A study of newly discovered close binary open cluster candidates in the Milky Way from Gaia DR3

Open Access

Table 3

One-dimensional velocity dispersions (σ₁_D) and velocity dispersions needed for the virial equilibrium (σ_vir10 and σ_vir5) of the 26 cluster candidates.

Cluster	σ_1D [km/s]	Eσ_1D [km/s]	$\sqrt{2} σ_{v i r 10}$ $\sqrt{2}\sigma_{\rm vir10}$ [km/s]	$\sqrt{2} σ_{v i r 5}$ $\sqrt{2}\sigma_{\rm vir5}$ [km/s]	Status	Cluster	σ_1D [km/s]	Eσ_1D [km/s]	$\sqrt{2} σ_{v i r 10}$ $\sqrt{2}\sigma_{\rm vir10}$ [km/s]	$\sqrt{2} σ_{v i r 5}$ $\sqrt{2}\sigma_{\rm vir5}$ [km/s]	Status
ADS16795	1.35	0.12	1.11	1.57	O	HSC976	4.19	0.07	1.94	2.74	U
ASCC100	0.71	0.13	1.63	2.31	B	HSC534	0.47	0.21	1.02	1.44	B
BDSB93	1.35	0.84	0.85	1.20	B	HSC1740	1.08	0.94	0.60	0.84	B
CWNU1024	0.89	0.14	2.62	3.70	B	OCSN82	0.55	0.19	2.30	3.25	B
CWNU1173	2.07	0.30	2.00	2.82	B	CWNU1256	1.15	0.24	1.49	2.11	B
CWNU2666	0.88	0.56	0.77	1.10	B	HSC224	1.21	0.69	1.04	1.48	B
HSC189	0.50	0.09	1.49	2.10	B	UPK24	0.65	0.20	1.72	2.44	B
HSC477	1.37	0.04	0.97	1.37	O	HSC759	1.36	0.04	2.44	3.45	B
HSC1630	2.55	0.06	0.90	1.28	U	HSC1644	0.69	0.07	0.71	1.01	B
HSC1897	0.81	0.37	1.13	1.60	B	HSC1911	0.95	0.18	0.82	1.16	B
HSC2204	4.89	1.33	0.50	0.71	U	OC0508	7.98	1.26	0.83	1.18	U
HSC2468	1.00	0.02	2.96	4.19	B	HSC2505	0.54	0.02	2.94	4.16	B
HSC2571	0.92	0.23	0.96	1.36	B	Platais12	1.55	0.15	2.45	3.47	B

Notes. σ_vir10 and σ_vir5 denote the velocity dispersions needed for the virial equilibrium that were calculated by taking 10 and 5 for the mass profile parameter η. Eσ_1D is the uncertainty in σ_1D. B, U, and O denote bound, unbound, and uncertain systems, respectively.

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