High-resolution spectroscopy of giant stars in the open clusters IC 4651 and IC 4725

作者：Katime Santrich Orlando J; Rossi Silvia

来源：Canadian Journal of Physics, 2017, 95(9): 862-868.

DOI：10.1139/cjp-2016-0912

• stellar evolution
• stellar abundances
• stellar open clusters and associations
• stellar fundamental parameters
• stellar atmospheres

Open clusters are important astrophysical laboratories to study the stellar formation and evolution and to verify the disk structure of the Milky Way. We present calculations of stellar atmospheric parameters and s-process abundances for nine giant stars in the galactic open clusters IC 4651 and IC 4725. These objects have their memberships confirmed from dynamic studies and chemical analysis. The high-resolution spectra are available in the FEROS ESO archive. We have applied a line by line analysis relative to Juno solar spectrum to determine the stellar atmospheric parameters and chemical abundances of Y II, Zr I, La II, Ce II, and Nd II under the local thermal equilibrium hypothesis. The obtained results were compared to the literature values. The derived s-process abundance pattern agrees with the most recent behaviors reported for giant stars in galactic open clusters.

• 出版日期2017-9