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Browsing Publications of Astronomical Society of India by Subject "Open cluster"

Browsing Publications of Astronomical Society of India by Subject "Open cluster"

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  • The age distribution of open clusters as a function of Trumpler's classification 
    Bhatt, B. C; Pandey, A. K; Mahra, H. S (Astronomical Society of Indian, 1989-03)
    The age distribution of open clusters is studied as a function of Trumpler's central concentration and range in brightness classes. For different Trumpler's classes within 1 kpc, it is shown that the observed distribution ...
  • An Analysis of Proper Motion and Membership Probability in Open Clusters 
    Sagar, R (Astronomical Society of Indian, 1987-12)
    An analysis of the proper motion data and membership probability has been carried out for nine open clusters. The effects of observational errors on the parameters characterzing the frequency distributions of cluster and ...
  • CCD photometry of galactic open star clusters -- 2: NGC 7419 
    Bhatt, B. C; Pandey, A. K; Mohan, V; Mahra, H. S; Paliwal, D. C (Astronomical Society of India, 1993-03)
    CCD photometric observations of open cluster NGC 7419 in UBVRI passbands have been made down to V = 19.5 mag. Reddening across the cluster region is found to be variable. The mean visual absorption of 5.30 mag and a distance ...
  • CCD photometry of galactic open star clusters IV. NGC 366 
    Pandey, A. K; Bhatt, B. C; Mohan, V; Paliwal, D. C; Mahra, H. S (Astronomical Society of India, 1994)
  • CCD photometry of galactic open star clusters-III. NGC 1931 
    Bhatt, B. C; Pandey, A. K; Mahra, H. S; Paliwal, D. C (Astronomical Society of India, 1994)
  • Field star contamination in open star cluster NGC 2301 
    Mohan, V; Sagar, R (Astronomical Society of Indian, 1988-12)
    Photographic photometry of about 900 stars down to V = 17 mag has been carried out in the region of the open cluster NGC 2301. The cluster region seems to be severely contaminated by field stars. Statistical criteria yield ...
  • Internal motions in the open star clusters NGC 654 and 6087 
    Sagar, R; Bhatt, H. C (Astronomical Society of Indian, 1989-03)
    Proper motion measurements are used to study the internal kinematics in the open star clusters NGC 654 and 6087. It is found that intrinsic dispersions are independent of stellar mass and radial distance in both clusters. ...
  • NGC 1245 - an intermediate age open cluster 
    Subramaniam, A (Astronomical Society of India, 2003)
    The B, V CCD photometry of 916 stars in the field of the high galactic latitude intermediate age open cluster NGC 1245 is presented. The cluster parameters were estimated with the help of V vs(B-V) colour magnitude diagram ...
  • Photometry of open cluster STOCK 17 
    Pandey, A. K (Astronomical Society of Indian, 1986-03)
    Photoelectric magnitudes of 10 stars in the field of Stock 17 have been obtained. The reddening is uniform across the cluster. A distance of 2.12 kpc has been estimated for the cluster. It is concluded that the age of the ...
  • Star formation in the region of young open cluster - NGC 225 
    Subramaniam, A; Mathew, B; Sreeja S. K (Astronomical Society of India, 2006-12)
    NGC 225 is believed to be a 120 Myr old open cluster located at tilda 650 pc. Eight stars with H alphaemission are found to be located around the cluster, of which two are probable Herbig Be stars, indicating a very young ...
  • Study of Old Open Clusters NGC 1605, Czernik 18, NGC 2509 
    Sujatha, S; Babu, G. S. D (Astronomical Society of India, 2003)
    We present the first CCD photometric UBVRI observations of three open clusters NGC 1605 (OCI 406), Czernik 18 (OCI 426) and NGC 2509 (OCI 630) obtained by using the 1.02 m telescope at Vainu Bappu Observatory, Kavalur. ...
  • Study of open cluster NGC 2509. 
    Sujatha, S; Babu, G. S. D (Astronomical Society of India, 2003)
    We present the first CCD photometric observations of the open cluster ocl 630 (NGC 2509) in UBVRI filters. It is a fairly nearby cluster at a distance of 912±15 pc, and is placed in the direction of the Puppis constellation ...
  • UBV photoelectric photometry of the open cluster NGC 2539 
    Joshi, U. C; Sagar, R (Astronomical Society of Indian, 1986-06)
    UBV photometric observations of 135 stars near NGC 2539, obtained using the 104-cm Sampurnanand reflector at Uttar Pradesh State Observatory during 1975-1978, are reported. The data are presented in tables and graphs and ...
  • Variable stars in the old galactic cluster M67 
    Rajamohan, R; Bhattacharyya, J. C; Subramanian, V; Kuppuswamy, K (Astronomical Society of Indian, 1988-12)
    Schmidt plates of the old open galactic cluster M67 were obtained on twelve nights to find the most probable variables in the cluster. The Sabattier technique was used to derive the magnitudes of the cluster members. The ...

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