DTGs of metal-poor stars. II. RAVE DR6

DOI

Orbital characteristics based on Gaia Early Data Release 3 astrometric parameters are analyzed for ~8000 metal-poor stars ([Fe/H]<=-0.8) compiled from the Radial Velocity Experiment (RAVE) Data Release 6. Selected as metal-poor candidates based on broadband photometry, RAVE collected moderate-resolution (R~7500) spectra in the region of the Ca triplet for these stars. About 20% of the stars in this sample also have medium-resolution (1200<~R<~2000) validation spectra obtained over a 4yr campaign from 2014 to 2017 with a variety of telescopes. We match the candidate stars to photometric metallicity determinations from the Huang+ 2022ApJ...925..164H recalibration of the SkyMapper Southern Survey Data Release 2. We obtain dynamical clusters of these stars from the orbital energy and cylindrical actions using the HDBSCAN unsupervised learning algorithm. We identify 179 dynamically tagged groups (DTGs) with between 5 and 35 members; 67 DTGs have at least 10 member stars. Milky Way (MW) substructures such as Gaia-Sausage-Enceladus, the Metal-weak Thick Disk, the Splashed Disk, Thamnos, the Helmi Stream, and LMS-1 (Wukong) are identified. Associations with MW globular clusters are determined for 10 DTGs; no recognized MW dwarf galaxies were associated with any of our DTGs. Previously identified dynamical groups are also associated with our DTGs, with emphasis placed on their structural determination and possible new identifications. We identify chemically peculiar stars as members of several DTGs; we find 22 DTGs that are associated with r-process-enhanced stars. Carbon-enhanced metal-poor (CEMP) stars are identified among the targets with available spectroscopy, and we assign these to morphological groups following the approach given by Yoon+ 2016, J/ApJ/833/20.

Cone search capability for table J/ApJS/261/19/table2 (*Stellar members of the DTGs identified by HDBSCAN)

Cone search capability for table J/ApJS/261/19/table8 (Initial from the RAVE survey)

Cone search capability for table J/ApJS/261/19/table9 (Final from the RAVE survey)

Cone search capability for table J/ApJS/261/19/table10 (Identified carbon-enhanced metal-poor (CEMP) stars and their group association)

Identifier
DOI http://doi.org/10.26093/cds/vizier.22610019
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJS/261/19
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/261/19
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/261/19
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJS/261/19
Provenance
Creator Shank D.; Komater D.; Beers T.C.; Placco V.M.; Huang Y.
Publisher CDS
Publication Year 2022
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Exoplanet Astronomy; Galactic and extragalactic Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy