IIA Institutional Repository: Recent submissions

  • Notes for the Observer 
    Prabhu, T. P (Astronomical Society of India, 1982-06)
  • Franck-Condon factors for some abundant umbral molecules 
    Joshi, G. C; Joshi, U. C; Punetha, L. M; Pande, M. C (Astronomical Society of India, 1982-06)
    Some of the molecular transitions in UV in sunspots are pointed out and Franck-Condon factors for some of these have been calculated.
  • Phase difference between the two components of the solar cycle 
    Gokhale, M. H; Sivaraman, K. R (Astronomical Society of India, 1982-06)
    It is confirmed that near each solar minimum the latitude zone over which the small sunspot groups are distributed expands a few years before the expansion of the latitude zone of the large spot groups takes place. It is ...
  • Carbon monoxide and facula models 
    Tripathi, B. M; Pande, M. C; Sinha, K (Astronomical Society of India, 1982-06)
    Equivalent widths for a new lines of the first overtone band of carbon monoxide have been calculated in the solar infrared spectrum for five facular and two photospheric models. The calculations show a decrease in equilavent ...
  • New probable members of a galactic cluster in the direction of the Large Magellanic Cloud 
    Kilambi, G. C (Astronomical Society of India, 1982-06)
    A BV photographic photometric analysis has established magnitudes and colours for an additional 20 stars in the vicinity of Anon. Bok group. Of these, five are new probable members of the group. An age of 500 Myr is derived ...
  • The peculiar solar flare of 1981 May 13 
    Bondal, K. R; Pant, P; Pande, M. C; Ballabh, G. M (Astronomical Society of India, 1982-06)
    Time-phase photographic observations with 0.7 Armstrong passband H-alpha filter and the morphological-cum-temporal behaviour of a large double solar flare which occurred on 1981 May 13 have been described. The two strands, ...
  • Secular period changes in ten eclipsing binaries 
    Panchatsaram, T; Abhyankar, K. D (Astronomical Society of India, 1982-06)
    The photoelectric times of minima, available for the eclipsing binaries KO Aql, V566 Oph, AH Vir, AG Vir, 44i Boo B, RT And , SV Cam, Tv Cas, AT Lac and U Peg have been analysed to study their orbital periods. KO Aqi, V566 ...
  • Planetary nebulae 
    Mallik, D. C. V (Astronomical Society of India, 1982-06)
    Recent research on planetary nebulae is reviewed, with special emphasis on ultraviolet and infrared observations. Various distance scales and statistics based on them are discussed and the emperical mass-radius relation ...
  • Notes for the Observer 
    Prabhu, T. P (Astronomical Society of India, 1982-03)
  • On the estimation of the amount of heating for solar coronal loops 
    Chandra, Suresh; Narain, Udit (Astronomical Society of India, 1982-03)
    In the present investigation the amount of heating for some coronal magnetic loops and kernels has been investigated in a general way in line-dipole and point-dipole geometries. This investigation differs from that of ...
  • The moon illusion 
    Devadas, P (Astronomical Society of India, 1982-03)
    The phenomenon of the enlarged appearance of the sun and the moon at the horizon is attributed to the long distance realized by the vision with the help of a perspective view. The shrunken view of these objects when overhead ...
  • Multi-station observations of interplanetary scintillations 
    Ananthakrishnan, S; Kaufman, J. J (Astronomical Society of India, 1982-03)
    Solar wind velocity estimation using the method of multi-station interplanetary scintillation observations has been reviewed. It is shown that the interred model for the electron density fluctuations in the solar wind ...
  • Noter for the Observer 
    Prabhu, T. P (Astronomical Society of India, 1981-12)
  • 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 ...
  • Optical colours and polarization of a model reflection nebula IV. Mixture of grains in the case of the star within the nebula 
    Shah, G. A (Astronomical Society of India, 1981-12)
    The UBV colour differences and polarization that can be caused by mixtures of interstellar grains in a model reflection nebula have been presented. The geometrical configuration of the nebula is adapted in the form of a ...
  • Magneto-ionic conditions and energetics of simultaneous solar microwave bursts at 2.8, 10 and 19.3 GHz on 1980 June 4 
    Degaonkar, S. S; Alurkar, S. K; Bhonsle, R. V; Calla, O. P. N; Lokanadham, B (Astronomical Society of India, 1981-12)
    Simultaneous microwave bursts were observed at 2.8 and 19.3 GHz at Ahmedabad and at 10 GHz at Hyderabad on 1980 June 4. The peak of the burst occurred at 0836, 0838 and 0840 UT at 19.3, 10 and 2.8 GHz respectively, showing ...
  • Brackett-gamma line and facula models 
    Tripathi, B. M; Pande, M. C (Astronomical Society of India, 1981-12)
    An attempt has been made to show that the profile of the Brackett-gamma line can distinguish between different facula models. It is suggested that low noise high resolution scans of Brackett lines can help improve the ...
  • An estimation of the amount of heating in solar coronal loops II. Cooling through conduction-driven evaporation 
    Narian, Udit (Astronomical Society of India, 1981-12)
    In this paper a theory of cooling of solar coronal loops through conduction driven evaporation in presence of a source of heating is presented. No attempt has been made to specify the nature of the source. The theory has ...
  • Proposal for an international institute for space sciences and electronics and for a giant equatorial radio telescope as a collaborative effort of the developing countries 
    Swarup, G (Astronomical Society of India, 1981-12)
    It is proposed to construct a 2 km long and 50 m wide cylindrical radio telescope at a site close to the earth's equator. By placing the long axis of the cylinder in the north-south direction at the equator, its axis of ...
  • Escape velocities of interacting spherical galaxies 
    Sastry, Shankara. K; Alladin, S. M (Astronomical Society of India, 1981-09)
    The dependence of the escape velocity of a pair of interacting identical spherical galaxies on their separation is studied using polyropic models for the galaxies. It is found that if the escape (parabolic) velocity of the ...

Search DSpace

Browse

My Account