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Table 5

Number of observed objects compared with the total number of YSOs in the five samples of POISSON, with upper and lower limits of M.

Region Total # Observed M range (M)
of Class I/II YSOsa

Chamaeleon I 108 30 0.2–2.0
Chamaeleon II 26 17 0.2–1.9
L1641 ~200 27 0.2–3.5
Lupus 95 52 0.1–2.0
Serpens 117 17 0.2–2.6



Estimates of the number of YSOs in the clouds are taken from Luhman (2007, Cha I), Alcalá et al. (2008, Cha II), Allen & Davis (2008, L1641), Evans et al. (2009, Lup, Ser).

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