Open AccessAbundance analysis of four members of the metal‐rich open cluster NGC 6253 ★
Author(s) -
Montalto M.,
Santos N. C.,
Villanova S.,
Pace G.,
Piotto G.,
Desidera S.,
De Marchi F.,
Pasquini L.,
Saviane I.
Publication year - 2012
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2012.21040.x
Subject(s) - physics , metallicity , astrophysics , stars , open cluster , blue straggler , spectral line , cluster (spacecraft) , astronomy , main sequence , abundance (ecology) , giant star , star cluster , fishery , computer science , biology , programming language
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.