The Open Cluster Chemical Abundances and Mapping ( OCCAM ) survey aims to produce a comprehensive , uniform , infrared-based spectroscopic dataset for hundreds of open clusters , and to constrain key Galactic dynamical and chemical parameters from this sample .
This second contribution from the OCCAM survey presents analysis of 259 member stars with [ Fe/H ] determinations in 19 open clusters , using Sloan Digital Sky Survey Data Release 14 ( SDSS/DR14 ) data from the Apache Point Observatory Galactic Evolution Experiment ( APOGEE ) and ESA Gaia .
This analysis , which includes clusters with R _ { GC } ranging from 7 to 13 kpc , measures an [ Fe/H ] gradient of -0.061 \pm 0.004 dex kpc ^ { -1 } .
We also confirm evidence of a significant positive gradient in the \alpha -elements ( [ O/Fe ] , [ Mg/Fe ] , and [ Si/Fe ] ) and present evidence for a significant negative gradient in iron-peak elements ( [ Mn/Fe ] and [ Ni/Fe ] ) .