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Browsing IIAP Publications by Title

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  • 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 ...
  • Time-distance helioseismology of deep meridional circulation 
    Rajaguru, S. P; Antia, H. M (Springer, 2020)
    A key component of solar interior dynamics is the meridional circulation (MC), whose poleward component in the surface layers has been well observed. Time-distance helioseismic studies of the deep structure of MC, however, ...
  • Time-latitude distribution of prominences for 10 solar cycles: a study using Kodaikanal, Meudon, and Kanzelhohe data 
    Chatterjee, S; Manjunath, H; Banerjee, D; Ravindra, B; McIntosh, Scott W (Wiley-Blackwell Publishing Ltd, 2020-03)
    Solar prominences are structures of importance because of their role in polar field reversal. We study the long-term variation of the time latitude distribution of solar prominences in this article. To accomplish this, ...
  • Time-resolved spectral observations of spicule velocities at several heights 
    Hasan, S. S; Keil, S. L (American Astronomical Society, 1984-08)
    The vacuum telescope of the National Solar Observatory, Sacramento Peak was used to obtain H-alpha spectral observations of spicules. A set of spectra corresponding to five slit positions above the solar limb were recorded ...
  • TINI: a mission for FUV spectroscopy of extended objects 
    Diebold, S; Barnstedt, J; Chandra, B; Conti, L; Ghatul, N; Kappelmann, N; Mohan, R; Murthy, J; Nair, B; Prabha, C; Rai, R; Safonova, M; Stelzer, B; Werner, K (SPIE-The International Society for Optical Engineering, 2022-08)
    The far ultraviolet (FUV, 91.2 nm to 180 nm) is the wavelength region with the greatest density of absorption and emission lines. However, despite of being one of the most exciting parts of the astrophysical spectrum, ...
  • TIRSPEC: TIFR Near Infrared Spectrometer and Imager 
    Ninan, J. P; Ojha, D. K; Ghosh, S. K; D'Costa, S. L. A; Naik, M. B; Poojary, S. S; Sandimani, P. R; Meshram, G. S; Jadhav, R. B; Bhagat, S. B; Gharat, S. M; Bakalkar, C. B; Prabhu, T. P; Anupama, G. C; Toomey, D. W (World Scientific Publishing Co., 2014-12)
    We describe the TIFR Near Infrared Spectrometer and Imager (TIRSPEC) designed and built in collaboration with M/s. Mauna Kea Infrared LLC, Hawaii, USA, now in operation on the side port of the 2-m Himalayan Chandra Telescope ...
  • TNO or Comet? The Search for Activity and Characterization of Distant Object 418993 (2009 MS9) 
    Bufanda, Erica; Meech, Karen J; Kleyna, Jan T; Hainaut, Olivier R; Bauer, James M; Stephens, Haynes; Veres, Peter; Micheli, Marco; Keane, Jacqueline V; Weryk, Robert; Wainscoat, Richard; Sahu, D. K; Bhatt, B. C (American Astronomical Society, 2023-01)
    The perihelion of the trans-Neptunian object (TNO) 2009 MS9 brings it close to the distance where some longperiod comets are seen to become active. Knowing this, and the fact that this object appears to brighten in excess ...
  • Topological and statistical properties of nonlinear force-free fields 
    Mangalam, A; Prasad, A (Elsevier B.V, 2018-01)
    We use our semi-analytic solution of the nonlinear force-free field equation to construct three-dimensional magnetic fields that areapplicable to the solar corona and study their statistical properties for estimating the ...
  • Topological evolution and cosmic chaos 
    Tomaschitz, Roman (Elsevier, 1997-10)
    An account on the origins of cosmic chaos and its physical impact in an open and multiply connected universe is given. A new type of cosmic evolution by topological deformations, unpredicted by Einstein's equations, is ...
  • Toroidal magnetic field structure of the solar convective envelope inferred from the initial observations of the sunspots 
    Hiremath, K. M; Lovely, M. R (Elsevier B.V., 2012-05)
    For different life spans, we measure the line of sight component of the magnetic field structure of the bipolar sunspots from the SOHO/MDI magnetograms during their initial appearance on the surface and toroidal component ...
  • Torsion and gauge-invariant massive electrodynamics 
    de Sabbata, V; Sivaram, C; Garcia de Andrade, L (Springer, 1993-09)
    We study electrodynamics in Einstein-Cartan space-time, that is, in space-time with torsion, and show an analogy with the Chern-Simons gauge-invariant massive electrodynamics. In our case, however, there is no arbitrary ...
  • Torsion and inflation 
    Sivaram, C; De Sabbata, V (Springer, 1991-02)
    The effects of torsion in the early universe on the subsequent evolution are investigated theoretically. The focus is on the simple Einstein-Cartan generalization of conventional big-bang cosmology studied by de Sabbata ...
  • Torsion and massive electrodynamics in the early universe 
    Sivaram, C; de Andrade, L. C. G (Springer, 1994-06)
    A recent model based on massive electrodynamics in spaces with torsion gave rise to London type equations with Meissner-like effects and photon mass. This effective photon mass can be related to a time-varying torsion ...
  • Torsion and the cosmological constant problem 
    de Sabbata, V; Sivaram, C (Springer, 1990-03)
    A promising possibility which has yet to be considered with a view to furthering understanding of the cosmological constant problem is the use of torsion in a framework such as that of Einstein-Cartan theory: as would be ...
  • Torsion as the basis for string tension 
    de Sabbata, V; Sivaram, C (John Wiley & Sons, Inc., 1990-06)
  • Torsion effects in black hole evaporation 
    de Sabbata, V; Wang, D. X; Sivaram, C (1990)
  • Torsion effects on neutrino emission from dense collapsing cores 
    de Sabbata, V; Sivaram, C (1989)
    The authors consider the effects of torsion on the emission of neutrinos in a hot dense neutron medium and they explore the consequences for the case of SN 1987A neutrinos.
  • Torsion Modified Plasma Screening in Astrophysics 
    Sivaram, C; de Andrade, L. C. G (World Scientific Publishing Company, 2000-06)
    The torsion modified Maxwell–Proca equations when applied to describe a plasma is shown to lead to a correction to the Debye screening length. For hot new born neutron stars the torsion correction is shown to be significant. ...
  • Torsion quantum effects and the problem of cosmological constant 
    de Sabbata, V; Sivaram, C (Plenum Press, 1991)

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