Table 1
Data from observations.
| Name | M (M⊙) | rc (pc) | rh (pc) | rt (pc) | Age (Myr) | trlx (Myr) (a) | D (pc) (b) | Refs. |
|---|---|---|---|---|---|---|---|---|
| Pleiades | 720–950 | 1.3–2.1 | 1.9–2 | 16–19 | 70–125 | 15 | 125 | 1, 2, 3, 4 |
| Hyades | 435 | 3.1 | 4.1 | 10.5 | 500-650 | 35 | 46.5 | 5, 6 |
| Praesepe | ~600 | 0.8–3.5 | 3.9–4 | 11.8–16 | 600–900 | 39 | 170 | 1, 3, 7 |
Notes. rc, rh, and rt are the core, half-mass, and tidal radii ofeach cluster. (a)The relaxation times, trlx, are derived fromthe current mass (M) and rh. (b) Distance from the Sun.
References. 1. Marks & Kroupa (2012) and references therein; 2. Converse & Stahler (2008); 3. Piskunov et al. (2007) 4. Raboud & Mermilliod (1998); 5. Röser et al. (2011); 6. van Leeuwen (2009); 7. Adams et al. (2002).
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