    Electrostatic solitary waves (ESWs) in the Venusian ionosphere that are impinged by the solar wind are investigated using a homogeneous, collisionless, and magnetized multicomponent plasma consisting of Venusian H+ and ...
  • Interplanetary shocks between 0.3 and 1.0 au: Helios 1 and 2 Observations 
    Hajra, Rajkumar; Tsurutani, Bruce T.; Lakhina, G. S.; Lu, Quanming; Du, Aimin; Shan, Lican (2023)
    The Helios 1 (H1) and Helios 2 (H2) spacecraft measured the solar winds at a distance between ∼0.3 and 1.0 au from the Sun. With increasing heliocentric distance (rh), the plasma speed is found to increase at ∼34–40 km ...
  • Ion acoustic waves in lunar wake plasma 
    Sreeraj, T.; Singh, S. V.; Lakhina, G. S. (2023)
    Kinetic theory of low frequency electrostatic waves is carried out in the lunar wake plasma modelled by kappa electrons, kappa-beam electrons, Maxwell–Boltzmann distributed protons and doubly charged Helium ions. The present ...
  • Kinetic Alfvén waves excited by multiple free energy sources in the magnetotail 
    Barik, K. C.; Singh, S. V.; Lakhina, G. S. (2023)
    The generation of kinetic Alfvén waves (KAWs) is investigated through a three-component theoretical model incorporating ion beam and velocity shear as the sources of free energy in a non-Maxwellian κ-distributed plasmas. The ...
  • Kinetic study of ion acoustic waves in Venusian ionosphere 
    Kamalam, T.; Singh, S. V.; Sreeraj, T.; Lakhina, G. S. (2023)
    Kinetic dispersion of the ion acoustic waves has been explored for an unmagnetized five component plasma system comprising of Venusian protons, Venusian oxygen ions, Venusian electrons, solar wind protons, and kappa ...
  • Large amplitude dust-acoustic double layers in non-thermal plasmas with positive and negative dust 
    Maharaj, S. K.; Bharuthram, R.; Singh, S. V.; Pillay, S. R.; Lakhina, G. S. (2011)
    The existence of large amplitude double layers in a plasma composed of cold negative dust, adiabatic positive dust, non-thermal ions and Boltzmann electrons is investigated using the Sagdeev pseudopotential technique. ...
  • Linear macroscopic instabilities in space plasmas 
    Lakhina, G. S. (1994)
    Some of the linear macroinstabilities which can play important roles in space plasmas like the Earth's ionosphere and magnetosphere are discussed. Starting from the basic concept of plasma instabilities, we proceed to ...
  • A mechanism for large-amplitude parallel electrostatic waves observed at the Magnetopause 
    Lakhina, G. S.; Singh, Satyavir; Sreeraj, Thekkeyil; Devanandhan, Selvaraj; Rubia, Rajith (2023)
    Large-amplitude electrostatic waves propagating parallel to the background magnetic field have been observed at the Earth’s magnetopause by the Magnetospheric Multiscale (MMS) spacecraft. These waves are observed in the ...
  • Mirror Modes in the Heliosheath 
    Tsurutani, B. T.; Guarnieri, F. L.; Echer, E. E.; Lakhina, G. S.; Verkhoglyadova, O. P. (2010)
    Mirror mode (MM) structures are identified in the Voyager 1 heliosheath magnetic field data. Their characteristics are: (1) quasiperiodic structures with a typical scale size of {approx}57 {rho}{sub p}(proton gyroradii), ...
  • Nonlinear electrostatic waves in a magnetized dusty plasma with two-temperature ions 
    Maharaj, S. K.; Bharuthram, R.; Pillay, S. R.; Singh, S. V.; Reddy, R. V.; Lakhina, G. S. (2008)
    Nonlinear low frequency electrostatic waves which arise from the coupling between two linear modes, viz., the dust-acoustic and dust-cyclotron waves, are studied in a magnetized dusty plasma comprising Boltzmann electrons, ...
  • Nonlinear electrostatic waves in the auroral plasma 
    Singh, S. V.; Rubia, R.; Devanandhan, S.; Lakhina, G. S. (2020)
    Nonlinear electrostatic waves in a two-component magnetized plasma comprising of cold ions and suprathermal electrons following κ-distribution have been analyzed. The nonlinear electrostatic waves are considered to be ...
  • Numerical simulation of twisted solar corona 
    Parhi, S.; Pandey, B. P.; Goossens, M.; Lakhina, G. S. (1998)
    The solar corona supports a variety of waves generated by convective upwelling motion in the photosphere. In order to explain the observed coronal temperature profile, resonant absorption of MHD waves by coronal plasma ...
  • An observation-driven model of the equatorial ionosphere - DEOS rocket campaign study 
    Sojka, J.J.; Eccles, J.V.; Thiemann, H.; Sridharan, R.; Lakhina, G. S.; Rao, P. B.; Schunk, R.W. (2002)
    An ionosphere model for a single, low-latitude, magnetic meridion is driven with observation-determined drivers to produce electron density specifications containing day to day ionospheric weather. The drivers are vertical ...
  • On The Propagation And Modulation Of Electrostatic Solitary Waves Observed Near The Magnetopause On Cluster 
    Pickett, J. S.; Christopher, I. W.; Grison, B.; Grimald, S.; Santolík, O.; Décréau, P. M. E.; Lefebvre, B.; Engebretson, M. J.; Kistler, L. M.; Constantinescu, D.; Chen, L.‐J.; Omura, Y.; Lakhina, G. S.; Gurnett, D. A.; Cornilleau‐Wehrlin, N.; Fazakerley, A. N.; Dandouras, I.; Lucek, E. (2011)
    We present the results of a study of Electrostatic Solitary Waves (ESWs) in which propagation of a series of noncyclical ESWs is observed from one Cluster spacecraft to another over distances as great as tens of km and ...
  • Solitary waves observed in the auroral zone: the Cluster multi-spacecraft perspective 
    Pickett, J. S.; Kahler, S. W.; Chen, L.-J.; Huff, R. L.; Santolik, O.; Khotyaintsev, Y.; Décréau, P. M. E.; Winningham, D.; Frahm, R.; Goldstein, M. L.; Lakhina, G. S.; Tsurutani, B. T.; Lavraud, B.; Gurnett, D. A.; André, M.; Fazakerley, A.; Balogh, A.; Rème, H. (2004)
    We report on recent measurements of solitary waves made by the Wideband Plasma Wave Receiver located on each of the four Cluster spacecraft at 4.5-6.5RE (well above the auroral acceleration region) as they cross field lines ...
  • A Theoretical Model for the Generation of Kinetic Alfvén Waves in the Earth’s Magnetosphere by Ion Beam and Velocity Shear 
    Barik, K. C.; Singh, S. V.; Lakhina, G. S. (2019)
    A generation mechanism for kinetic Alfvén waves (KAWs) by ion-beam and velocity shear is discussed. For this, a three-component plasma model, consisting of cold background ions, hot electrons, and hot ion beams ...