Kodaikanal Observatory Bulletins (1905 - 1997 ): Recent submissions

  • Atlas of H-Alpha Synoptic Charts for Solar Cycle 19 (1955 - 1964): Carrington Solar Rotations 1355 to 1486 
    Makarov, V. I; Sivaraman, K. R (Indian Institute of Astrophysics, Bangalore, 1986)
  • Reflection Nebula in the Far Ultraviolet: Icy Grains 
    Shah, G. A; Krishna Swamy, K. S (Indian Institute of Astrophysics, Bangalore, 1978)
    Some models of the reflection nebula in the form of homogeneous plane parallel slab containing singly scattering dirty ice grains as test case have been given. The three geometric cases of the star behind, within and in ...
  • The Wolf-Rayet Spectrscopic Binary HD 214419 
    Bappu, M. K. V; Visvanadham, P (Indian Institute of Astrophysics, Bangalore, 1977)
    Velocity curves of the system HD 214419 are obtained for the N IV 4058 and He II 4686 emission lines from prismatic spectra taken in 1951 and 1952. The emission and absorption features experience several phase dependent ...
  • A Survey of Red Stars in the Direction of the Large Magellanic Cloud: The 30 Doradus Region 
    Bappu, M. K. V; Parthasarathy, M; Scaria, K. K (Indian Institute of Astrophysics, Bangalore, 1977)
    We have commenced a survey of red stars in the direction of the Large Magellanic Cloud using the technique of ultra-low dispersion spectroscopy. This first paper is a listing of the red stars in the 30 Doradus region for ...
  • Early Nebular Stage of Nova Cygni, 1975 
    Prabhu, T. P (Indian Institue of Astrophysics, Bangalore, 1977)
    The emission line profiles of the spectrum of the spectrum of the envelope of Nova V 1500 Cyg, 1975 are studied. The spectral region covers LamdaLamda 3700-8800. The velocity structure of the profiles and the time variation ...
  • An Analog System for Fast Light Curve Registration 
    Bhattacharyya, J. C; Sundareswaran. A (Indian Institute of Astrophysics, Bangalore, 1977)
    An electronic system for recording fast light curves is described. The system employs a two track magnetic tape recorder for intermediate storage of photometer and time signals and reproduces these on cathode ray oscilloscope ...
  • An Automated Spectrum Scanner 
    Bappu, M. K. V (Indian Institute of Astrophysics, Bangalore, 1977)
    A rapid-scan single channel spectrum in the Ebert-Fastie arrangement has been constructed and successfully used on the Kavalur 102-cm reflector. The special region 3000-11000 Armstrong is covered with appropriate dry-ice ...
  • Numerical Methods for Mie Theory of Scattering by a Sphere 
    Shah, G. A (Indian Institute of Astrophysics, Bangalore, 1977)
    A new procedure for evaluating the basic quantities connected with the Mie theory of scattering by a sphere is presented. Some independent numerical techniques are developed to enable one to achieve the desired accuracy. ...
  • Fundamental Flux Tubes in the Solar Magnetic Fields: Generation of the FFT's and the periodic field reversal 
    Gokhale, M. H (Indian Institute of Astrophysics, Bangalore, 1977)
    It is conceviable that the periodic reversal of the Sun'd large-scale magnetic field and the concentration of the field in strong, thin flux tubes on small scales could bith result from the following likely processes near ...
  • Intensity Fluctuation in the Solar Chromosphere 
    Sivaraman, K. R; Venkitachalam, P. P (Indian Institute of Astrophysics, Bangalore, 1977)
    High resoulution spectrograms of the Balmer lines obtained at five positions from the centres to the limb have been used to study the r. m. s. intensity fluctuations and their dependence on the heliocentric angle. The ...
  • The Near Infrared Spectra of Wolf Rayet Stars 
    Bappu, M. K. V; Ganesh, K. S; Scaria, K. K (Indian Institute of Astrophysics, Bangalore, 1977)
    The near infrared spectra of three Wolf-Rayet stars of the carbon sequence and five of the nitrogen sequence have been studied. Wavelength identifications and intensity scans are presented to show the emission line ...
  • Fundamental Flux Tubes in the Solar Magnetic Fileds: Significance of the Flux-amount; possibility of rising and durability 
    Gokhale, M. H (Indian Institute of Astrophysics, Bangalore, 1977)
    For a satisfactory understanding of the solar magnetic phenomena it may be advantageous first to interrelate phenomenologically observations involving different scales of length and time and in different layers of the solar ...
  • NU Centauri: A New Beta Cephei Star 
    Rajamohan, R (Indian Institute of Astrophysics, Bangalore, 1977)
    Spectroscopic observations of the single-lined binary, NU Centauri during the years 1968-1972 were utilised to derive fresh orbital elements of this system. The measured radial velocities indicate that the primary component ...
  • Ultra-low dispersion spectroscopy of stars and galaxies 
    Bappu, M. K. V; Parthasarathy, M (Indian Institute of Astrophysics, Bangalore, 1977)
    Application of ultra-low dispersion spectroscopy (10.000 Å mm-1) is described to study the nuclei of elliptical galaxies, the quassi - stellar objects and for the discovery of faint OB stars, reddened stars and red stars. ...
  • SN1987A : Supernova Remnant Prospects 
    Velusamy, T (Indian Institute of Astrophysics, 1988)
  • Supernova Shock 
    Thejappa, G (Indian Institute of Astrophysics, 1988)
    A Violent shock is formed at the site of the collision of inner and outer cores of a collasping star and the supernova explosion is born. Here we briefly review the evolution of the shock from its birth until its death.
  • Gravitational Waves from Collapsing Stars 
    Sivaram, C (Indian Institute of Astrophysics, 1988)
  • Neutrinos from SN 1987A 
    Sivaram, C (Indian Institute of Astrophysics, 1988)
  • Observational Results from SN1987A and their Implications on Theoretical Modelling of Supernovae 
    Ray, Alak (Indian Institute of Astrophysics, 1988)
    In the approximately one year since the explosion of the Supernova 1987A in the Large Magellanic Cloud, a large amount of work, both observational as well as theoretical, has been undertaken. Stan Woosley, a prolific worker ...
  • Rotational Effects in SN 1987A 
    Ramadurai, S; Wiita, Paul J (Indian Institute of Astrophysics, 1988)
    The possible evolutionary effects of rotation on the observational characteristics of SN 1987A and it progenitor Sk -69 202, are explored. If rotation is important, decrease in post main sequence luminosity and increase ...

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