Abstract
We present U B V I CCD photometric observations obtained in the field of open clusters SAI 63 and SAI 75. CCD optical data obtained for the first time for these clusters are used to derive the fundamental parameters of the clusters. Stellar surface density profile indicates that radii of SAI 63 and SAI 75 are ∼3′.5 and 2′.5 respectively. The reddenings E(B−V) are 0.44±0.05 and 0.34±0.05 mag for SAI 63 and SAI 75 respectively while the corresponding distances are 2.2 ± 0.2 and 3.5±0.3 kpc. An age of 450 ± 50 Myr for SAI 63 and 90 ± 10 Myr for SAI 75 is determined using the theoretical isochrones of Z=0.019. Our analysis shows that reddening law is normal towards SAI 75.
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IRAF is distributed by the National Optical Astronomical Observatory which are operated by the Association of Universities for Research in Astronomy, under contract with the National Science Foundation.
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Acknowledgements
This work has been financially supported by the Department of Science and Technology India (Project No. INT/RFBR/P-40) and by the Russian Foundation for Basic Research (Project No. 09-02-92669-IND-a). The authors are grateful to Mr. Devesh P. Sariya for his help during observations. This publication makes use of data products from the Two-Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/ California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation.This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France.
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Yadav, R.K.S., Leonova, S.I., Sagar, R. et al. Multicolour CCD Photometric Study of Galactic Star Clusters SAI 63 and SAI 75. J Astrophys Astron 35, 143–156 (2014). https://doi.org/10.1007/s12036-014-9302-0
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DOI: https://doi.org/10.1007/s12036-014-9302-0