IIAP Publications: Recent submissions

  • Optical colours and polarization of a model reflection nebula. I. Star behind the nebula 
    Shah, G. A (Indian Academy of Sciences, 1974)
    Simple models of a reflection nebula in the form of a plane-parallel slab containing smooth spherical solid particles in submicron size range have been considered. Single scattering has been assumed. The effect of varying ...
  • Do hydrogen-deficient carbon stars have winds? 
    Geballe, T. R; Kameswara Rao, N; Clayton, G. C (Institute of Physics, 2009-06)
    We present high resolution spectra of the five known hydrogen-deficient carbon (HdC) stars in the vicinity of the 10830 Å line of neutral helium. In R Coronae Borealis (RCB) stars the He I line is known to be strong and ...
  • Search for short-term periodicities in the sun's surface rotation: a revisit 
    Javaraiah, J; Ulrich, R. K; Bertello, L; Boyden, J. E (Springer Netherlands, 2009-06)
    We have used the daily values of the equatorial rotation rate determined from the Mt. Wilson daily Doppler-velocity measurements during the period 3 December 1985 – 5 March 2007 to search for periodicities in the solar ...
  • Council report on solar activity in 1938: Prominences 
    Narayan, A. L (Royal Astronomical Society, 1939-02)
  • Ground-based optical astronomy in India 
    Parthasarathy, M (National Astronomical Observatory, 1996)
  • The ultraviolet band systems of Bal molecule 
    Rao, M. L. P; Rao, D. V. K; Rao, P. T; Murthy, P. S (1977)
    The emission spectrum of the Bal molecule is excited in a R.F. discharge and photographed in the first order (reciprocal dispersion: 1.25 Å/mm) of a 21 ft. concave grating spectrograph. A comprehensive new vibrational ...
  • Dynamics of ejection from galaxies and the variable mass hypothesis 
    Narlikar, J. V; Vishwakarma, R. G; Banerjee, S. K; Das, P. K; Arp, H. C; Sato, K (World Scientific Publishing Company, 2002)
    Increasing numbers of active galaxies with significant alignments of quasars are being observed. It is the purpose of this paper to explore ejection dynamics of these quasars using the variable mass hypothesis (VMH) ...
  • The electronic band spectrum of Cal in the red region 
    Rao, M. L. P; Rao, D. V. K; Rao, P. T; Murthy, P. S (Polish Academy of Sciences, 1978-02)
  • Probable wavelengths and relative intensities of MgO infrared bands 
    Murty, P. S (American Geophysical Union, 1978-09)
    The need for experimental data on some of the spectroscopic properties of MgO which may be useful during a further search for MgO in the lower E region of the ionosphere is emphasized. Predicted relative intensities of the ...
  • Total electron content of the equatorial ionosphere 
    Rastogi, R. G; Sharma, R. P; Shodhan, V (Pergamon Press, 1973-05)
    Total electron content (Nt) variations in the ionosphere above the magnetic equator (Thumba dip 0.6°S) obtained by the Faraday rotation measurements of beacon signals from S66 satellites are described for the period December ...
  • Optical astronomy in India - prospects of the next decade 
    Bappu, M. K. V (Indian Academy of Sciences, 1972-12)
  • Planetary nebulae and nitrogen enrichment in the galaxy 
    Mallik, D. C. V (Geneva Observatory, 1978)
    The extent of nitrogen enrichment of the interstellar gas by planetary-nebula formation is evaluated, and the nitrogen and oxygen abundance gradients in the disk of the Galaxy are derived on the basis of a simple model for ...
  • Nighttime Pi2 micropulsations at Kodaikanal 
    Sastri, J. H; Murthy, B. S (National Institute of Science Communication And Information Resources, 1975-09)
  • Geomagnetic solar flare effect in the dark hemisphere 
    Sastri, J. H (National Institute of Science Communication And Information Resources, 1975-09)
    Normal run magnetogram data obtained at Huancayo, Kodaikanal and Kakioka show that the geomagnetic solar flare effect (SFE or Crochet) occurs not only in the sunlit hemisphere but also in the dark hemisphere. Using a ...
  • A phenomenological, kinematical model of the coronal magnetic fields in terms of thin flux tubes rising from the photosphere 
    Gokhale, M. H; Venkatakrishnan, P (Indian Academy of Sciences, 1978-11)
    A kinematical model is necessary for understanding the gross structure of the coronal magnetic field and its slow evolution in consistency with the small scale structure of the photospheric fields. Here we have developed ...
  • Characteristics of night sporadic-E at Kodaikanal 
    Sastri, J. H; Murthy, B. S (National Institute of Science Communication And Information Resources, 1975-09)
    Published ionospheric data were used as a basis to study the characteristics of nighttime Es (blanketing frequency, virtual height, and transparency range) at Kodaikanal (geomag. lat.: 0.6 N; dip: 3.5 N) with the object ...
  • Occurrence of M and N echoes at the equatorial station, Kodaikanal 
    Sastri, J. H; Murthy, B. S (National Institute of Science Communication And Information Resources, 1975-03)
    Results are presented from a study on the occurrence of M and N traces on ionograms at the equatorial station Kodaikanal, with particular reference to their associations with various sporadic configurations. It is shown ...
  • Daily variation of the equatorial geomagnetic field in the vicinity of the IMF sector boundaries 
    Murthy, B. S (National Institute of Science Communication And Information Resources, 1979-12)
    The response of the equatorial geomagnetic field to the passage of over 170 spacecraft-observed and well-established sector boundaries during the period 1962-1972 has been studied. It is shown from superposed epoch analysis ...
  • The Wilson-Bappu effect for Mg II k-line emission widths 
    Parthasarathy, M (D.Reidel Publishing, 1985)
    The existence of a tight linear correlation between the stellar absolute magnitude Mv and the Mg II k-line emission width log WMg II k (km s/sup-1) is confirmed using IUE high-resolution (0.2 Å) data for 100 late-type stars.
  • Effect of electrojet on the total electron content of the ionosphere over the Indian subcontinent 
    Deshpande, M. R; Rastogi, R. G; Vats, H. O; Sethia, G; Klobuchar, J. A; Jain, A. R; Subbarao, B. S; Patwari, V. M; Janve, A. V; Rai, R. K; Singh, M; Gurm, H. S; Murthy, B. S (Nature Publishing Group, 1977-06)
    The radio beacon method of measuring TEC along a chain of optimally spaced stations near the equatorial anomaly has been used to monitor continuously the latitudinal extent of the anomaly. Comparisons with the magnitude ...

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