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Table 2

Observed cluster properties.

Cluster ρ [pc-3] fdisc References

NGC 2024 ≈ 103 85% (1), (2)
ONC ≈ 104 80% (3), (4)
NGC 3603 ≈ 105 40% (5), (6)

Notes. Column 1 gives the cluster name, ρ is the cluster density (Col. 2), and fdisc the disc fraction (Col. 3). The references for the densities and disc fractions are given in Col. 4.

Reference. (1) Lada et al. (1991); (2) Haisch et al. (2000); (3) McCaughrean & Stauffer (1994); (4) Lada et al. (2000); (5) Harayama et al. (2008); (6) Stolte et al. (2004).

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