Reaching the boundary between stellar kinematic groups and very wide binaries - IV. The widest Washington Double Star systems with ρ ≥ 1000 arcsec in Gaia DR3

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Table 4

Multiplicity order rates of ultrawide galactic systems.

System type	Minimum rate^(a) (%)	Estimated rate^(b) (%)
Double	51.6±14.6	32.3±11.5
Triple	25.8±10.3	23.7±9.9
Quadruple	15.1±7.9	21.5±9.4
Quintuple or higher	7.5±5.6	22.6±9.7

Notes. ^(a) Multiplicity order rate including only systems resolved by Gaia or tabulated by WDS. ^(b)Multiplicity order rate including also close binary candidates with large RUWE, σ_Vr, or proper motion anomaly.

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