Binary clusters in the Galactic I: systematic identification and classification using Gaia DR3

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Volume 702 (October 2025)

A&A, 702 (2025) A48

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Table 3

Open cluster group candidates.

Groups	Pairs	ID_HR24	Cluster	α	δ	ϖ	$μ_{α}^{}$ $\[\mu_\alpha^\]$	μ_δ	RV	logt	DM	E(B − V)
				deg	deg	mas	mas yr⁻¹	mas yr⁻¹	km s⁻¹		mag	mag
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)	(11)	(12)	(13)
1	5	6925	UBC_17a	84.78	−1.93	2.77	1.80	−1.30	11.74	6.50	8.58	0.13
1	320	5102	OCSN_61	84.08	−0.40	2.59	−1.04	−0.63	26.82	7.43	7.53	0.01
1	5	11	ASCC_19	81.98	−1.86	2.81	1.17	−1.18	11.65	7.11	7.91	0.11
2	2	7	ASCC_12	72.42	41.71	0.95	−0.68	−2.92	−26.14	8.02	11.09	0.33
2	2	4203	HXHWL_18	74.32	39.80	0.96	−0.53	−3.06	−9.60	7.55	10.68	0.31
2	190	2851	HSC_1308	76.51	38.47	0.95	−0.36	−3.13	−16.74	7.51	11.40	0.55
2	40	326	COIN-Gaia_39	69.58	42.97	0.97	0.10	−2.54	7.96	8.31	10.75	0.34
2	40	300	COIN-Gaia_10	68.46	40.50	0.95	1.97	−3.45	8.09	7.88	11.50	0.53
...	...	...	...	...	...	...	...	...	...	...	...	...

Notes. Column (1): Group IDs. Column (2): Pair IDs. Column (3): Cluster IDs from Hunt & Reffert (2024). Column (4): Cluster names. Columns (5)–(10) are adopted from HR24, with all values referenced to epoch J2016.0. Columns (11)–(13) are derived in this work (see also Table 2). The full table is available at the CDS. Here we only show the first two OC groups.

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