Based on observations made with European Southern Observatory Telescopes at the Paranal Observatory under programme ID 079.D-0178A.
A detailed spectroscopic analysis of the open cluster NGC 5460★
Article first published online: 15 FEB 2011
© 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS
Monthly Notices of the Royal Astronomical Society
Volume 413, Issue 2, pages 1132–1144, May 2011
How to Cite
Fossati, L., Folsom, C. P., Bagnulo, S., Grunhut, J. H., Kochukhov, O., Landstreet, J. D., Paladini, C. and Wade, G. A. (2011), A detailed spectroscopic analysis of the open cluster NGC 5460. Monthly Notices of the Royal Astronomical Society, 413: 1132–1144. doi: 10.1111/j.1365-2966.2011.18199.x
- Issue published online: 25 APR 2011
- Article first published online: 15 FEB 2011
- Accepted 2010 December 14. Received 2010 December 10; in original form 2010 November 10
- stars: abundances;
- open clusters and associations: individual: NGC 5460
Within the context of a large project aimed at studying early F-, A- and late B-type stars, we present the abundance analysis of the photospheres of 21 members of the open cluster NGC 5460, an intermediate-age cluster (log t∼ 8.2) previously not studied with spectroscopy. Our study is based on medium- and high-resolution spectra obtained with the Fibre Large Array Multi Element Spectrograph (FLAMES) instrument of the European Southern Observatory/Very Large Telescope. We show that cluster members have a nearly solar metallicity and that there is evidence that the abundances of magnesium and iron are correlated with the effective temperature, exhibiting a maximum around Teff= 10 500 K. No correlations are found between abundances and projected equatorial velocity, except for marginal evidence of barium being more abundant in slower than in faster rotating stars. We discovered two He-weak stars and a binary system where the hotter component is an HgMn star. We provide new estimates for the cluster distance (720 ± 50 pc), age (log t=8.2 ± 0.1) and mean radial velocity (−17.9 ± 5.2 km s−1).