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Poovelil_2020_ApJ_903_55.pdf
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Final Published Version
Author
Poovelil, Vijith JacobZasowski, G.
Hasselquist, S.
Seth, A.
Donor, John
Beaton, Rachael L.
Cunha, K.
Frinchaboy, Peter M.
García-Hernández, D. A.
Hawkins, K.
Kratter, K. M.
Lane, Richard R.
Nitschelm, C.
Affiliation
Univ Arizona, Steward ObservUniv Arizona, Dept Astron
Issue Date
2020-11-02
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IOP PUBLISHING LTDCitation
Poovelil, V. J., Zasowski, G., Hasselquist, S., Seth, A., Donor, J., Beaton, R. L., ... & Nitschelm, C. (2020). Open Cluster Chemical Homogeneity throughout the Milky Way. The Astrophysical Journal, 903(1), 55.Journal
ASTROPHYSICAL JOURNALRights
© 2020. The American Astronomical Society. All rights reserved.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
The chemical homogeneity of surviving stellar clusters contains important clues about interstellar medium (ISM) mixing efficiency, star formation, and the enrichment history of the Galaxy. Existing measurements in a handful of open clusters suggest homogeneity in several elements at the 0.03.dex level. Here we present (i) a new cluster member catalog based only on APOGEE radial velocities and Gaia-DR2 proper motions, (ii) improved abundance uncertainties for APOGEE cluster members, and (iii) the dependence of cluster homogeneity on Galactic and cluster properties, using abundances of eight elements from the APOGEE survey for 10 high-quality clusters. We find that cluster homogeneity is uncorrelated with Galactocentric distance, Z| |, age, and metallicity. However, velocity dispersion, which is a proxy for cluster mass, is positively correlated with intrinsic scatter at relatively high levels of significance for [Ca/Fe] and [Mg/Fe]. We also see a possible positive correlation at a low level of significance for [Ni/Fe], [Si/Fe], [Al/Fe], and [Fe/H], while [Cr/Fe] and [Mn/Fe] are uncorrelated. The elements that show a correlation with velocity dispersion are those that are predominantly produced by core-collapse supernovae (CCSNe). However, the small sample size and relatively low correlation significance highlight the need for follow-up studies. If borne out by future studies, these findings would suggest a quantitative difference between the correlation lengths of elements produced predominantly by Type.Ia SNe versus CCSNe, which would have implications for Galactic chemical evolution models and the feasibility of chemical tagging.ISSN
0004-637XEISSN
1538-4357Version
Final published versionae974a485f413a2113503eed53cd6c53
10.3847/1538-4357/abb93e