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Browsing Kodaikanal Observatory Publications by Title

Browsing Kodaikanal Observatory Publications by Title

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  • Solar and Stellar Convection 
    Narasimha, D (Indian Institute of Astrophysics, Bangalore, 1988)
    The flow field in stellar convection zones, characterised by high Rayleigh number, low Prandtl number and large Reynolds number, is time dependent and turbulent, consisting of eddies having a range of scale-lengths upto ...
  • Solar Convection and Oscillations 
    Chitre, S. M (Indian Institute of Astrophysics, Bangalore, 1986)
    A wide variety of gravity and acoustic wave motions have been detected at the surface of the Sun as Doppler shifts of spectral lines. These velocity field provide a valuable probe for studying the internal solar structure ...
  • The solar corona in the He II line 
    Shylaja, B. S (Indian Institute of Astrophysics, 1997)
    The corona of the sun was photographed with the filters centered at 4686Å, 4921 Å and 5812 Å, on 24th October 1995, during totality at Nim Ka Thana The PDS scans of these Images were presented The differences In the contours ...
  • 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 ...
  • Solar Eclipse and its effect on Epilepsy 
    Sheji, P (Indian Institute of Astrophysics, Bangalore, 1997)
    A study was conducted at the Indian Epilepsy foundation to investigate the possibility of seizure being precipitated by the solar eclipse viewed on October 24, 1995. 47 known epileptic parient were included under the ...
  • Solar magnetic field and rotation 
    Gokhale, M. H (Indian Institute of Astrophysics, Bangalore, 1988)
    Sun’s highly inhomogeneous asymmetrical, and time dependent magnetic field plays a vital role in the non-Radiative energy transport that maintains the inhomogeneous asymmetrical and time dependent atmosphere of the sun ...
  • Solar Neutrino Puzzle 
    Sarma, K. V. L (Indian Institute of Astrophysics, Bangalore, 1988)
  • Solar Optical Observations from Kodaikanal and from Eclipses 
    Singh, J (Indian Institute of Astrophysics, Bangalore, 1986)
    From an analysis of a long series of Calcium K spectroheliograms taken at Kodaikanal, systematic changes in the sizes of supergranule cells have been found. The average cell size changes with the phase of solar cycle, being ...
  • The solar prominence of 1916, May 26 
    Evershed, John (Indian Institute of Astrophysics, Bangalore, 1917-01-25)
  • Solar Supergranulation and two-dimensional Hydrodynamic Turbulence 
    Krishan, V (Indian Institute of Astrophysics, Bangalore, 1988)
    In a two-dimensional incompressible fluid, the total energy as well as the total squared vorticity called enstrophy is conserved. It is found that the energy spectrum in two-dimensional hydrodynamic turbulence cascades to ...
  • Solar Ultraviolet Flux Variation in the Biological Band during the Total Solar Eclipse of October 24, 1995 
    Niranjan, K; Thulasiraman, S; Reddy, Y. S (Indian Institute of Astrophysics, Bangalore, 1997)
    Solar UV B Flux measurements have been made at four discrete wavelengths of 290, 300, 310 and 320 nm during and around the solar eclipse day of 24th October 1995. The Diurnal variation of the UV flux has shown the recovery ...
  • Solar X-ray bursts 
    Rausaria, R. R (Indian Institute of Astrophysics, Bangalore, 1988)
    The experimental results of X-ray bursts about spectral characteristics, spatial distribution and directivity measurements carried out with PVO/ISEE-3 spacecraft imaging instruments of HXIS and Hard X-ray burst spectrometers ...
  • Solution of radiative transfer equation in spherically symmetric media with spherical harmonic approximation 
    Peraiah, A (Indian Institute of Astrophysics, 1979-11)
    A numerical method for obtaining solution of radiative transfer equation in spherically symmetric media with spherical harmonic approximation is presented. The angle derivative is approximated by an orthonormal polynomial ...
  • Some Aspects of Rayleigh and Mie Scattering in the Atmosphere Over Pune 
    Devara, P. C. S; Raj, P. E (Indian Institute of Astrophysics, Bangalore, 1991)
    Computations of aerosol mixing ratio [( Na + Nm)/Nm] have been made using the aerosol number density (Na) estimated from the laser radar (lidar) observations carried out at the IITM, Pune and air molecular number density ...
  • Some features of Ha dark markings on the sun 
    Royds, T (Government Observatory, Madras, 1920-08-05)
  • Speckel Interferometry of SN 1987A and the "Mystery Spot" 
    Nityananda, Rajarama (Indian Institute of Astrophysics, 1988)
    Two groups have independently studied SN1987A by the technique of optical speckle interferometry in the visible region of wavelengths about a month after the explosion. Both detect a secondary source a factor of ten fainter ...
  • A Speckle Experiment during the Partial Eclipse 
    Saha, S. K; Nagabhushana, B. S; Ananth, A. V; Venkatakrishnan, P (Indian Institute of Astrophysics, Bangalore, 1997)
    An experiment for the speckle reconstruction of solar features was developed for observing the partial eclipse of the sun as viewed from Bangalore on October 24, 1995. No data could be obtained because of cloudy sky but ...
  • Spectroscopic studies of the solar corona during total solar eclipse of October 24, 1995 
    Ananda Rao, B. G; Ashok, N. M; Chandrasekhar, T; Desai, J. N; Nanda Kumar, M. S (Indian Institute of Astrophysics, 1997)
    We have obtained Fabry-Perot Interferograms of the solar corona during the 1995 total solar eclipse, in two emission lines, Fe X line at 6374Å and Fe XIV line at s303 Å. We have also obtained a Fabry-perot-gram of the ...
  • Spectroscopy, Multicolour Photometry and Structure of the Solar Corona during the Total Solar Eclipse on October 24, 1995 
    Rusin, V; Klocok, L; Minarovjech, M; Rybansky, M (Indian Institute of Astrophysics, Bangalore, 1997)
    A brief description of the scientific goals and preliminary results related to the 24 October 1995 solar eclipse at Nim Ka Thana is given. The white-light corona was of a minimum type above the E- and W-limbs. Coronal holes ...
  • Stellar Winds in O and B Type Stars: Hydrogen Atmosphere 
    Peraiah, A; Varghese, B. A (Indian Institute of Astrophysics, Bangalore, 1993)
    We present the results of calculations of radiation driven stellar winds O-B stars. The equations of conservation of mass and momentum are solved self consistently with the equation of line transfer. The influence of ...

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