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Browsing by Subject "Stellar Color"

Browsing by Subject "Stellar Color"

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  • Effects of rotation on colours and line indices of stars. III - Binary and peculiar stars 
    Rajamohan, R; Mathew, A (Kluwer Academic Publishers, 1990-02)
    The broad-band UBV colors and the intermediate band uvby colors of Alpha Persei, Pleiades, and the Scorpio-Centaurus association are analyzed for rotation effects. An attempt was made to discriminate normal single stars ...
  • Effects of rotation on the colours and line indices of stars. I - The Alpha Persei Cluster 
    Rajamohan, R; Mathew, A (Indian Academy Sciences, 1988-06)
    Analysis of the available observational data for the Alpha-Persei cluster members shows that rotation effects on the intermediate-band indices c1 and (u-b) are considerable. In c1, rotation produces a reddening of 0.040 ...
  • Epsilon Aurigae in eclipse - The light and colour variations 
    Parthasarathy, M; Frueh, M. L (D. Reidel Publishing Co., 1986-06)
    Theuvby andVRI observations of Aur during the ingress and early totality phases obtained at the McDonald Observatory are analysed. The light and colour variations of Aur during the 1982–1984 eclipse are compared with ...
  • Evolution of starspot regions in DM UMa 
    Mohin, S; Raveendran, A. V; Mekkaden, M. V; Hall, D. S; Henry, G. W (Kluwer Academic Publishers, 1985-10)
    B andV photometry of DM UMa obtained between January, 1980 and June, 1984 is presented. Analysis yields a mean photometric period 7d.478±0d.010, compared to the known oribital period of 7d.492±0d.009. Light curves obtained ...
  • HD 147010:The AP star in the reflection nebula vdB 102 in upper scorpius region 
    Kameswara Rao, N; Rajamohan, R (Indian Academy of Sciences, 1982-09)
    HD 147010, which is in the reflection nebula vdB 102, has been found to be a hot Ap silicon star rather than a normal A supergiant. From the UBV and JHK photometry of the star, color excess E(B-V) of 0.29 and the ratio of ...
  • Integrated parameters of open clusters 
    Pandey, A. K; Bhatt, B. C; Mahra, H. S; Sagar, R (Royal Astronomical Society, 1989-01)
    Integrated magnitudes and colors of population I synthetic clusters have been derived using theoretical evolutionary tracks and an age-dependednt initial mass function. A comparison of the theoretically obtained integrated ...
  • Photometry of EX Hya 
    Shylaja, B. S (Kluwer Academic Publishers, 1985-04)
    Photometric observations of EX Hya in B and V filters are reported. The 67 min modulation of the light curve is also found to be in good agreement with the results of earlier studies. The (B-V) colour variation with respect ...
  • A possible P-L relation for RR-Lyrae variables in globular clusters 
    Scaria, K. K (Kluwer Academic Publishers, 1984-08)
    A study of the mean photographic magnitudes of RR Lyrae variables in galactic globular clusters has shown that the luminosity of RR-ab variables decreases with period. It is found that RR-ab variables, in the cluster ω ...
  • Spectral classification at ultra-low dispersion 
    Rajamohan, R (D. Reidel Publishing Co., 1984-11)
    The accuracy of the ultralow-dispersion slitless-spectroscopy technique of Bappu and Parthasarathy (1977) in classifying early-type stars at great distances from the sun is investigated experimentally using a 5-min exposure ...

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