CCD photometry of galactic clusters containing Cepheid variables. IV - NGC 6649

Details CCD photometry of galactic clusters containing Cepheid variables. IV - NGC 6649 CCD photometry of galactic clusters containing Cepheid variables. IV - NGC 6649

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.224...61w&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 224, Jan. 1, 1987, p. 61-74.

Astronomy and Astrophysics

Astronomy

20

Astronomical Photometry, Cepheid Variables, Charge Coupled Devices, Galactic Clusters, Stellar Magnitude, Error Analysis, Open Clusters, Photometry, Pleiades Cluster, Radial Velocity

Scientific paper

A colour magnitude diagram to V = 20 is given for 395 stars in the heavily reddened open cluster NGC 6649. The absorption-corrected distance modulus is 11.00±0.15 mag (1585±110 pc) assuming R(OB) = 3.27±0.10 for NGC 6649 and based on a ZAMS with zero point referenced to a Pleiades distance modulus of 5.56 mag. The range of reddening over the 5 arcmin diameter of the cluster is ΔE(B-V) = 0.3 mag. NGC 6649 contains the double mode Cepheid V367 Sct, which has = -3.80±0.06 and - = 0.58±0.02.

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