Table 8: Statistics of the spatial distribution of the various age groups in the sample. For each age group the total number of stars and the number per square degree is given. The numbers are for a RASS count-rate limit of 0.03 cts s^-1except for area V which has a count-rate limit of 0.01 cts s^-1.

area Age group

PMS Pl_ZAMS UMa Hya+

<100 Myr 100 Myr $\sim$ 300 Myr >660 Myr

I 8 0.056 14 0.097 3 0.021 10 0.069

II 2 0.014 9 0.063 1 0.007 22 0.153

III 0 0 7 0.049 1 0.007 16 0.111

IV 0 0 1 0.014 1 0.014 5 0.069

V 0 0 3 0.084 6 0.161 11 0.296

VI 0 0 6 0.042 7 0.049 10 0.069

**Table 8:** Statistics of the spatial distribution of the various age groups in the sample. For each age group the total number of stars and the number per square degree is given. The numbers are for a RASS count-rate limit of 0.03 cts s^-1except for area V which has a count-rate limit of 0.01 cts s^-1.
area	Age group
	PMS	Pl_ZAMS	UMa	Hya+
	<100 Myr	100 Myr	$\sim$ 300 Myr	>660 Myr
I	8	0.056	14	0.097	3	0.021	10	0.069
II	2	0.014	9	0.063	1	0.007	22	0.153
III	0	0	7	0.049	1	0.007	16	0.111
IV	0	0	1	0.014	1	0.014	5	0.069
V	0	0	3	0.084	6	0.161	11	0.296
VI	0	0	6	0.042	7	0.049	10	0.069

Source LaTeX | All tables | In the text

	1 Introduction
	2 The sample
	3 Spectroscopic observations
	4 Observational results
	5 Data analysis and discussion
	6 Conclusions
	Appendix A: Parameters of the sample and results
	References
	Online Material