Open Access

Table 1

Description of the basic model parameters.

M1 M2 M3 M4
(main model)
Number of models 1 5 10 16
Initial mass (M) 6400 3200 1600 800
rh (pc) 0.31 0.28 0.26 0.24
tgas (Myr) 0.6 0.6 0.6 0.6
tee¯$\[\overline{t_{\mathrm{ee}}}\]$ (Myr) 81.6 82.4 90.0 94.9
trlx (Myr) 58 40 28 19

Notes. For each set of models the number of models is given as well as the initial mass, half-mass radius, rh, gas expulsion time, tgas, average threshold time, tee¯$\[\overline{t_{\mathrm{ee}}}\]$ and half-mass relaxation time, trlx, calculated from Eq. (7.108) of Binney & Tremaine (2008).

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