IIA Institutional Repository

Browsing by Author "Ramadurai, S"

Browsing by Author "Ramadurai, S"

Sort by: Order: Results:

  • Ramadurai, S (Indian Institute of Astrophysics, Bangalore, 1986)
    The various observational features of the 3He rich solar flares like their characteristics and association with other phenomena are discussed. It is shown that 3He rich flares split into two distinct groups, if one plots ...
  • Ramadurai, S (Indian Institute of Astrophysics, 1988)
  • Ramadurai, S (Astronomical Society of India, 1975-09)
  • Ramadurai, S; Hoyle, F; Wickramasinghe, N. C (Astronomical Society of India, 1993)
    The paucity of kinetic data for the operation of Fischer-Tropsch Type (FTT) reactions, at the appropriate conditions for the primitive solar nebula, is highlighted. The observed isotopic abundances of D, C-13 and N-15 in ...
  • Indulekha, K; Vijayagovindan, G. V; Ramadurai, S (Astronomical Society of India, 2003)
    We investigate the time scale for the dissipative collapse of a spherical cluster of gas clouds by supplementing the scalar virial equation with an evolution equation for the energy. We find that collapse times are more ...
  • Krishan, V; Wiita, P. J; Ramadurai, S (European Southern Observatory, 2000-04)
    We show that a certain class of flare models for variability from accretion disk coronae are subject to beam-plasma instabilities. These instabilities can prevent significant direct acceleration and greatly reduce the ...
  • Ramadurai, S (Astronomical Society of India, 1974-03)
  • Ramadurai, S (Astronomical Society of India, 1993)
    The complete 150 kyr record of Be-10 concentration in the Vostok ice core in Antarctica displays several steep and relatively brief increases. Out of these, the increase at approximately 33 Kyr is unique, as this is not ...
  • Ramadurai, S; Indulekha, K (Astronomical Society of India, 1996)
  • Krishan, V; Ramadurai, S (Astronomical Society of Indian, 1988-03)
    The space missions to comet Halley have reported an increase of the magnetic field from (12-15) x 10 to the -5th gauss, characteristic of the interplanetary solar wind, to a peak field strength of (70-80) x 10 to the -5th ...
  • Krishan, V; Ramadurai, S; Wiita, P. J (The European Southern Observatory, 2003-02)
    We have investigated the phenomenon of explosive chromospheric evaporation from an accretion disk as a mechanism for fast variability in accreting sources such as low mass X-ray binaries and active galactic nuclei. This ...
  • Ramadurai, S (Astronomical Society of India, 1977-12)
  • Ramadurai, S (Astronomical Society of India, 1975-03)
  • Ramadurai, S; Schramm, D. N (Astronomical Society of India, 1993)
    The detection of neutrinos from SN1987a has revived the interest in neutrino induced nucleosynthesis. In this work various results on the neutrino produced abundances of several isotopes are summarized and compared with ...
  • Ramadurai, S; Wiita, Paul J (Indian Institute of Astrophysics, 1988)
    The possible evolutionary effects of rotation on the observational characteristics of SN 1987A and it progenitor Sk -69 202, are explored. If rotation is important, decrease in post main sequence luminosity and increase ...
  • Ramadurai, S (Astronomical Society of India, 1986-12)
    The evidence for the triggering of star formation by shocks from expanding supernova shells is examined with special emphasis on the solar system. It is shown that the recently discovered isotopic anomalies, mainly in Ti, ...
  • Goswami, A; Ramadurai, S; Duorah, H. L (Springer Netherlands, 1992-02)
    The synthesis of Al-26 during combined hydrogen and helium-burning processes in high temperature and density conditions is studied. The possible sites for these processes are believed to be the neutron star surfaces where ...

Search DSpace

Browse

My Account