Table 1: Mean properties of the three galaxy SED class samples.
property Dust-free old Dusty red-seq Blue cloud

$N_{\rm galaxy}$ 294 168 333

$N_{\rm field~~ contamination}$ 6 7 49

$N_{\rm spectra}$ 144 69 36

$z_{\rm spec}$ 0.1646 0.1646 0.1658

$\sigma_{cz}/(1+z)$ /(km s^-1) 939 1181 926

$z_{\rm spec, N}$ 0.1625 0.1615 N/A

$z_{\rm spec, S}$ 0.1679 0.1686 N/A

$\sigma_{cz,\rm N}/(1+z)$ /(km s^-1) 589 597 N/A

$\sigma_{cz,\rm S}/(1+z)$ /(km s^-1) 522 546 N/A

$\log (\Sigma_{10} ({\rm Mpc}/h)^2)$ 2.188 1.991 1.999

$EW_{\rm e}$ (O II)/Å N/A $4.2\pm 0.4$ $17.5\pm 1.5$

$EW_{\rm a}$ (H $\delta$ )/Å $2.3\pm 0.5$ $2.6\pm 0.5$ $4.5\pm 1.0$

age/Gyr 6.2 3.5 1.2

E_B-V 0.044 0.212 0.193

$(U-V)_{\rm rest}$ 1.372 1.293 0.670

$M_{V,\rm rest}$ -19.31 -19.18 -18.47

B-R 1.918 1.847 1.303

V-I 1.701 1.780 1.290

R-I 0.870 0.920 0.680

U-420 0.033 -0.079 -0.377

420-464 0.537 0.602 0.560

464-518 0.954 0.827 0.490

604-646 0.356 0.339 0.238

753-815 0.261 0.274 0.224

**Table 1:** Mean properties of the three galaxy SED class samples.
property	Dust-free old	Dusty red-seq	Blue cloud
$N_{\rm galaxy}$	294	168	333
$N_{\rm field~~ contamination}$	6	7	49
$N_{\rm spectra}$	144	69	36
$z_{\rm spec}$	0.1646	0.1646	0.1658
$\sigma_{cz}/(1+z)$ /(km s^-1)	939	1181	926
$z_{\rm spec, N}$	0.1625	0.1615	N/A
$z_{\rm spec, S}$	0.1679	0.1686	N/A
$\sigma_{cz,\rm N}/(1+z)$ /(km s^-1)	589	597	N/A
$\sigma_{cz,\rm S}/(1+z)$ /(km s^-1)	522	546	N/A
$\log (\Sigma_{10} ({\rm Mpc}/h)^2)$	2.188	1.991	1.999
$EW_{\rm e}$ (O II)/Å	N/A	$4.2\pm 0.4$	$17.5\pm 1.5$
$EW_{\rm a}$ (H $\delta$ )/Å	$2.3\pm 0.5$	$2.6\pm 0.5$	$4.5\pm 1.0$
age/Gyr	6.2	3.5	1.2
E_B-V	0.044	0.212	0.193
$(U-V)_{\rm rest}$	1.372	1.293	0.670
$M_{V,\rm rest}$	-19.31	-19.18	-18.47
B-R	1.918	1.847	1.303
V-I	1.701	1.780	1.290
R-I	0.870	0.920	0.680
U-420	0.033	-0.079	-0.377
420-464	0.537	0.602	0.560
464-518	0.954	0.827	0.490
604-646	0.356	0.339	0.238
753-815	0.261	0.274	0.224

Source LaTeX | All tables | In the text

	1 Introduction
	2 Data
	3 The galaxy sample
	4 Analysis of galaxy types
	5 Discussion
	6 Summary
	References
	Online Material
	Appendix A: Accuracy of photometric redshifts
	Appendix B: In retrospect: selecting old stellar populations