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Browsing by Author "Rangarajan, K. E"

Browsing by Author "Rangarajan, K. E"

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  • Parametric Study of Molecular Line Polarization in the Solar Atmosphere 
    Rangarajan, K. E; Mohan Rao, D (Indian Academy of Sciences, 2000-12)
  • Photon escape probabilities in expanding atmospheres 
    Peraiah, A; Rangarajan, K. E; Mohan Rao, D (Indian Academy of Sciences, 1981-03)
    A comparison of mean number of scatterings and escape probabilities has been made in isotropic scattering and dipole scattering by using the angle-averaged partial frequency redistribution functionR I. We have solved the ...
  • Polarized resonance line transfer with collisional redistribution 
    Mohan Rao, D; Rangarajan, K. E (European Southern Observatory, 1993-07)
  • Preliminary analysis of the broad he i emission lines in R CrB 
    Surendiranath, R; Rangarajan, K. E; Kameswara Rao, N (D. Reidel Publishing Co, 1986)
  • Resonance line polarization in the presence of wave motion 
    Rangarajan, K. E (European Southern Observatory, 1997-04)
    The effect of wave velocity on resonance line polarization is studied. We assumed a photosphere - chromosphere type of temperature structure for the atmosphere with plane parallel symmetry. The "Discrete Space Theory ...
  • Simulation of multiple aperture synthesis 
    Saha, S. K; Jayarajan, A. P; Rangarajan, K. E; Chatterjee, S (European Space Observatory, 1988)
    In view of the importance of multiple aperture synthesis in optical astronomy, a computer simulation of the same is demonstrated. The fringe patterns obtained through the aperture mask of six and nine holes arranged ...
  • Solar astronomy at high altitude 
    Hasan, S. S; Bagare, S. P; Rangarajan, K. E (Indian National Science Academy, 2014-11)
    A major project called the National Large Solar Telescope (NLST) has been proposed for pursuing Solar Astronomy at High Altitude. The project envisages the development of a state-of-the-art 2-m class telescope to carry ...
  • Solar G-band observations at Merak, Leh/Ladakh 
    Vasantharaju, N; Dorjey, N; Ravindra, B; Prabhu, K; Rangarajan, K. E; Prabhu Ramkumar, B; Sankarasubramanian, K (Indian Institute of Astrophysics, 2012)
    G-band observations are important for the study of dynamics of magnetic features in the solar photosphere and they are carried out using large telescopes, larger than 30 cm. We installed a 40 cm DFM telescope at one of ...
  • Spectropolarimetry of an active region at the photosphere and chromosphere 
    Nagaraju, K; Sankarasubramanian, K; Rangarajan, K. E (Astronomical Society of the Pacific, 2009-06)
    Initial results on the simultaneous spectropolarimetric observations of an active region at the photosphere and chromosphere are presented. For this purpose, the Fe I line at λ6569 and the H I at λ6563 (Hα) are used. ...
  • Spectropolarimetry with the NLST 
    Sankarasubramanian, K; Hasan, S. S; Rangarajan, K. E (Springer, 2010)
    India’s National Large Solar Telescope (NLST) will provide opportunities to observe the Sun with high spatial, spectral, and polarimetric resolution. The large aperture also enables high-cadence spectropolarimetry with ...
  • Transit of Venus on 2012 June 06: stray light estimation and restoration of Ca-K images of Twin Telescope from Kodaikanal Observatory 
    Prabhu, K; Rangarajan, K. E; Ravindra, B; Sankarasubramanian, K; Selvendran, R; Kumaravel, P (Astronomical Society of India, 2013-09)
    Observations of the transit of Venus were made from the Kodaikanal Observatory on 2012 June 06 in Ca-K wavelengths. Only half of the event was visible from India. We utilized this unique opportunity to compute the contribution ...
  • VRI photometry of LMC SN 1987A 
    Rangarajan, K. E; Jayakumar, K; Appakutty, M; Sheriff, H. D (Konkoly Observatory, 1987-07)

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