摘要：IC 166 is an intermediate-age open cluster (OC) (∼1Gyr) that lies in the transition zone of the metallicity gradient inthe outer disk. Its location, combined with our very limited knowledge of its salient features, make it an interestingobject of study. We present the first high-resolution spectroscopic and precise kinematical analysis of IC 166, whichlies in the outer disk with R GC ∼12.7kpc. High-resolution H-band spectra were analyzed using observations fromthe SDSS-IV Apache Point Observatory Galactic Evolution Experiment survey. We made use of the BrusselsAutomatic Stellar Parameter code to provide chemical abundances based on a line-by-line approach for up to eightchemical elements (Mg, Si, Ca, Ti, Al, K, Mn, and Fe). The α-element (Mg, Si, Ca, and whenever available Ti)abundances, and their trends with Fe abundances have been analyzed for a total of 13 high-likelihood clustermembers. No significant abundance scatter was found in any of the chemical species studied. Combining thepositional, heliocentric distance, and kinematic information, we derive, for the first time, the probable orbit of IC 166within a Galactic model including a rotating boxy bar, and found that it is likely that IC 166 formed in the Galacticdisk, supporting its nature as an unremarkable Galactic OC with an orbit bound to the Galactic plane.
关键词：Galaxy: abundances;Galaxy: kinematics and dynamics;open clusters and associations: individual (IC 166)
