A study of the extinction in the young open cluster NGC 6823

Details A study of the extinction in the young open cluster NGC 6823 A study of the extinction in the young open cluster NGC 6823

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jrasc..73...74t&link_type=abstract

Journal of the Royal Astronomical Society of Canada, vol. 73, Apr. 1979, p. 74-89. Research supported by the National Research

Astronomy and Astrophysics

Astronomy

24

Interstellar Extinction, Open Clusters, Stellar Spectrophotometry, Ubv Spectra, Astronomical Photography, Electrophotometers, Spectrum Analysis

Scientific paper

Extinction in the young open star cluster NGC 6823 is studied on the basis of available UBV photometry and spectroscopic observations of 24 cluster stars. The reddening law for cluster members is found to be consistent with a straight line of slope E(U-B)/E(B-V) = 0.72. Available observational data are summarized for members of the Vul OB1 association, which appears to be physically related to NGC 6823, and it is shown that the data for NGC 6823 trapezium stars are in excellent agreement with the R = 3.0 relation previously derived for Vul OB1. It is concluded that a normal extinction law is applicable to most stars in NGC 6823.

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