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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • Torsion, massive electrodynamics and primordial magnetic fields in the Early Universe 
    de Andrade, L. C. G; Sivaram, C (Springer, 1993)
    A recent model of torsion-modified electrodynamics which breaks the electromagnetic conformal invariance is shown to lead to the generation of magnetic fields in the Early Universe.
  • Torsion, minimum time, string tension and its physical implications in cosmology 
    de Sabbata, Venzo; Sivaram, C (Springer, 1992-01)
    By introducing torsion in general relativity - that is physically considering the effect of the spin and linking the torsion to defects in the space-time topology - a minimum unit of time can be obtained. In this context ...
  • Torsion, string tension, and topological origin of charge and mass 
    de Sabbata, V; Sivaram, C (Springer, 1995-08)
    We consider the analogy between torsion line defects and vortex lines in a superconductor to suggest that the electric charge and masses of elementary particles may have a geometrical origin. Just as the field vanishes ...
  • Torsion, time and temperature (The T/sup3 theorem) 
    de Sabbata, V; Sivaram, C (Allahabad Mathematical Society, 1991-06)
  • Torsion, wormholes, and the problem of the Cosmological constant 
    de Sabbata, V; Sivaram, C (Springer, 1991-02)
    We consider the effect of torsion in the early universe to see if it is possible to explain the small value (if not zero) of the Cosmological constant at the present time. For the gauge-theoretic formulation of the ...
  • Torsional MHD Oscillations of the Sun 
    Hiremath, K. M; Gokhale, M. H (The Korean Astronomical Society, 1996-12)
    Assuming that the solar activity and the solar cycle phenomena may be manifestations of global torsional MHD oscillations, we compute the Alfven wave travel times along the field lines in the five models of magnetic field ...
  • Total electron concentration of the ionosphere over the magnetic equator 
    Rastogi, R. G; Iyer, K. N; Bhattacharyya, J. C (Indian Academy of Sciences, 1975-08)
  • Total electron content and F-region electron density distribution near the magnetic equator in India 
    Rastogi, R. G; Sethia, G; Chandra, H; Deshpande, M. R; Davies, K; Murthy, B. S (Pergamon Press, 1979-06)
    Total electron content derived from the group delay measurements of ATS-6 radio beacons received at Ootacamund (India) are compared with the electron-density vs height distributions derived from the ionosonde data of the ...
  • Total electron content of the equatorial ionosphere 
    Rastogi, R. G; Sharma, R. P; Shodhan, V (Pergamon Press, 1973-05)
    Total electron content (Nt) variations in the ionosphere above the magnetic equator (Thumba dip 0.6°S) obtained by the Faraday rotation measurements of beacon signals from S66 satellites are described for the period December ...
  • The total solar eclipse in the Bhagavata: its depiction in words and in images 
    Kapoor, R. C (Centre for Astronomy Research & Development, 2021-12)
    There is reference to a total solar eclipse over Kurukshetra in an ancient Indian text, the Srimadbhagvata (also the Bhagavata). The occasion drew not just Lord Krsṇa, his brother Balarama and their clan from Dwarka, but ...
  • Total solar eclipse observations MiG-25 at 80,000 ft 
    Bhatnagar, A; Mukerji, S; Babu, Y. S; Sehgal, N. K; Kamble, V. B; Pandya, R. P; Pandya, N. P; Bhavsar, K. M; Prajapati, R. P (Indian Institute of Astrophysics, 1997)
    The objective of this project was to take intensity and polarization measurements of extended solar coronal streamers, from a height of 75,000 to 80,000 feet above the ground. Hitherto, no observations have been made of ...
  • Total solar eclipse of February 16, 1980. 
    Bhattacharyya, J. C (Indian Academy of Sciences, 1980)
  • Total solar eclipse-October 1995 
    Bhattacharyya, J. C (Indian Academy of Sciences, 1995-09)
  • Total solar eclipses of 1994 and 1995 
    Singh, J (Astronomical Society of India, 1994-09)
  • Toward a revival of stellar intensity interferometry 
    LeBohec, S; Barbieri, C; Willem-Jan, de W; Dravins, D; Feautrier, P; Foellmi, C dric; Glindemann, A; Hall, J; Holder, J; Holmes, R; Kervella, P; Kieda, D; Le Coarer, E; Lipson, S; Malbet, F; More, S. B; Nu ez, P; Ofir, A; Ribak, E; Saha, S. K; Schoeller, M; Zhilyaev, B; Zinnecker, H (SPIE The International Society for Optical Engineering, 2008)
    Building on technological developments over the last 35 years, intensity interferometry now appears a feasible option by which to achieve diffraction-limited imaging over a square-kilometer synthetic aperture. Upcoming ...
  • Toward precision radial velocity measurements using Echelle spectrograph at VainuBappu Telescope 
    Chamarthi, Sireesha; Banyal, R. K; Sriram, S (SPIE-The International Society for Optical Engineering, 2019-04)
    The Echelle spectrograph operating at Vainu Bappu Telescope is a general purpose instrument designed for high-resolution spectroscopy. It is being considered for precision Doppler measurements without altering the existing ...
  • Towards a unification of the parameters underlying elementary particles and cosmology 
    Sivaram, C (Springer, 1982-12)
    It is pointed out that the gross parameters characterizing the universe such as the overall size and mass can be arrived at from microphysical considerations involving the fundamental interactions of elementary particle ...
  • Towards Gender Equity in Indian Astronomy 
    Beri, Aru; Shastri, Prajval; Banyal, R. K; Chatterjee, Debarati; Chatterjee, Ritaban; Jassal, Harvinder; Kanekar, Nissim; Kharb, Preeti; Misra, Kuntal (2023-11)
    The Working Group for Gender Equity (WGGE) was formally constituted under the Astronomical Society of India (ASI) in 2015 to increase awareness about gender-related issues in the astrophysics community. The current ...
  • Towards gender equity in physics in India: initiatives, investigations, and questions 
    Shastri, P; Kurup, A; Resmi, L; Ramaswamy, R; Ubale, S; Bagchi, S; Rao, S; Narasimhan, S (AIP Publishing, 2015-12)
    Initiatives towards gender parity in the sciences in India have occurred both at national, governmental levels and at local, institutional levels. A gender gap persists in physics, but data suggest that ...
  • Towards Low Cost turbulence generator for AO testing: Utility, control and stability 
    Roopashree, M. B; Vyas, A; Krishnan, S. M; Sriram, R; Siva Shankar Sai, S; Prasad, B. R (Optical Society of America, 2011-07)
    We demonstrate and characterize an effective, statistically repeatable atmospheric turbulence generator with the aim of testing a 2m class telescope adaptive optics system in a cost effective manner.

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