Galaxy Evolution in a Pilot Survey up to 𝑧=1 and CDM Halos

Table 8

Equivalent widths of [OII] and 𝐻𝛿 in absorption, 4000 Å break amplitudes, and G-step indexes for “red” emission systems. The number of galaxies in each bin (𝑁_𝑔𝑎𝑙) is given in the second column and the rms dispersions EQW([OII]) and D(4000) within each bin are given in parenthesis as in Table 5. The values of 𝐸𝑄𝑊(𝐻𝛿) marked with a (*) are measured as in Table 7. The S/N continuum ratios are measured as in Table 5. The G-steps of absorption systems are listed in the last column for comparison.

⟨𝑧⟩	𝑁gal	EQW([OII])	D(4000)	EQW(H𝛿)	G step	S/N	G step (abs)
0.29	13	13.2±0.3 (11)	1.324±0.038 (0.53)	−1.89±0.05	1.221±0.012	27	1.470±0.018
0.415	22	8.9±0.4 (3.8)	1.330±0.044 (0.17)	−2.34±0.05	1.181±0.015	28	—
⟨0.43⟩	38	10.7±0.5 (4.6)	1.317±0.038 (0.15)	−2.32±0.05	1.164±0.012	34	1.423±0.018
0.447	16	10.5±0.5 (5.5)	1.300±0.040 (0.13)	−2.48±0.07	1.142±0.016	34	—
0.63	17	13.9±0.5 (6.6)	1.182±0.032 (0.12)	−3.80±0.05	1.056±0.014	29	—
⟨0.65⟩	29	14.3±0.5 (6.0)	1.197±0.037 (0.10)	−4.42±0.05	1.054±0.010	37	1.369±0.017
0.68	12	17.0±0.7 (5.8)	1.215±0.040 (0.07)	−5.0±0.1	1.054±0.012	28	—
0.82	11	26.7±0.7 (12.5)	1.118±0.038 (0.08)	−4.6±0.5 (*)	0.977±0.019	22	—
⟨0.9⟩	23	29.5±0.6 (19)	1.132±0.040 (0.09)	−5.3±0.3 (*)	0.971±0.015	25	1.325±0.034
0.99	9	30.3±0.7 (19.7)	1.150±0.050 (0.07)	−5.5±0.5 (*)	0.965±0.020	20	—