Flux- and volume-limited groups/clusters for the SDSS galaxies: catalogues and mass estimation

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Table 2

Volume-limited group statistics. Comparison with flux-limited groups.

Sample	Frac^a	Frac 0.5^b	Frac 0.1^c
	%	%	%

Volume-limited-18.0	91	71	37
Volume-limited-18.5	90	71	38
Volume-limited-19.0	89	70	39
Volume-limited-19.5	87	69	40
Volume-limited-20.0	83	63	37
Volume-limited-20.5	80	60	39
Volume-limited-21.0	76	56	39

Notes.

^(a)

Match fraction between volume- and flux-limited groups. The match radius is 1 h^-1 Mpc.

^(b)

Fraction of matches where the relative mass difference is smaller than 0.5.

^(c)

Fraction of matches where the relative mass difference is smaller than 0.1.

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