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Browsing by Author "Sreedhar Rao, S"

Browsing by Author "Sreedhar Rao, S"

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  • HR3040- on the Am track ? 
    Sreedhar Rao, S; Raghavender Rao, C; Kilambi, G. C (Astronomical Society of India, 1999)
    HR 3040 (HD 63589) exhibits pseudo-luminosity effects similar to many a main-sequence Am star, especially a strong Sr II 4077 line indicating a higher luminosity class. Its K-line matches that of A3 V, violet and blue ...
  • A note on the spectra of epsilon Aurigae 
    Subrahmanyam, P. V; Raghavender Rao, C; Sreedhar Rao, S (Astronomical Society of India, 1993-03)
    Spectroscopic observations of the long period variable epsilon Aurigae were made during its 1982-84 eclipse. It is found that the Ca II H and K lines show variation in their equivalent widths. The equivalent widths of these ...
  • Photographic astrometry of Comet Halley 
    Ballabh, G. M; Kilambi, G. C; Sanwal, N. B; Sreedhar Rao, S; Swaminathan, R; Raghavender Rao, C (Astronomical Society of Indian, 1989-12)
    The 20-cm astrograph of the Nizamiah and Japal-Rangapur Observatoies in India was used to obtain photographic plates of Comet Halley before and after perihelion during the 1985-1986 apparition. The images are reduced and ...
  • The spectral behaviour of A-type metallic line spectroscopic binary 41 Sex A 
    Sreedhar Rao, S; Abhyankar, K. D; Nagar, P (Astronomical Society of India, 1990)
  • Spectroscopic binary orbits and MK morphological studies of some AM stars 
    Sreedhar Rao, S (Astronomical Society of India, 1993)
    The metallic-line A type stars (Am) on the main sequence are known to be largely the members of binary systems and therefore yield periods. Due to their small equatorial radial velocities, they display sharp spectral lines ...

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