Based on observations collected at the European Organization for Astronomical Research in the Southern Hemisphere (ESO) in Paranal during programme 381.C-0270(A).
Abundance analysis of four members of the metal-rich open cluster NGC 6253★
Article first published online: 13 JUN 2012
© 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS
Monthly Notices of the Royal Astronomical Society
Volume 423, Issue 4, pages 3039–3048, July 2012
How to Cite
Montalto, M., Santos, N. C., Villanova, S., Pace, G., Piotto, G., Desidera, S., De Marchi, F., Pasquini, L. and Saviane, I. (2012), Abundance analysis of four members of the metal-rich open cluster NGC 6253. Monthly Notices of the Royal Astronomical Society, 423: 3039–3048. doi: 10.1111/j.1365-2966.2012.21040.x
- Issue published online: 4 JUL 2012
- Article first published online: 13 JUN 2012
- Accepted 2012 April 2. Received 2012 April 2; in original form 2011 September 5
- techniques: spectroscopic;
- stars: abundances;
- open clusters and associations: individual: NGC 6253
We report on VLT/UVES high-resolution spectra of four members of the old metal-rich open cluster NGC 6253: a main-sequence star, two red-clump stars and a blue straggler. We performed equivalent width analysis and derived Fe, Si, Ca, Ti, Cr and Ni abundances as well as abundance ratios. For our main-sequence star, we obtained a metallicity of (rms), whereas for the two giants we found that our metallicities are on average +0.19 ± 0.13 (rms), lower than what was determined for the same stars in previous studies. We also found that, within the uncertainties, the abundance ratios of α and iron-peak elements match those in the solar surroundings, with the possible exception of Si in two giant stars in our sample.