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Browsing by Author "Ramadurai, S"

Browsing by Author "Ramadurai, S"

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  • Geminga as a cosmic ray source 
    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 ...
  • Magnetic braking and low specific angular momenta of elliptical galaxies 
    Ramadurai, S; Indulekha, K (Astronomical Society of India, 1996)
  • Magnetic field and the ionic tail of comet Halley 
    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 ...
  • Microflares in accretion disks 
    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 ...
  • NATO Advanced Study Institute on Energy Sources and Emission Mechanisms of Quasars 
    Ramadurai, S (Astronomical Society of India, 1977-12)
  • Neutral Currents in Astrophysics 
    Ramadurai, S (Astronomical Society of India, 1975-03)
  • Neutrino induced nucleosynthesis 
    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 ...
  • Rotational Effects in SN 1987A 
    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 ...
  • Supernova induced star formation 
    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, ...
  • The synthesis of Al-26 during combined hydrogen and helium-burning reactions 
    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 ...

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