J/A+A/699/L5 Solar neighborhood clusters in moving-groups (Swiggum+, 2025)
From moving groups to star formation in the solar neighborhood.
Swiggum C., Alves J., D'Onghia E.
<Astron. Astrophys. 699, L5 (2025)>
=2025A&A...699L...5S 2025A&A...699L...5S (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Associations, stellar ; Space velocities
Keywords: Galaxy: kinematics and dynamics -
open clusters and associations: general - solar neighborhood -
Galaxy: structure
Abstract:
Moving groups in the solar neighborhood are ensembles of co-moving
stars, likely originating from spiral-arm resonances, the Galactic
bar, or external perturbations. Their co-movement with young clusters
indicates recent star formation, but a lack of precise 3-D positions
and velocities has obscured the connection. Using backward-orbit
integrations of 509 clusters within ∼1kpc -- based on Gaia DR3 and
supplemented with APOGEE-2 and GALAH DR3 radial velocities -- we trace
their evolution over the past 100Myr. Most clusters separate into
three spatial branches that trace the Pleiades, Coma Berenices, and
Sirius moving groups; no analogous branch is seen for the Hyades
group. Clusters belonging to the Alpha Persei, Messier 6, and
Collinder 135 families, previously shown to have formed in three
massive star-forming complexes, commove with either the Pleiades
(Alpha Persei, Messier 6) or Coma Berenices (Collinder 135). Our
results sharpen the view of how large-scale Galactic dynamics shape
nearby star formation. The cluster sample is drawn from the
young-cluster catalogue of Hunt & Reffert (2023A&A...673A.114H 2023A&A...673A.114H, Cat.
J/A+A/673/A114).
Description:
The table below lists heliocentric Cartesian positions (x, y, z),
space velocities (U, V, W), their 1-sigma uncertainties, literature
ages, a membership probability weight, and an assigned moving-group
label for each of the 509 clusters. Positive axes follow a right-handed
frame: +x toward the Galactic Centre, +y in the direction of Galactic
rotation, +z toward the North Galactic Pole.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
clusters.dat 130 509 Cluster parameters
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See also:
J/A+A/673/A114 : Improving the open cluster census. II. (Hunt+, 2023)
J/A+A/686/A42 : Improving the open cluster census. III. (Hunt+, 2024)
Byte-by-byte Description of file: clusters.dat
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Bytes Format Units Label Explanations
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1- 17 A17 --- Name Cluster identifier (catalogue name)
19- 26 F8.3 Myr Age Log-linear age estimate (Hunt & Reffert,
2023, Cat. J/A+A/673/A114)
28- 35 F8.3 pc X Heliocentric Cartesian X
37- 44 F8.3 pc Y Heliocentric Cartesian Y
46- 53 F8.3 pc Z Heliocentric Cartesian Z
55- 61 F7.3 km/s U Velocity toward Galactic Centre
63- 69 F7.3 km/s V Velocity in direction of Galactic rotation
71- 77 F7.3 km/s W Velocity toward North Galactic Pole
79- 84 F6.3 pc e_X 1-sigma uncertainty on x
86- 91 F6.3 pc e_Y 1-sigma uncertainty on y
93- 97 F5.3 pc e_Z 1-sigma uncertainty on z
99-103 F5.3 km/s e_U 1-sigma uncertainty on U
105-109 F5.3 km/s e_V 1-sigma uncertainty on V
111-115 F5.3 km/s e_W 1-sigma uncertainty on W
117-121 F5.3 --- Pmemb [0/1] Membership-confidence weight
123-130 A8 --- Group Assigned moving-group name (or blank)
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Acknowledgements:
Cameren Swiggum, cameren.swiggum (at) univie.ac.at
(End) Patricia Vannier [CDS] 16-Jun-2025