Table 1: Multiplicity among Hipparcos members of the three subgroups of Sco OB2. The columns show the subgroup name (Upper Scorpius; Upper Centaurus Lupus; Lower Centaurus Crux), the distance (see de Zeeuw et al. 1999), the age (Preibisch et al. 2002; de Geus et al. 1989 for US; Mamajek et al. 2002 for UCL and LCC), the number of known single stars, binary stars, triple systems and N>3 systems, and the binary statistics (see Sect. 7), after inclusion of the new results presented in this paper.
D Age S B T >3 $F_{\rm M}$ $F_{\rm NS}$ $F_{\rm C}$

(pc) (Myr)

US 145 5-6 64 44 8 3 0.46 0.67 0.61

UCL 140 15-22 132 65 19 4 0.40 0.61 0.52

LCC 118 17-23 112 57 9 1 0.37 0.56 0.44

all 308 166 36 8 0.41 0.61 0.51

**Table 1:** Multiplicity among *Hipparcos* members of the three subgroups of Sco OB2. The columns show the subgroup name (Upper Scorpius; Upper Centaurus Lupus; Lower Centaurus Crux), the distance (see de Zeeuw et al. 1999), the age (Preibisch et al. 2002; de Geus et al. 1989 for US; Mamajek et al. 2002 for UCL and LCC), the number of known single stars, binary stars, triple systems and N>3 systems, and the binary statistics (see Sect. 7), after inclusion of the new results presented in this paper.
	D	Age	S	B	T	>3	$F_{\rm M}$	$F_{\rm NS}$	$F_{\rm C}$
	(pc)	(Myr)
US	145	5-6	64	44	8	3	0.46	0.67	0.61
UCL	140	15-22	132	65	19	4	0.40	0.61	0.52
LCC	118	17-23	112	57	9	1	0.37	0.56	0.44
all			308	166	36	8	0.41	0.61	0.51

Source LaTeX | All tables | In the text