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Browsing IIAP Publications by Title

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  • Three-body on-site interactions in ultracold bosonic atoms in optical lattices and superlattices 
    Singh, M; Dhar, A; Mishra, T; Pai, R. V; Das, B. P (American Physical Society, 2012-05)
    The Mott-insulator-superfluid transition for ultracold bosonic atoms in an optical lattice has been extensively studied in the framework of the Bose-Hubbard model with two-body on-site interactions. In this paper, we analyze ...
  • Three-component dust models for interstellar extinction 
    Muthumariappan, C (Springer, 2010-03)
    Interstellar extinction curves obtained from the ‘extinction without standard’ method were used to constrain the dust characteristics in the mean ISM (RV = 3.1), along the lines of sight through a high latitude diffuse ...
  • A three-dimensional automated classification scheme for the TAUVEX data pipeline 
    Bora, A; Gupta, R; Singh, H. P; Murthy, J; Mohan, Rekhesh; Duorah, K (Blackwell Publishing, 2008-02)
    In order to develop a pipeline for automated classification of stars to be observed by the Tel-Aviv University Ultra-Violet Experiment (TAUVEX) ultraviolet space telescope, we employ an artificial neural network (ANN) ...
  • Three-dimensional Monte Carlo dust radiative transfer study of the H-poor planetary nebula IRAS 18333–2357 located in M22 
    Muthumariappan, C (Oxford University Press on behalf of the Royal Astronomical Society, 2017-08)
    We analyse the characteristics of dust and its distribution in the planetary nebula IRAS 18333– 2357 located in M22 using a three-dimensional radiative transfer code HOCHUNK3D. The spectral energy distribution was ...
  • Three-dimensional simulations of magnetohydrodynamic waves in magnetized solar atmosphere 
    Vigeesh, G; Fedun, V; Hasan, S. S; Erdelyi, R (IOP Publishing, 2012-08-10)
    We present results of three-dimensional numerical simulations of magnetohydrodynamic (MHD) wave propagation in a solar magnetic flux tube. Our study aims at understanding the properties of a range of MHD wave modes generated ...
  • The Three-dimensional Structure of the Small Magellanic Cloud 
    Subramanian, S; Subramaniam, A (IOP Publishing, 2012-01-10)
    The three-dimensional structure of the inner Small Magellanic Cloud (SMC) is investigated using the red clump (RC) stars and the RR Lyrae stars (RRLS), which represent the intermediate-age and the old stellar populations ...
  • Three-dimensional structures of two solar active regions from VLA observations at 2, 6, and 20 centimeter wavelengths 
    Shevgaonkar, R. K; Kundu, M. R (The American Astronomical Society, 1984-08)
    Three-dimensional structures of two active region groups are determined from observations with the Very Large Array (VLA) at 2, 6, and 20 cm. One of the groups exhibits a single magnetic loop of length approximately 10 to ...
  • Tidal change in the energy of a spherical galaxy 
    Namboodiri, P. M. S; Kochhar, R. K (Royal Astronomical Society, 1990-03)
    Tidal effects of a massive perturber on a satellite galaxy have been studied by numerical simulations. The model consists of a spherical satellite galaxy and a point-mass perturber and the encounter is non-penetrating. A ...
  • Tidal disruption and tidal coalescence in binary stellar systems 
    Alladin, S. M; Parthasarathy, M (Royal Astronomical Society, 1978-09)
    Tidal effects in binary stellar systems are considered. The rate of increase of the binding energy of a component and the rate of decrease of the energy of the orbital motion of the binary are estimated under the simplifying ...
  • Tidal disruption model for the interacting pair of galaxies VV 117 (NGC 2444/45) 
    Narasimhan, K. S. V. S; Namboodiri, P. M. S; Alladin, S. M (Springer, 2003-09)
    A series of N-body simulations have been performed to interpret the interacting pair of galaxies VV 117 (NGC 2444/45). The galaxies have been modelled assuming a mass ratio two. The simulations use various values for the ...
  • Tidal transfer of energy and angular momentum to spheroidal galaxies 
    Som Sunder, G; Kochhar, R. K; Alladin, S. M (Royal Astronomical Society, 1990-06)
    The tidal transfer of energy and angular momentum to a spheriodal test galaxy is studied using tensor virial equations within the framework of impulse approximation. The tidally introduced angular momentum is always along ...
  • A time dependent model for spicule flow 
    Hasan, S. S; Venkatakrishnan, P (Kluwer Academic Publishers, 1981-09)
    A time dependent model for the flow of gas in a spicule is studied. In this model, the flow occurs in a magnetic flux sheath. Starting from hydrostatic equilibrium, the flux sheath is allowed to collapse normal to itself. ...
  • Time Dependent Radiative Transfer 
    Rao, Mohan. D (Indian Institute of Astrophysics, Bangalore, 1987)
  • Time dependent variation perturbation calculation of two-photon transition probability and hyperfine shift in hydrogen atom under plasma environment 
    Chaudhuri, S. K; Bhattacharyya, S; Chaudhuri, R. K; Mukherjee, P. K (Elsevier B. V, 2021-06-28)
    A new theoretical approach has been adopted to calculate the non-relativistic parity conserved two-photon transition probability (TPTP) from ground to excited S and D states along with the hyperfine splitting (HFS) of ...
  • The time splitting of decameter solar radio bursts 
    Sastry, Ch. V (Gordon and Breach, Science Publishers Ltd., 1971-03)
    Solar radio bursts were observed with a multi-channel receiver with frequency separations of 100 to 200 kHz: at a center frequency of 25 MHz. The time resolution was 15 msec. Some properties of double bursts are described.
  • Time structure of solar decametre Type III radio bursts 
    Thejappa, G; Sastry, Ch. V (Indian Academy of Sciences, 1982-06)
    The time structure of solar radio decameter Type III bursts occurring during the periods of enhanced emission is investigated. It is found that the time profiles can take a variety of forms of which three distinct types ...
  • Time variability of the He I 10830 A line profile 
    Singh, J; Jain, S. K; Venkatakrishnan, P (Springer, 1994-03)
    We have studied the time-dependent behavior of the He I 10830 A line. These studies show that (1) the fluctuations of the line width are uncorrelated with the equivalent-width fluctuations and (2) the autocorrelation curves ...
  • Time-dependent convective collapse of flux tubes 
    Hasan, S. S (D. Reidel Publishing Co, 1983)
    The time-dependent collapse of a slender flux tube extending vertically in the convection zone of the sun is modelled. Starting from an initial state in which the flux tube is in hydrostatic equilibrium, the non-linear MHD ...
  • Time-dependent interaction of granules with magnetic flux tubes 
    Venkatakrishnan, P; Hasan, S. S (Indian Academy of Sciences, 1981-06)
    The time-dependent interaction of the granulation velocity field with a magnetic flux tube is investigated here. It is seen that when a magnetic field line is displaced normal to itself so as to simulate thebuffeting action ...
  • A time-dependent multistate model for bacteriorhodopsin photocycle 
    Banyal, R. K; Hegde, G. M; Prasad, B. R; Reddy, K. P. J (Elsevier, 2005-02)
    A time-dependent theoretical model based on the rate equations for all the photochemical states of bacteriorhodopsin (bR) is developed. A recursive method is adopted to solve the rate equations exactly, with an explicit ...

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