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Browsing Publications of Astronomical Society of India by Title

Browsing Publications of Astronomical Society of India by Title

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  • Study of a quiescent prominence 
    Joshi, A; Gaur, V. P; Pande, M. C (Astronomical Society of India, 1995)
    The evolution of a quiescent prominence (QP) seen on the NW solar limb from 11 to 13 June 1991 has been studied. The observations of the main-phase activity of the QP on 12 June 1991 are also discussed.
  • Study of bubble nebula using IUE high resolution spectra 
    Anand, M. Y; Kagali, B. A; Murthy, J (Astronomical Society of India, 2009-06)
    In this paper, we have analyzed IUE high resolution spectra of the central star (BD+602522) of the Bubble nebula. We discuss velocities of the different regions along the line of sight to the bubble. We find that the Bubble ...
  • A study of coronal streamers during the total solar eclipse of 1980 February 16 
    Raju, A. K; Abhyankar, K. D (Astronomical Society of Indian, 1988)
    Procedure outlined by Saito and Billings has been used for deriving the three dimensional configurations of 17 coronal streamers from the photographs of total solar eclipse of 1980 Feburary 16. Almost all streamers were ...
  • The study of cosmic ray intensity distribution near earth 
    Shrivastava, P. K; Shukla, R. P (Astronomical Society of India, 1993)
    The cosmic ray density distribution near earth is generally investigated by using the yearly excursion in the heliographic latitudinal position of earth. The study has been done for 1978 to 1990 to determine the density ...
  • Study of cosmic ray intensity variation during quiet interplanetary periods 
    Shrivastava, P. K; Shukla, R. P (Astronomical Society of India, 1996)
    Various solar controlled disturbances in interplanetary medium represented by solar flares, coronal holes, solar wind streams, generally produced significant decreases in cosmic ray intensity as well as enhancement in ...
  • Study of Es occurrences during meteor shower periods at Hyderabad by using FM radio signals 
    Yellaiah, G; Suresh, K; Raghavender, B (Astronomical Society of India, 2001)
    Sporadic-E occurrences are found to be more during meteor shower periods when compared to non-shower periods. Meteor activity can be estimated by recording the radio signals reflected by meteor trails. In the present paper, ...
  • A Study of Giant Radio Galaxies 
    Konar, C; Saikia, D. J; Ishwara-Chandra, C. H; Kulkarni, V. K (Astronomical Society of India, 2003)
    Multi-frequency radio observations have been made of a sample of 17 giant radio galaxies, many of whose structures were not well determined earlier. These sources were observed with the VLA D- and B/C arrays at C and L ...
  • Study of inhomogeneities in the solar atmosphere 
    Kariyappa, R (Astronomical Society of India, 1993)
  • A study of Lonar lake- a meteorite-impact crater in basalt rock 
    Taiwade, V. S (Astronomical Society of India, 1995)
    The Lonar lake in Buldhana district of Maharashtra, India, is a meteorite-impact crater. The uniqueness of this crater is that it has been formed in a strata of hard igneous rocks known as basalt rocks. Astronomers compare ...
  • Study of MHD surface waves along the interfaces of the magneto sheath, boundary layer and magnetosphere with the effect of solar wind 
    Rathinavelu, G. D; Sivaraman, M; Satya Narayanan, A; Somasundaram, K (Astronomical Society of India, 2007-12)
    The magnetospheric boundary layer, which is the interface between the magneto sheath and the magnetosphere, has been considered to be the plasma slab surrounded by moving and static plasma media on either side. The ...
  • Study of Old Open Clusters NGC 1605, Czernik 18, NGC 2509 
    Sujatha, S; Babu, G. S. D (Astronomical Society of India, 2003)
    We present the first CCD photometric UBVRI observations of three open clusters NGC 1605 (OCI 406), Czernik 18 (OCI 426) and NGC 2509 (OCI 630) obtained by using the 1.02 m telescope at Vainu Bappu Observatory, Kavalur. ...
  • Study of open cluster NGC 2509. 
    Sujatha, S; Babu, G. S. D (Astronomical Society of India, 2003)
    We present the first CCD photometric observations of the open cluster ocl 630 (NGC 2509) in UBVRI filters. It is a fairly nearby cluster at a distance of 912±15 pc, and is placed in the direction of the Puppis constellation ...
  • A study of planetary nebulae 
    Surendiranath, R (Astronomical Society of India, 1993)
  • Study of quasar broad emission region from spectroscopy of multiple images 
    Narasimha, D; Srianand, R (Astronomical Society of India, 2000)
    Using the high resolution radio observations and analysis of the broad emission lines as well as continum in the optical spectra of the multiple images of quasars, we provide a method to probe the structure and dynamics ...
  • Study of Radio and Optical Polarization Anisotropies in the Electromagnetic Waves from Extragalactic Sources 
    Sarala, S (Astronomical Society of India, 2003)
    Polarizations of electromagnetic radiation from active galactic nuclei (AGN) show some interesting effects such as the existence of a global anisotropy in the orientations of the radio wave polarizations from distant radio ...
  • Study of sky condition at Raipur and calibration of the photometer-telescope system 
    Padmakar; Barway, Sudhanshu; Pandey, S. K (Astronomical Society of India, 2000)
    To investigate local sky condition for valuable astronomical observation, we obtained values of atmospheric extinction coefficients in BVR filters for over 150 nights during the period of 1994 to 1997. Our observation over ...
  • Study of solar wind using single-station interplanetary scintillation 
    Manoharan, P. K (Astronomical Society of India, 1993)
    This thesis is based on the study of interplanetary scintillation (IPS) measurements using compact radio sources. In this study, I have shown for the first time that the solar-wind velocities may be estimated reliably and ...
  • Study of Sun's rotation and solar activity 
    Javaraiah, J (Astronomical Society of India, 2002-09)
    In my thesis I have presented many interesting properties of Sun's rotation and magnetic activity derived from extensive analysis of over 100 year photoheliographic data on sunspot activity and 26 year's data on ...
  • A study of the Cometary Globules in the GUM Nebula 
    Sridharan, T. K (Astronomical Society of India, 1993)
    Among the smaller interstellar molecular clouds the Cometary Globules (CGs) stand out due to their peculiar morphology. They are characterized by compact, dusty heads with long faintly luminous tails extending on one side ...
  • Study of the emission line spectra and the stellar populations of starburst galaxies 
    Ravindranath, S; Prabhu, T. P (Astronomical Society of India, 2000)
    Based on the optical-NIR spectra, we discuss the nebular properties and stellar populations of starburst nuclei. Starbursts are found to have higher electron densities and higher excitations compared to HII nuclei. We find ...

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