Kodaikanal Observatory, Kodaikanal: Recent submissions

  • Report on observations during total solar eclipse of October 24, 1995 
    Makarov, V. I; Erchov, V. N (Indian Institute of Astrophysics, 1997)
    The solar eclipse -95 took place during the minimum of sunspots and in the period of high level of polar activity of the Sun. we planned to observe the polar coronal structures in order to study the magnetic field in polar ...
  • Catalogue of Stars for 1875 0 from Observations made at the Government Observatory, Madras 1862-1887 
    Pogson, N. R; Smith, C. M (Government Observatory, Madras, 1899)
  • Results of prominence obervations 
    Evershed, John; Evershed, M. A (Kodaikanal Observatory, Kodaikanal, 1917)
  • The spectrum of Sunspots 
    Evershed, John (Kodikanal Observatory, Kodaikanal, 1909)
  • A Single-Cell Photopolarimeter 
    Jain, S. K; Bhattacharyya, J. C (Indian Institute of Astrophysics, Bangalore, 1987-02)
    A simple, single-cell photopolarimeter has been developed for use at the cassegrain focus of the 102 cm Ritchey-Chretien reflector at Kavalur. The design and performance of the instrument are discussed
  • Atmospheric Extinction at Kavalur Observatory during 1980-85 
    Shylaja, B. S; Bhattacharyya, J. C (Indian Institute of Astrophysics, Bangalore, 1986)
    From a series of photoelectric scanner observations during 1980-85, the atmospheric extinction at Kavalur has been analysed. The variation of this appears to follow lamda/sup-4/ law. There is a general increase in the ...
  • Line Profiles in an Expanding Spherical Medium 
    Peraiah, A; Srinivasa Rao, M; Varghese, B. A (Indian Institute of Astrophysics, Bangalore, 1986)
    We have applied the discrete space theory of radiative with the integral operator technique to calculate the spectral line profiles formed in a spherically symmetric expanding stellar atmospheres. We calculated the source ...
  • Relativistic effects on Radiative Transfer Equation: Order of Magnitude study 
    Peraiah, A (Indian Institute of Astrophysics, Banglore, 1986-05)
    We have analyzed how the high gas velocities which are observed in the objects such as the atmospheres of supergiant stars, novae, supernovae, accretion discs around high density objects (like black holes, neutron stars ...
  • Integral Operator Technique of Line Transfer 
    Peraiah, A (Indian Institute of Astrophysics, Bangalore, 1986-05)
    We present details of a new technique of obtaining a numerical solution of the radiative transfer equation in spherical symmetry in a polychromatic system. We employed the integral operators together with an interpolation ...
  • Discretization of the equation of Radiative Transfer with Compton Scattering 
    Peraiah, A (Indian Institute of Astrophysics, Bangalore, 1986-05)
    We have attempted to solve the equation of radiative transfer by including Compton and inverse Compton scattering. We expanded the specific intensity by Taylor series at about v/sup1/ = v/sub0/. The resulting equation has ...
  • P Cygni type profiles 
    Peraiah, A; Srinivasa Rao, M (Indian Institute of Astrophysics, Bangalore, 1985-11)
    We have presented a series of P Cygni type profiles of special lines computed by employing different velocity laws of expansion in a spherically atmosphere. A comparison has been made with those of Beals classification. ...
  • A Computer Controlled Microdensitometer 
    Ananth, A. V (Indian Institute of Astrophysics, Bangalore, 1985-11)
    The paper describes an interface as well as appliaction program developed for logging of digital data from a Carl Zeiss Microdensitometer on the TDC-316 Computer. This has been developed to meet certain requirements of ...
  • Broad Band Photometry of the Solar Corona of 1983, June 11 
    Sivaraman, K. R; Singh, J; Kapoor, R. C; Kariyappa, R (Indian Institute of Astrophysics, Bangalore, 1985-11)
    The solar corona was photographed at an effective wavelength of 6300A during the total eclipse of 1983, June 11 at Indonesia. From the isophotes of the corona, the intensity distributions along the equator, poles, streamers ...
  • A Fast Optical Pulse Counting system for Crab Pulsar 
    Santhanam, P; Bhattacharyya, J. C (Indian Institute of Astrophysics, Bangalore, 1985-11)
    A sub millisecond resolution counting system for recording shapes of short periodic pulses is described. Results obtained in recording the shape of optical pulses from Crab pulsar are given here. The flexibility of the ...
  • A System for Recording Phase Path Variations of Ionospheric Reflections 
    Sastri, J. H; Ramesh, K. B; Ramamoorthy, K. S (Indian Institute of Astrophysics, Bangalore, 1985-11)
    An experimental set-up developed for continuous recording of the phase path variations of reflections at normal incidence from discrete regions of the terrestrial ionosphere is described. Salient features of the system ...
  • A Survey of Red Stars in the Direction of the Large Magellanic Cloud. III. Some Regions North of Bar 
    Bappu, M. K. V; Parthasarathy, M; Scaria, K. K (Indian Institute of Astrophysics, Bangalore, 1985-11)
    We have continued the survey for red stars in the direction of the Large Magellanic Cloud using the technique of ultra-low dispersion spectroscopy. In this paper we list 310 red stars located north of L M C bar. Finding ...
  • Observations on the Fine Structures in Solar Decametric Radio Emission 
    Gopalswamy, N; Thejappa, G; Sastry, Ch. V (Indian Institute of Astrophysics, Bangalore, 1984)
    The Solar decametric radio emission consists of a variety of fine structures. This reflects the complexity of the corona at this level. Two observations, viz. absorption bursts and short duration narrow band bursts are ...
  • Modelling of Plasma Structures in the Solar Atmosphere 
    Krishan, V (Indian Institute of Astrophysics, Bangalore, 1984)
    A maximal helicity principle is proposed to study the stability of plasma structures in the solar atmosphere. This principle derives from the statistical treatment of the magnetohydrodynamical turbulence. The steady state ...
  • Vector Magnetic Field in Prominences: Observations and Analysis 
    Smartt, R. N; House, L. L (Indian Institute of Astrophysics, Bangalore, 1984)
    Measurements of the polarization of the He I D3 multiplet in a prominence allow the magnetic fields associated with the prominence to be deduced. The amount and angle of the linear polarization are governed by the Hanle ...
  • Solar Dynamo Problem 
    Gokhale, M. H (Indian Institute of Astrophysics, Banglore, 1984)
    The origin of solar magnetic field and the flux tube nature of this field on the smallest observed scales are two key problems in solar magnetohydrodynamics. Despite the sucess of kinematical models based on the turbulent ...

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