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Browsing Publications of Astronomical Society of India by Title

Browsing Publications of Astronomical Society of India by Title

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  • Sun : a laboratory source 
    Sinha, K (Astronomical Society of India, 1998)
    We summerise here some of the recent advances in deriving molecular and atomic parameters using the high resolution spectra of the sun
  • Sunspot continuum from 1 to 10 mum and the umbral temperature models 
    Punetha, L. M; Joshi, G. C (Astronomical Society of India, 1984-09)
    Infrared flux in Zwaan`s (1974) and Boyer`s (1980) sunspot models has been calculated in the wavelength range 1 to 10 mu m, taking into account the molecular line haze opacity (Joshi et al. 1979). The calculations are ...
  • Supernova 1987A - A review 
    Bhattacharya, D (Astronomical Society of Indian, 1988)
    Supernova 1987A, the first supernova since the time of Kepler to reach naked-eye visibility, was discovered on February 24, 1987, in the Large Magellanic Cloud. This has naturally been of great interest to astronomers. The ...
  • 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, ...
  • Supernova Remnants 
    Velusamy, T (Astronomical Society of India, 1974-12)
  • Supernova remnants: GMRT based results 
    Bhatnagar, S (Astronomical Society of India, 2001)
  • Surface compositional changes observed during last stages of stellar evolution 
    Giridhar, S (Astronomical Society of India, 1999)
  • Surface effects on the solar oscillation frequencies 
    Narasimha, D (Astronomical Society of India, 1996)
    The solar p-mode frequencies and eigenfunctions are modified by four processes operative in the atmosphere and the subphotospheric layers which can be, to a good approximation, treated as surface phenomena; they are the ...
  • Surface photometry of ellipticals: Radio and cluster galaxies 
    Singh, K. P; Bhat, P. N; Prabhu, T. P; Kembhavi, A. K (Astronomical Society of India, 1993)
    Broad-band surface photometry in V, R and I colors is presented for three elliptical galaxies immersed in hot intracluster gas emitting X-rays due to thermal bremsstrahlung. The galaxies are (1) a cD galaxy, and (2) a radio ...
  • Surface photometry of galaxies 
    Kembhavi, A (Astronomical Society of India, 1995-09)
  • Surface photometry of three Wolf-Rayet galaxies 
    Singh, M; Sanwal, B. B; Stalin, C. S (Astronomical Society of India, 2001)
    CCD photometric observations of the Wolf-Rayet galaxies NGC 1741, IIZw40 and IRAS 01003-2238 were taken with 104 cm telescope of the U.P. State Observatory NainiTal using 1024 x 1024 CCD camera in B V R I and H? filters. ...
  • Surface waves in a two layered fluid model with an inclined magnetic field 
    Satya Narayanan, A (Astronomical Society of India, 1996)
    We consider a simple two layer fluid model to investigate surface waves arising due to the interaction between two fluids of different densities. The interface separates the convection zone and the atmosphere of the Sun. ...
  • Surge activities on November 26-28, 1990 
    Uddin, W; Verma, V. K (Astronomical Society of India, 2000)
    We report here a study of 8 solar surges observed in H? emission on the west solar limb (active region NOAA 6368) on 26, 27 and 28 November 1990. Three surges were observed on 26 November of durations 35, 86 and 40 min at ...
  • Surge prominence of 1981 November 19 
    Verma, V. K; Pande, M. C (Astronomical Society of India, 1982-09)
    Time-lapse photographic observations with 0.7 Armstrong passband H-alpha filter and the morphological behaviour of the surge prominence recorded on 1981 Novermber 19 have been described. The surge was recorded both in the ...
  • Survey for roAp stars in the northern sky from Naini Tal 
    Ashoka, B. N; Seetha, S; Raj, E; Chaubey, U. S; Gupta, S. K; Joshi, S; Martinez, P; Kurtz, D. W; Sagar, R; Kasturirangan, K (Astronomical Society of India, 2000)
    Of the 31 known rapidly oscillating Ap (roAp) stars, 28 are in the southern sky and majority of them were discovered at SAAO indicating that a systematic survey also is needed in the northern sky. Therefore, a project has ...
  • A Survey of the Solar Atmospheric Models 
    Abhyankar, K. D (Astronomical Society of India, 1977-06)
  • SW Lacertae - A quadruple system 
    Panchatsaram, T; Abhyankar, K. D (Astronomical Society of India, 1981-03)
    Orbital period study using photoelectric times of minima of SW Lac revelas that the period change is caused by the orbital motion of a triple system around a fourth body. The orbital periods of the third and the fourth ...
  • Swing amplification in stars and gas: Origin of local spirit structure in galaxies 
    Jog, C. J (Astronomical Society of India, 1993)
    We present a study of the growth of local, non-axisymmetric perturbations in gravitationally coupled stars and gas in differentially rotating galactic disk. The amplified perturbations in stars and gas constitute trailing, ...
  • Symposium on "Some Aspects of Astrophysics" 
    Varma, R. K (Astronomical Society of India, 1974-12)
  • Synchronization in binary stars 
    Rajamohan, R; Venkatakrishnan, P (Astronomical Society of India, 1981-12)
    Radiative dissipation of the dynamical tide is found to be inadequate in explaining the observed synchronization between orbital and rotational motions of the main sequence components of early-type binary stars. The ...

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