IIA Institutional Repository

Browsing IIAP Publications by Subject "Absorption Spectra"

Browsing IIAP Publications by Subject "Absorption Spectra"

Sort by: Order: Results:

  • A central gravitational redshift model for the absorption redshift systems in quasi-stellar objects 
    Das, P. K (Royal Astronomical Society, 1979-01)
    Static, spherically symmetric configurations of core and envelope type have been considered in General Relativity as central gravitational redshift models for the quasi-stellar objects (QSOs) and an attempt has been made ...
  • The dependence of He I 10830 absorption on X-ray luminosity in RS CVn binaries and very active F and G main-sequence stars 
    Mekkaden, M. V (Kluwer Academic Publishers, 1985-03)
    A study of the relationship between soft X-ray luminosity and He I 10830 equivalent width in RS CVn binaries and very active late-type main-sequence stars is made. Long-period RS CVns and very active F and G main-sequence ...
  • Effects of temperature and velocity gradients on Doppler widths 
    Peraiah, A; Varghese, B. A (D. Reidel Publishing Co., 1986-10)
    The effects of gradients of temperature and expansion velocities on Doppler widths is investigated, and the emergent profiles of lines in different spherically symmetric media are calculated. The variations of the source ...
  • Identification of new CeO features in the S star Pi Gruis 
    Murty, P. S (Gordon and Beach, Science Publishers, 1983)
    Spectrograms in the 6040-7300 A wavelength region of the S star Pi Gruis reveal the presence of new molecular features attributable to CeO. Measures of band heads compared reasonably well with the laboratory spectrum. The ...
  • IUE observations of high galactic latitude F supergiants HD 161796 and HD 187885 
    Parthasarathy, M; Pottasch, S. R; Wamsteker, W (European Southern Observatory, 1988-09)
    Low resolution (6 A) IUE ultraviolet spectra of the high galactic latitude F supergiants HD 161796 (F3 Ib) and HD 187885 (F2-3I) are analyzed. The UV spectrum (1250 A to 3250 A) of HD 161796 shows no excess UV flux ...
  • K emission line widths in the sun and the stars 
    Bappu, M. K. V; Sivaraman, K. R (Royal Astronomical Society, 1977-02)
    K-emission line widths measured with a micrometer on integrated spectra of the sun have a mean value of 38.2 km/s. A definition is proposed whereby the width is a measure in km/s at the inverse-e value of the difference ...
  • Observations and interpretation of solar decametric absorption bursts 
    Gopalswamy, N; Thejappa, G; Sastry, Ch. V (Indian Academy of Sciences, 1983-09)
    The observations of intensity reductions or absorption bursts in the solar decametric radio-continuum are reported. The reductions are interpreted as the absorption of continuum radiation by a shock-generated ion sound ...
  • Observations of the Rosette Nebula using the Decameter Wave Radio Telescope at Gauribidanur 
    Deshpande, A. A; Shevgaonkar, R. K; Sastry, Ch. V (D. Reidel Publishing Co., 1984-07)
    A map of Rosette Nebula in continuum absorption is made at 34.5 MHz using the Decameter Wave Radio Telescoe at Gauribidanur, India, with a resolution of 26×40, is presented. These observations are combined with the 2700 ...
  • On AlF lines in sunspots 
    Murty, P. S (D. Reidel Publishing Company, 1977-10)
    Intensity factors for bands of the C-A transition of the AlF molecule are calculated. A reinvestigation for the lines of (0, 0) band of the C-A system in sunspot spectra is suggested, so as to resolve the questionable ...
  • On the Balmer progression in the expanding shell of Pleione 
    Peraiah, A (Indian Academy of Sciences, 1982-09)
    An attempt has been made to explain the Balmer progression in velocities seen in Pleione and other shell stars. Equations of conservation of mass and momentum are simultaneously solved with assumptions which simplify the ...
  • On the e/sup1Σ/sup+ - d/sup1Σ/sup+ transition of TiO related to cool star spectra 
    Murty, P. S (Gordon and Breach Science, 1977)
    Based on the calculated intensity factors for the bands of the e/sup1Σ/sup + - d/sup 1 Σ/sup + transition of the TiO molecule, expected positions of unobserved bands are indicated, for use in studies of cool star spectra. ...
  • A precision direct-reading spectrophotometer 
    Narayan, A. L; Ananthasubrahmanyam, C. K (Calcutta University Press, 1940-10)
    The experimental errors inherent in photographic photometry are discussed and a direct reading spectrophotometer for the visible especially adapted to the study of line, contour and absorption and fluorescence spectra is ...
  • The predicted infrared spectrum of ZrO and its possible presence in S stars 
    Murty, P. S (D. Reidel Publishing Company, 1980-04)
    The unidentified absorption feature at 9730 ± 5 A observed in the spectra of pure S stars is provisionally identified with the predicted 9732 A (0, 0) band of the e `IT-c `z\ transition of ZrO molecule. Relative band ...
  • SN 1993J in M 81: Optical photometry and spectrophotometry during the first two months 
    Prabhu, T. P; Mayya, Y. D; Singh, K. P; Kameswara Rao, N; Ghosh, K. K; Mekkaden, M. V; Pati, A. K; Raveendran, A. V; Reddy, B. E; Sagar, R; Subramaniam, A; Surendiranath, R (The European Southern Observatory, 1995-03)
    CCD photometric and spectrophotometric data on the type IIb supernova 1993J in M 81 (NGC 3031) obtained from Vainu Bappu Observatory, Kavalur, during the first two months since the outburst are reported. The evolution of ...

Search DSpace


Browse

My Account