IIA Institutional Repository

Browsing IIAP Publications by Subject "Open Clusters"

Browsing IIAP Publications by Subject "Open Clusters"

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  • A deep BVI photometric study of the open cluster NGC 2453 
    Mallik, D. C. V; Sagar, R; Pati, A. K (EDP Sciences, 1995-12)
    CCD observations of the open cluster NGC 2453 have been carried out in B, V and I passbands. A total of 356 stars have been observed in a field of about 4'x6' of the sky centred on the cluster. Colour-magnitude diagrams ...
  • Detection of a branching-off feature from the Cygnus-Orion arm in the direction of Carina 
    Babu, G. S. D (Elsevier Science B.V., 1988)
    A program is presented for the study of faint young open clusters in the anticenter direction of the Galaxy with the aim of using these clusters as spiral arm tracers. Twelve open clusters are selected for observation. ...
  • Detection of solar-like oscillations from Kepler photometry of the open cluster NGC 6819 
    Stello, D; Basu, S; Bruntt, H; Mosser, B; Stevens, I. R; Brown, T. M; Christensen-Dalsgaard, J; Gilliland, R. L; Kjeldsen, H; Arentoft, T; Ballot, J; Barban, C; Bedding, T. R; Chaplin, W. J; Elsworth, Y. P; Garcia, R. A; Goupil, M. J; Hekker, S; Huber, D; Mathur, S; Meibom, S; Samadi, R; Sangaralingam, V; Baldner, C. S; Belkacem, K; Biazzo, K; Brogaard, K; Suarez, J. C; D'Antona, F; Demarque, P; Esch, L; Gai, N; Grundah, F; Lebreton, Y; Jiang, B; Jevtic, N; Karoff, C; Miglio, A; Molenda-Zakowicz, J; Montalban, J; Noels, A; Roca Cortes, T; Roxburgh, I. W; Serenelli, A. M; Silva, V; Christiaan Sterken, A; Stine, P; Szabo, R; Weiss, A; Borucki, W. J; Koch, D; Jenkins, J. M (Institute of Physics, 2010-04)
    Asteroseismology of stars in clusters has been a long-sought goal because the assumption of a common age, distance and initial chemical composition allows strong tests of the theory of stellar evolution. We report results ...
  • 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 ...
  • 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 ...
  • Integrated photometric characteristics of galactic open star clusters 
    Lata, S; Pandey, A. K; Sagar, R; Mohan, V (E D P Sciences, 2002-06)
    Integrated UBVRI photometric parameters of 140 galactic open clusters have been computed. Integrated I(V-R)0 and I(V-I)0 colours as well as integrated parameters for 71 star clusters have been obtained for the first time. ...
  • Kinematical distances to open star clusters 
    Sagar, R; Bhatt, H. C (Indian Academy Sciences, 1988-06)
    Kinematical distances are estimated for six open star clusters. They agree fairly well with the photometric distances. The kinematical distances cannot, at present, be estimated better than the photometric distances. When ...
  • Photometric calibration of the CCD camera of 1-m telescope at VBO 
    Mayya, Y. D (Indian Academy of Sciences, 1991-12)
    Calibration of the CCD camera of the 1-m telescope at the Vainu Bappu Observatory, Kavalur, to the BVR system is reported here based on the observations of stars in the 'dipper asterism' in the open cluster M 67 (NGC 2682). ...
  • A study of the open cluster NGC 2374 
    Babu, G. S. D (Indian Academy of Sciences, 1985-03)
    The results of modified objective grating observations and photoelectric as well as photographic photometry of the open cluster NGC 2374 are presented. The cluster contains at least twenty stars as definite members down ...
  • A study of the spatial stellar mass distribution in some young open clusters 
    Sagar, R; Miakutin, V. I; Piskunov, A. E; Dluzhnevskaia, O. B (Royal Astronomical Society, 1988-10)
    The stellar spatial distribution is studied as a function of mass in 11 young open clusters. In seven of these clusters, mass segregation is observed. The possibility of two cluster centers for NGC 2264 is discussed. It ...
  • A study of the spatial variation of mass functions in some young open clusters 
    Pandey, A. K; Mahra, H. S; Sagar, R (Astronomical Society of the Pacific, 1991)
    The effect of mass segregation on cluster mass functions has been studied and it is found that the slope of the mass function is steeper in the outer parts of open dusters. Since dynamical relaxation time is always larger ...
  • Study of the Wolf-Rayet members of the cluster NGC 6231 
    Shylaja, B. S (Indian Academy Sciences, 1988-09)
    Two Wolf-Rayet members of the cluster NGC 6231 are studied spectrophotometrically. HD 151932, a suspected variable, shows variations in the emission line flux as well as continuum magnitude measurements. An attempt is made ...

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