IIA Institutional Repository: Recent submissions

  • Automation of dome rotation at 2.34m Vainu Bappu Telescope 
    Chinnappan, V; Faseehana (Astronomical Society of India, 1992)
  • The design and installation of the secondary mirror motor control for 2.34m Vainu Bappu Telescope 
    Chinnappan, V (Astronomical Society of India, 1992)
  • Facility: Vainu Bappu Telescope 
    Bhattacharyya, J. C; Rajan, K. T (Astronomical Society of India, 1992)
  • CCD photometry of the galactic open star clusters. I - King 10 
    Mohan, V; Pandey, A. K; Paliwal, D. C; Sagar, R; Mahra, H. S (Astronomical Society of India, 1992)
    CCD photometry of the open cluster King 10 has been carried out in the UBVRI photometric passbands down to V of about 19.5 mag. The reddening for the cluster region is found to be variable. A distance of 3.2 kpc has been ...
  • Production rate of H2O molecules as indicator of the surface temperature of cometary nucleus 
    Saxena, P. P; Misra, A (Astronomical Society of India, 1992)
    The technique outlined by Feynman (1963) to compute the number of molecules evaporating from a liquid surface has been extended to compute the sublimation rate of H2O molecules from the surface of a cometary nucleus and ...
  • Effect of mass segregation on mass function of young open clusters 
    Pandey, A. K; Mahra, H. S; Sagar, R (Astronomical Society of India, 1992)
    The effect of mass segregation on cluster mass function has been studied and it is found that the slope of the mass function is steeper in the outer part of the open clusters. Since derived dynamical relaxation time is ...
  • On the solar abundance of iron 
    Sinha, K; Sanwal, B. B (Astronomical Society of India, 1992)
    The MACKKL photospheric model and the latest oscillator strengths are used to obtain a solar abundance of iron close to the meteoritic value N(Fe) = 7.51 +/- 0.01. This helps to eliminate the discrepancy between photospheric ...
  • Astrophysical molecule S2 - Vibrational transition probability data 
    Anandaraj, R; Sankaralingam, T; Asokarajan, R; Rajamanickam, N (Astronomical Society of India, 1992)
    The study computes the Franck-Condon factors (vibrational transition probabilities) and r-centroids by the more reliable numerical integration procedure for the bands of C 3Sigma(u)(-) yields X 3Sigma(g)(-) and D3 Pi(u,r) ...
  • A possible scenario for the formation of the composite Large Magellanic Cloud star cluster NGC 2214 
    Bhatt, H. C; Sagar, R (Astronomical Society of India, 1992)
    The total masses and relaxation times for the two stellar populations (old and young) in the star cluster NGC 2214 are estimated. The total masses are found to be comparable. While the older population may be dynamically ...
  • Very high energy gamma-ray astronomy using atmospheric Cerenkov technique 
    Acharya, B. S (Astronomical Society of India, 1992)
    Research by Indian scientists in the field of very high energy gamma-ray astronomy using the Cerenkov technique is surveyed. A gamma-ray telescope set-up operating at Pachmarhi employing this technique is discussed
  • Astronomy with Buddhist stupas of Sanchi 
    Kameswara Rao, N (Astronomical Society of India, 1992)
  • Analysis of solar flare in CaII K on 1989 March 13 
    Joshi, A; Uddin, W (Astronomical Society of India, 1991)
    We report the CaII K observations of a major umbral solar flare of optical class 3B which occurred on 1989 March 13. Correlated optical, microwave, soft X-ray (SXR), sudden ionospheric disturbance observations and the ...
  • New approach for inclusion of the effect of gravity in magnetohydrostatic equilibrium in solar coronal arcades 
    Prasad, L; Chandra, S (Astronomical Society of India, 1992)
    The study presents a novel approach for the inclusion of the effect of gravity in the magnetohydrostatic equilibrium in coronal arcades, in which the magnetic lines of force are unaffected whereas the pressure isobars are ...
  • Can HeH(+) molecule be present in solar photosphere 
    Gaur, V. P; Joshi, G. C; Pande, M. C (Astronomical Society of India, 1992)
    The equivalent widths of the P and R branch lines of the fundamental vibration-rotation band arising from the ground state of HeH(+) have been calculated in a chosen photospheric model. The resulting equivalent widths ...
  • The most distant radio galaxies 
    Kapahi, V. K (Astronomical Society of India, 1992)
    The techniques and samples being employed to find radio galaxies at high redshifts are outlined. Results obtained from the study of high-redshift galaxies, as well as attempts to elucidate this phenomenon are discussed. ...
  • Solar granulation and speckle interferometry 
    Gupta, K. G; Pande, M. C (Astronomical Society of India, 1992)
    The status of various applications of speckle interferometry and imaging to the study of solar granulations as well as solar activity is reviewed. The physical aspects of solar granulations are examined, with emphasis on ...
  • Chemical evolution of the solar neighbourhood 
    Rana, N. C (Astronomical Society of India, 1992)
    The study presents a simple model of the chemical evolution of the solar neighborhood with reference to the evolution and frequency distribution of a particular element - iron. The history of star formation in the solar ...
  • Cosmology - Particle physics interface 
    Panchapakesan, N (Astronomical Society of India, 1992)
    Some of the areas of cosmology which have been activated by new developments in particle physics are reviewed. A brief review of the essential ideas of the big bang model and models of particle physics with spontaneously ...
  • Strengths and weaknesses of the big bang cosmology 
    Narlikar, J. V (Astronomical Society of India, 1992)
    The achievements and shortcomings of the standard hot big bang models of the universe are reviewed. The achievements lie in the predictions of the expanding universe, the abundances of light nuclei, and the MW background. ...
  • Galaxy formation 
    Padmanabhan, T; Subramanian, K (Astronomical Society of India, 1992)
    An attempt is made to develop a consistent theory describing galaxy formation. First, a discussion of the smooth universe is presented. The linear theory of perturbations is introduced, and its applications are described. ...

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