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Galactic archaeology and minimum spanning trees

MacFarlane, Ben A.; Gibson, Brad K.; Flynn, Chris M. L.


Chris M. L. Flynn

Ben A. MacFarlane


I. Skillen

M. Balcells

S.C. Trager


Chemical tagging of stellar debris from disrupted open clusters and associations underpins the science cases for next-generation multi-object spectroscopic surveys. As part of the Galactic Archaeology project TraCD (Tracking Cluster Debris), a preliminary attempt at reconstructing the birth clouds of now phase-mixed thin disk debris is undertaken using a parametric minimum spanning tree (MST) approach. Empirically-motivated chemical abundance pattern uncertainties (for a 10-dimensional chemistry-space) are applied to NBODY6-realised stellar associations dissolved into a background sea of field stars, all evolving in a Milky Way potential. We demonstrate that significant population reconstruction degeneracies appear when the abundance uncertainties approach 0.1 dex and the parameterised MST approach is employed; more sophisticated methodologies will be required to ameliorate these degeneracies.

Book Type Book Chapter
Publication Date 2015
Journal Multi-object spectroscopy in the next decade
Publisher Astronomical Society of the Pacific
Peer Reviewed Not Peer Reviewed
Volume 507
Pages 79-83
Series Title Astronomical Society of the Pacific Conference Series
Book Title Multi-Object Spectroscopy in the Next Decade: Big Questions, Large Surveys, and Wide Fields
ISBN 9781583818985
Keywords Galactic archaeology, Stellar debris
Publisher URL Published chapter available at
Copyright Statement ©2017 University of Hull


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