IIAP Publications: Recent submissions

  • Relativistic star clusters with large central redshifts 
    Das, P. K (The Royal Astronomical Society, 1984-10)
    Previous calculations of the velocity distribution function for a star cluster scenario of a class of core-envelope type static, stable, massive equilibrium configurations, capable of giving high internal gravitational ...
  • On the dynamical evolution of a spheroidal cluster 
    Sunder, G. S; Kochhar, R. K (The Royal Astronomical Society, 1985-03)
    Tensor virial equations are used to investigate the dynamical evolution of a cluster of mass points characterized by a spheroidal (homogeneous or heterogeneous) distribution of matter and an isotropic distribution of ...
  • Possible Detection of a Ring System in Saturn's Magnetosphere 
    Vasundhara, R; Bhattacharyya, J. C; Santhanam, P; Pande, A. K; Mohan, V; Mahra, H (Nature Publishing Group, 1984-12)
    The region of the magnetosphere of Saturn around 14 radii and 19 radii has been of special interest since the detection of anomalous dips in the low-energy plasma ion-density in these regions by the Voyager 1, Voyager 2 ...
  • Brightness, polarization and electron density of the solar corona of 1980 February 16 
    Sivaraman, K. R; Jayachandran, M; Scaria, K. K; Babu, G. S. D; Bagare, S. P; Jayarajan, A. P (Indian Academy of Sciences, 1984-06)
    During the eclipse of 1980 February 16 the authors photographed the solar corona at an effective wavelength of 6300 Å. Using a quadruple camera coronal pictures were obtained in polarized light for four polaroid orientations. ...
  • Fast electron generation in quasiperpendicular shocks and type II solar radiobursts 
    Krasnoselskikh, V. V; Kruchina, E. N; Volokitin, A. S; Thejappa, G (European Southern Observatory, 1985-08)
    The paper is devoted to the theory of type II solar radio bursts caused by collisionless shock waves propagating in the coronal plasma. The model developed is based on the theory of collisionless shock waves, which predicts ...
  • VLA observations of extreme hydrogen deficient stars 
    Kameswara Rao, N; Venugopal, V. R; Patnaik, A (Indian Academy of Sciences, 1985-09)
    Observations at 2 and 6 cm have been obtained for six hydrogen-deficient stars R CrB, HD 160641, BD -9 deg 4395, V 348 Sgr, MV Sgr, and Upsilon Sgr by means of the National Radio Astronomy Observatory's Very Large Array ...
  • Morphology of the bipolar planetary nebula NGC 2346 from emission line profile studies 
    Anandarao, B. G; Banerjee, D. P. K; Desai, J. N; Jain, S. K; Mallik, D. C. V (Royal Astronomical Society, 1988-11)
    High resolution observations of H-alpha 6563-A, forbidden O-III 5007 A, and forbidden N-II 6583-A emission lines in the bipolar planetary nebula NGC 2346 are presented. From the widths of the alpha and forbidden N-II lines, ...
  • Astrophysical consequences of n-nmacr oscillations - (Reply) 
    Sivaram, C; Krishan, V (Nature Publishing Group, 1984-06)
  • Patchy occurrence of equatorial spread-F 
    Sastri, J. H (European Geosciences Union, 1985-10)
    From a statistical analysis of ionogram data of Kodaikanal (dip 3.5 deg N) it is shown that, during years of high sunspot activity, the discontinuous or patchy occurrence of equatorial spread-F (ESF) depends on season. ...
  • A probable initial configuration of a flaring loop 
    Krishan, V (Institute of Physics, 1986-02)
    A clue to the preflare configuration of a magnetic loop is obtained based on Taylor's hypothesis that the decay of energy to a minimum with magnetic helicity remaining constant leads to a force free state. The numerical ...
  • Sun as a star - Rotation rates from the CA K-index 
    Singh, J; Livingston, W. C (Kluwer Academic Publishers, 1987-09)
    Daily measurements for 18 months made at Tucson of the Ca K-index in integrated sunlight have been used to derive solar rotation rates. Power spectral analysis shows that one can obtain a well defined value of solar rotation ...
  • Influence of variable permeability on combined free and forced convection about inclined surfaces in porous media 
    Chandrasekhara, B. C; Namboodiri, P. M. S (Elsevier, 1985-01)
    The analysis is carried out for mixed convection about inclined surfaces in a saturated porous media incorporating the variation of permeability and thermal conductivity due to packing of particles. Similarity solutions ...
  • Observations of the giant H II region complex W51 at decameter wavelengths 
    Deshpande, A. A; Sastry, Ch. V (European Southern Observatory, 1986-05)
    Radio continuum absorption observations at 34.5 MHz with a spatial resolution of 34 x 48 arcmin have been obtained for the giant H II region complex W 51 with the decameter-wave radio telescope at Gauribidanur, India (13 ...
  • CA II K bright points and the solar cycle 
    Sivaraman, K. R (Springer, 1984-09)
    We have made number counts of the bright points that populate the interior of the Ca II network in the solar chromosphere for four solar cycles. We find that the number of these fine structures during the solar maximum ...
  • Yields of nucleosynthesis from massive and intermediate mass stars and constraints on their final evolution 
    Mallik, D. C. V; Mallik, S. G. V (Indian Academy of Sciences, 1985-09)
    Nucleosynthetic yields and production rates of He and heavy elements are derived using recent revisions in O star counts and the stellar models of Maeder (1981). The current production rates and yields are significantly ...
  • Polarization line radiative transfer in the atmospheres of magnetic white dwarfs 
    Nagendra, K. N (Akademie verlag GmbH, 1987)
    Some physical mechanisms which can affect the Zeeman line profiles of magnetic white dwarfs are studied. The pure absorption polarization transfer equation is solved including these mechanisms. The broadening of lines in ...
  • Study of Longperiod Global Oscillations of Sun Through Spherical Harmonic Fourier Analysis of Sunspot Activity 
    Gokhale, M. H (International Astronomical Union, 1988)
    A spherical harmonic Fourier analysis of the maximum areas of sunspot groups listed in Ledgers I and II of Greenwich photoheliographic results for 1933 - 1954 yield significant peaks at the 11 y periodicity for some spherical ...
  • Role of equatorial ionization anomaly in the initiation of equatorial spread F 
    Raghavarao, R; Nageswararao, M; Sastri, J. H; Vyas, G. D; Sriramarao, M (American Geophysical Union., 1988-06)
    A comparative study is made of the changes in the latitudinal structure of the F region electron density at fixed altitudes in the Indian equatorial region on days with and without postsunset onset of equatorial spread F, ...
  • Improved virtual orbital multireference Møller–Plesset study of the ground and excited electronic states of protonated acetylene, C2H 
    Chaudhuri, R. K; Feed, K. F (American Institute of Physics, 2008-08-07)
    The ground state geometries and associated normal mode frequencies of the classical and nonclassical protonated acetylene ion, i.e., the vinyl cation C2H, are computed using the complete active space self-consistent field ...
  • The far-infrared (IRAS) excess in luminous F-G stars 
    Pottasch, S. R; Parthasarathy, M (European Southern Observatory, 1988-03)
    The far-infrared IRAS excesses are found in ten luminous F-G stars. The far-IR fluxes from these stars are due to large amounts of dust around them. The far-IR flux distribution, far-IR luminosities and dust masses are ...

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