Stellar interactions in dense and sparse star clusters

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Table 2:

Typical stellar encounter parameters.
Mass groups	$m_{\star}$	$r_{{\rm enc}}$	$v_{{\rm enc}}$	$\gamma_{{\rm enc}}$
	[ $\mbox{$M_{\odot}$ }$ ]	[AU]	[AU/yr]
low mass	0.1-1	10^2-3	$\sim$ 0.3	10^-1
intermediate mass	1-10	10^2-2.5	$\sim$ 2	1
high mass	10-100	10²	$\sim$ 6	10

Note: the first column denotes the three mass groups, the second column contains the adopted mass ranges, $m_{\star}$ , while in the third typical interaction radii, $r_{{\rm enc}}$ , are listed for each mass group. In the last two columns the resulting ``encounter escape speeds'', $v_{{\rm enc}}$ , and the ``gravitational focusing parameter'', $\gamma_{{\rm enc}}$ , are noted (see text for definitions of these quantities).

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