Browsing by Title

Sort by: Order: Results:

  • Chromospheric variations with solar cycle phase using imaging and spectroscopic studies 
    Sindhuja, G; Singh, J; Priyal, M (Oxford University Press on behalf of the Royal Astronomical Society, 2015-04-11)
    Spectroscopic observations of Sun in Ca-K line profile were made as a function of latitude and integrated over the visible 180◦ longitude at the Kodaikanal observatory since 1985. The spectroheliograms of the Sun in Ca-K ...
  • Circular polarization in pulsars due to curvature radiation 
    Gangadhara, R. T (Institute of Physics, 2010-02-10)
    The beamed radio emission from relativistic plasma (particles or bunches), constrained to move along the curved trajectories, occurs in the direction of velocity. We have generalized the coherent curvature radiation model ...
  • Circular Polarization Observations of Type II Solar Radio Bursts and the Coronal Magnetic Field 
    Ramesh, R; Kathiravan, C; Ebenezer, E (American Astronomical Society, 2022-06-10)
    It is well known that magnetic field strength (B) in the solar corona can be calculated using the Alfvén Mach number (MA) and Alfvén speed (vA) of the magnetohydrodynamic shock waves associated with coronal type II radio ...
  • Circumstellar disks around Herbig Ae/Be stars: Polarization, outflows and binary orbits 
    Maheswar, G; Manoj, P; Bhatt, H. C (EDP Sciences, 2002-06)
    The geometrical relationship between the distribution of circumstellar matter, observed optical linear polarization, outflows and binary orbital plane in Herbig Ae/Be stars is investigated. Optical linear polarization ...
  • Circumstellar dust shells of hot post-AGB stars 
    Gauba, G; Parthasarathy, M (EDP Sciences, 2004-04)
    Parameters of the circumstellar dust shells of 15 hot post-AGB stars have been derived using a radiative transfer code (DUSTY). Combining the optical, near and far-infrared (ISO, IRAS) data of the stars, we have reconstructed ...
  • Circumstellar environment around young stars in nearby OB associations 
    Manoj, P; Maheswar, G; Bhatt, H. C (Astronomical Society of India, 2002-09)
    We study the circumstellar environment around intermediate mass young stars in nearby OB associations of different ages. We find that a significant fraction of stars in these associations ha.ve cool circumstellar ...
  • City scientists spot new asteroids 
    Times of India (Times of India, 1987-08-14)
  • Classes 
    Meikle, J. J (Astronomical Society of India, 1912-02)
  • Classical Be stars in our Galaxy and the Magellanic Clouds 
    Subramaniam, A; Mathew, B; Paul, K. T; Mennickent, R. E; Sabogal, B (Astronomical Society of India, 2012)
    We summarise our studies of the Classical Be (CBe) stars in our Galaxy and in the Large and Small Magellanic Clouds. We studied their properties using optical and near-IR photometry and optical spectroscopy. The CBe stars ...
  • Classical Cepheids and the local chemical inhomogeneities in the galactic disc 
    Giridhar, S (1986-06)
    Places of formation have been derived for a sample of 23 Cepheids with well-determined atmospheric abundances in an attempt to study the chemical inhomogeneities in the local interstellar medium. The abundance data available ...
  • Classification and characterization using HCT/HFOSC spectra of carbon stars selected from the HES survey 
    Meenakshi, P; Goswami, A (Springer, 2024-01)
    We present results from the analysis of 88 carbon stars selected from Hamburg/ESO (HES) survey using low-resolution spectra (R ∼1330 & 2190). The spectra were obtained with the Himalayan Faint Object Spectrograph Camera ...
  • Classification and disk parameters of Herbig Ae/Be stars using WISE and AKARI data 
    Subramaniam, A; Adara, B (Astronomical Society of India, 2013-12)
    We present the classification and disk parameters of 50 Herbig Ae/Be stars using WISE and AKARI data. These stars have been classified into 4 groups based on the scheme proposed by Koenig et al. (2012) using WISE pass bands ...
  • Classification of colliding galaxies 
    Narasimhan, K. S. V. S; Sastry, K. S; Alladin, S. M (Astronomical Society of India, 1996)
    we propose a classification scheme for colliding galaxies based on the fractional changes in their binding energy and the orbital energy. We give examples of actual observed pairs of interacting galaxies for the various ...
  • Classification of colliding galaxies - II 
    Narasimhan, K. S. V. S; Alladin, S. M; Sastry, K. S (Astronomical Society of India, 2000)
    In our Paper I we had classified galaxies in increasing order of the intensity of tidal effects on the basis of transfer of energy from the motion of galaxies to the internal motions. This work has been refined by presenting ...
  • Classification of M-Type Stars from Spectral Scans 
    Rautela, B. S; Joshi, S. C (Astronomical Society of India, 1979-06)
    Continuous spectral scans of 64 M-Type stars in the wavelength region 400-750 nm have been obtained with a bandwidth of 5 nm. The scans have been placed on an absolute energy scale. In this paper we discuss three classification ...
  • Classification of Magnetoatmospheric Modes in Sunspot Umbrae 
    Hasan, S. S; Sobouti, Y (International Astronomical Union, 1990)
    We examine the wave modes in a sunspot umbra. Assuming stratification, based on a model atmosphere in a sunspot, the normal mode spectrum is determined. The modes are classified using a scheme based on a Helmholtz decomposition ...
  • Classification of MODIS fire emission data based on aerosol absorption Angstrom exponent retrieved from AERONET data 
    Shantikumar, N. S; Khatri, Pradeep; Larson, E. J. L; Dumka, Umesh Chandra; Sarangi, Chandan; Vineeth, R (Elsevier B.V., 2023-02-01)
    Biomass burning emits a large quantity of gaseous pollutants and aerosols into the atmosphere, which perturbs the regional and global climate and has significant impacts on air quality and human health. In order to understand ...
  • Classification of Nova Spectra 
    Anupama, G. C (Astronomical Society of India, 2012)
    The evolution of the optical spectrum of a nova outburst is described. The classification schemes used to classify novae based on the outburst spectral features and their evolution are discussed.
  • Classification of ultraviolet stellar spectra using artificial neural networks 
    Gulati, R. K; Gupta, R; Gothoskar, P; Khobragade, S (Astronomical Society of India, 1996)
    Scheme based on the artificial neural networks (ANNs) trained with multi-layer back propagation using single level network for classifying ultraviolet spectra in the IUE Low-Dispersion Spectra Reference Atlas is presented. ...
  • A classification scheme for pulsars 
    Kochhar, R. K (Nature Publishing Group, 1977-11)
    The implications of a pulsar classification scheme are discussed. Three types of pulsars are distinguished - Type S (S for single) from supernova explosions of single stars; type D (D for disrupted) from binaries disrupted ...

Search DSpace

Browse

My Account