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Study of the open cluster NGC 6546 and cepheid AV Sgr
1978
Publications of the Astronomical Society of the Pacific
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The 15.4-day cepheid AV Sgr has been suggested as a possible member of the open cluster NGC 6546. In order to investigate this possibility, we obtained new spectroscopic, radial velocity, and photometric data at Cerro Tololo Inter-American Observatory. From these data we find a distance to the cluster of 1.20 ± 0.12 kpc, considerable differential reddening with a mean color excess E B _ V = 0.72 ± 0.14 (s.d.), and earliest spectral type ~ B2. This places it on the outer edge of the -I spiral
doi:10.1086/130423
fatcat:qfvqorortrb2pnzvtlskaoxlny