CCD photometry of Galactic open clusters. II - NGC 2243

Details CCD photometry of Galactic open clusters. II - NGC 2243 CCD photometry of Galactic open clusters. II - NGC 2243

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.245...15b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 245, July 1, 1990, p. 15-29. Research supported by MPI

Astronomy and Astrophysics

Astronomy

40

Astronomical Photometry, Charge Coupled Devices, Color-Magnitude Diagram, Open Clusters, Stellar Evolution, Stellar Models, Binary Stars, Blue Stars, Horizontal Branch Stars, Main Sequence Stars, Metallicity, Red Giant Stars

Scientific paper

New CCD photometry is presented for 607 stars in the old open cluster NGC 2243. The resulting C-M diagram is used to show that at least 30 percent of the total population is binary stars. Also, the observations show a gap just below the top of the main sequence, six blue straggler condidates, and an incipient red horizontal branch. Observed and synthetic C-M diagrams are compared and used to determine the main parameters of NGC 2243.

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