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Browsing by Subject "Line spectra"

Browsing by Subject "Line spectra"

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  • Simultaneous infrared and H-alpha measurements of Be stars 
    Apparao, K. M. V; Tarafdar, S. P; Verma, R. P; Iyengar, K. V. K; Ghosh, K. K (Indian Academy of Sciences, 1993)
    The observed infrared excess in Be stars is usually interpreted as free-free and free-bound emission from a hot gas envelope around the Be star. This hot gas should also emit H-alpha line radiation. Earlier observations ...
  • A spectrophotometric study of the Wolf-Rayet star HD 50896 
    Shylaja, B. S (Indian Academy of Sciences, 1986-12)
    New spectrophotometric observations of the Wolf-Rayet system HD 50896 are presented and interpreted in terms of its binary nature. The lines of N V, N IV and C IV show moderate variations which can be explained using a ...
  • Spectroscopic evolution of Nova LW Serpentis 1978 during its early decline 
    Prabhu, T. P; Anupama, G. C (Indian Academy of Sciences, 1987-12)
    Spectroscopic observations of Nova LW Serpentis have been obtained in 1978 during its decline from V of about 9.0 to V of about 10.2. It is found that the spectrum and its evolution compare well with those of a typical ...
  • Spectroscopic studies of the southern Cepheid β Dor 
    Giridhar, S (Universidad Nacional Autonoma De Mexico, 1987-05)
    Fine analysis of the southern Cepheid β Dor has been conducted at different phases with the aim to derive atmospheric parameters at those phases. Atmospheric abundances have been derived for Fe group elements and s-process ...
  • Ultraviolet observations of the hydrogen-deficient variable star MV Sagittarii 
    Kameswara Rao, N; Nandy, K (Indian Academy of Sciences, 1982)
    IUE observations of the hydrogen-deficient irregular variable star MV Sgr obtained in June-October 1980 and November 1979 are discussed. The observations reveal a prominent 2200 A absorption feature. A value of E(B - V) = ...
  • The variation of the 5200 feature in HD 34452 
    Shylaja, B. S; Babu, G. S. D (Royal Astronomical Society, 1986-10)
    Spectrophotometric observations of the hot Si star HD 34452 = HR 1732 obtained over a duration of four years, from 1979 to 1983, are presented. The period of variation in the broad-band feature centred around λ5200 is found ...

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