Membership, binarity and metallicity of red giants in the open cluster NGC 6134

Details Membership, binarity and metallicity of red giants in the open cluster NGC 6134 Membership, binarity and metallicity of red giants in the open cluster NGC 6134

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26as...95..429c&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 95, no. 3, p. 429-436.

Astronomy and Astrophysics

Astrophysics

20

Binary Stars, Metallicity, Open Clusters, Red Giant Stars, Abundance, Color-Color Diagram, Color-Magnitude Diagram, Radial Velocity, Stellar Spectrophotometry, Ubv Spectra

Scientific paper

Coravel radial velocity measurements and photometry in the UBV and CMT1T2 systems of 24 red giants, supplemented by DDO observations of 11 stars, in the field of the open cluster NGC 6134 are analyzed for membership determination and binary detection. We have found 17 red giant members, and discovered six spectroscopic binaries. Two more stars are suspected of being long-period, low-amplitude binaries. The mean cluster radial velocity is equal to -26.0 +/- 0.24 km/s. A reddening of E(B-V) = 0.35 +/- 0.02, and a distance of about 760 pc have been obtained from the photometric analysis of the red giants. The weighted mean value of Fe/H = 0.05 +/- 0.12 is based on the UV excesses, the Fe-sensitive, and CN-contaminated abundance indices of the Washington system, and on the DDO cyanogen anomalies.

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