Strong chemical tagging with APOGEE: 21 candidate star clusters that have dissolved across the Milky Way disc

Simple item page
dc.contributor.authorPrice-Jones, Natalie
dc.contributor.authorBovy, Jo
dc.contributor.authorWebb, Jeremy J.
dc.contributor.authorPrieto, Carlos Allende
dc.contributor.authorBeaton, Rachael
dc.contributor.authorBrownstein, Joel R.
dc.contributor.authorCohen, Roger E.
dc.contributor.authorCunha, Katia
dc.contributor.authorDonor, John
dc.contributor.authorFrinchaboy, Peter M.
dc.contributor.authorGarcia-Hernandez, D. A.
dc.contributor.authorLane, Richard R.
dc.contributor.authorMajewski, Steven R.
dc.contributor.authorNidever, David L.
dc.contributor.authorRoman-Lopes, Alexandre
dc.date.accessioned2025-01-23T19:49:52Z
dc.date.available2025-01-23T19:49:52Z
dc.date.issued2020
dc.description.abstractChemically tagging groups of stars born in the same birth cluster is a major goal of spectroscopic surveys. To investigate the feasibility of such strong chemical tagging, we perform a blind chemical tagging experiment on abundances measured from APOGEE survey spectra. We apply a density-based clustering algorithm to the 8D chemical space defined by [Mg/Fe], [Al/Fe], [Si/Fe], [K/Fe], [Ti/Fe], [Mn/Fe], [Fe/H], and [Ni/Fe], abundances ratios which together span multiple nucleosynthetic channels. In a high-quality sample of 182 538 giant stars, we detect 21 candidate clusterswith more than 15 members. Our candidate clusters are more chemically homogeneous than a population of non-member stars with similar [Mg/Fe] and [Fe/H], even in abundances not used for tagging. Group members are consistent with having the same age and fall along a single stellar-population track in log g versus T-eff space. Each group's members are distributed over multiple kpc, and the spread in their radial and azimuthal actions increases with age. We qualitatively reproduce this increase using N-body simulations of cluster dissolution in Galactic potentials that include transient winding spiral arms. Observing our candidate birth clusters with high-resolution spectroscopy in other wavebands to investigate their chemical homogeneity in other nucleosynthetic groups will be essential to confirming the efficacy of strong chemical tagging. Our initially spatially compact but now widely dispersed candidate clusters will provide novel limits on chemical evolution and orbital diffusion in the Galactic disc, and constraints on star formation in loosely bound groups.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/staa1905
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/staa1905
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/100525
dc.identifier.wosidWOS:000574923200076
dc.issue.numero4
dc.language.isoen
dc.pagina.final5115
dc.pagina.inicio5101
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectmethods: data analysis
dc.subjectstars: abundances
dc.subjectstars: statistics
dc.subjectGalaxy: structure
dc.titleStrong chemical tagging with APOGEE: 21 candidate star clusters that have dissolved across the Milky Way disc
dc.typeartículo
dc.volumen496
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas