The Open Cluster Chemical Abundances and Mapping Survey. II. Precision Cluster Abundances for APOGEE Using SDSS DR14

John Donor, Peter M. Frinchaboy, Katia Cunha, Benjamin Thompson, Julia O'Connell, Gail Zasowski, Kelly M. Jackson, Brianne Meyer McGrath, Andrés Almeida, Dmitry Bizyaev, Ricardo Carrera, D. A. Garcia-Hernández, Christian Nitschelm, Kaike Pan, Olga Zamora

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

The Open Cluster Chemical Abundances and Mapping (OCCAM) survey aims to produce a comprehensive, uniform, infrared-based spectroscopic data set 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 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 ± 0.004 dex kpc-1. We also confirm evidence of a significant positive gradient in the α-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]).

Original languageEnglish (US)
Article number142
JournalAstronomical Journal
Volume156
Issue number4
DOIs
StatePublished - Oct 2018
Externally publishedYes

Keywords

  • Galaxy: abundances
  • Galaxy: disk
  • Galaxy: evolution
  • open clusters and associations: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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