Bibcode
Donor, J.; Frinchaboy, Peter M.; Cunha, Katia; Thompson, Benjamin; O’Connell, Julia; Zasowski, Gail; Jackson, Kelly M.; Meyer McGrath, Brianne; Almeida, Andrés; Bizyaev, Dmitry; Carrera, Ricardo; García-Hernández, D. A.; Nitschelm, Christian; Pan, Kaike; Zamora, O.
Bibliographical reference
The Astronomical Journal, Volume 156, Issue 4, article id. 142, 14 pp. (2018).
Advertised on:
10
2018
Citations
54
Refereed citations
52
Description
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]).
Related projects
Nucleosynthesis and molecular processes in the late stages of Stellar Evolution
Low- to intermediate-mass (M < 8 solar masses, Ms) stars represent the majority of stars in the Cosmos. They finish their lives on the Asymptotic Giant Branch (AGB) - just before they form planetary nebulae (PNe) - where they experience complex nucleosynthetic and molecular processes. AGB stars are important contributors to the enrichment of the
Domingo Aníbal
García Hernández