IIA Institutional Repository

Browsing by Subject "Universe"

Browsing by Subject "Universe"

Sort by: Order: Results:

  • The Absorption of light in reference to the infinity of the Universe 
    Ridsdale, A. C (Astronomical Society of India, 1916)
  • At what energy does gravity unite with grand unified theories in the early universe? 
    Sivaram, C (Springer, 1987-12)
    Unification of gravity with GUTs is usually expected at the Planck energy E pl≈10/sup19 GeV. However, the vastly different values of the two couplings at E Pl ( α GUT« 1, α grav≈ 1) would make such unity (at E Pl) implausible ...
  • Clustering of galaxies by inverse cascade in a turbulent medium 
    Krishan, V; Sivaram, C (Royal Astronomical Society, 1991-05)
    A definite physical mechanism based in inverse cascading is suggested which quite naturally yields a bottom-up hierarchical structure for galactic clustering. In this mechanism, nonlinear interactions between small fluid ...
  • Cosmic background temperature and the coupling constants of fundamental interactions 
    Sivaram, C (Kluwer Academic Publishers, 1993-08)
    The underlying links between the coupling constants of the fundamental interactions and cosmological parameters explored earlier is shown to give rise to a definite value for the cosmic background temperature.
  • A cosmological prediction from the coupling constants of fundamental interactions 
    Sivaram, C (Springer, 1986-07)
    The notion of gravitational charge is used to suggest a link in the Machian sense between fundamental interactions and cosmology. The observed values of the coupling constants of these interactions then give a definite ...
  • Dark matter of our vast Universe 
    Sivaram, C (Deccan Herald, 2009-03-24)
  • Evolution of the Universe through the Planck epoch 
    Sivaram, C (Springer, 1986-08)
    The problem of the Universe emerging out of the Planck epoch is discussed. It is pointed out that an earlier exponential expansion phase well before the onset of the GUTs phase transition is essential. Such an expansion ...
  • Fundamental interactions in the early universe 
    Sivaram, C (Springer, 1994-12)
    A unified approach to fundamental interactions as explored earlier is further elaborated and its consequences for the early universe studied especially in connection with the energy dependence of the coupling constants.
  • Fundamental interactions in the early universe 
    Sivaram, C (Springer, 1994-05)
    A unified approach to fundamental interactions as explored earlier is further elaborated and its consequences for the early universe studied especially in connection with the energy dependence of the coupling constants.
  • A general upper limit on the mass and entropy production of a cluster of supermassive objects 
    Sivaram, C (Springer, 1982-09)
    A general upper limit is obtained on the mass of a cluster of pregalactic supermassive stars, along with the entropy of the radiation they produce, in view of the suggestion that they account for some or even all of the ...
  • Mond, dark matter and the cosmological constant 
    Sivaram, C (Springer, 1994-09)
    A possible connection between MOND (Modification of Newtonian Dynamics) proposed as an alternative hypothesis to dark matter in galaxies and clusters and a residual cosmological constant term dominating cosmological dynamics ...
  • The need for an energy-dependent torsion-coupling constant in the early universe 
    de Sabbata, V; Sivaram, C (Springer, 1989-08)
    The torsion-coupling constant (which depends on energy as E exp -2) can pass through the values of the coupling constants of the other interactions during the evolution of the universe. An energy-dependent torsion-coupling ...
  • Non-zero rest mass neutrinos and the cosmological constant 
    Sivaram, C (Kluwer Academic Publisher, 1985-11)
    Recently it was pointed out that a non-zero cosmological constant can play a role in the formation of neutrino halos only in the case of neutrinos of very low rest mass (mν ≤ 0.1 eV). However, phase-space considerations ...
  • Non-zero rest mass neutrinos and the cosmological constant 
    Sivaram, C (Kluwer Academic Publishers, 1985-11)
    Recently it was pointed out that a non-zero cosmological constant can play a role in the formation of neutrino halos only in the case of neutrinos of very low rest mass (mν ≤ 0.1 eV). However, phase-space considerations ...
  • Nonlinear curvature Lagrangians and extended inflation in the early universe 
    Sivaram, C; Campanelli, M (Springer, 1992-08)
    Theories with Lagrangians nonlinear in the curvature scalar can be reduced by appropriate transformations to a form similar to the Brans-Dicke model. This may enable us to have extended inflation in the early universe ...
  • On structure formation in the universe 
    Satya Narayanan, A (Springer, 1994-12)
    The formation of structures in the universe is one of the most challenging problems of cosmology. In this paper, an attempt to explain the formation of galaxies through the generation of vortices (with dissipation) in an ...
  • The planck length as a cosmological constraint 
    Sivaram, C (Springer, 1986-11)
    Any attempt at unification of gravity with quantum physics inevitably leads to the Planck length, usually interpreted as defining the distance scale at which quantum corrections to general relativity are expected to become ...
  • Role of plasma processes in astrophysics 
    Krishan, V (The Royal Swedish Academy of Sciences, 1994)
    The universe is made up of plasmas and fluids. The plasma phenomena exhibits itself through electromagnetic processes and the fluid through configurational processes. I shall try to illustrate both these aspects by taking ...
  • Scale transformations and evolution of the early universe 
    Sivaram, C (Springer, 1993-09)
    The notion of discrete scale transformations is invoked to suggest strong links between fundamental interactions and cosmology giving rise to a hierarchy of cosmic scales.
  • String tension and fundamental constants in the early universe 
    Sivaram, C (Springer, 1990-05)
    An energy-dependent string tension could be connected to the fundamental physical and coupling constants. The role of Weyl gravity for sub-Planckian as well as macroscopic domains is explored and the existence of a hierarchy ...

Search DSpace

Browse

My Account