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

Table 5

D(4000), [OII] equivalent width, and 𝐻𝛿 index for emission-line galaxies. Index errors are measured on combined spectra. The number of objects in each bin, 𝑁_𝑔𝑎𝑙 is listed in the second column and the rms dispersions in the index distributions within each bin are listed in parenthesis. The values of EQW(H𝛿) marked (*) were measured after fitting an underlying absorption profile on spectra displaying H𝛿 both in absorption and in emission. The S/N ratios of the continuum spectra in the range 4150–4250 Å for a pixel element of 2.6 Å, are given in the last column.

⟨𝑧⟩	𝑁gal	D(4000), (𝜎)	EQW([OII]), (𝜎)	EQW(H𝛿)	𝑆/𝑁
0.29	25	1.22±0.02 (0.16)	19.6±0.3 (17)	−3.07±0.2	32
⟨0.43⟩	75	1.22±0.01 (0.14)	17.9±0.3 (12)	−3.01±0.1	52
⟨0.65⟩	60	1.14±0.01 (0.12)	19.0±0.3 (12)	−3.3±0.1	35
0.82	22	1.07±0.02 (0.09)	37.2±0.7 (16)	−5±0.7 (*)	28
⟨0.9⟩	44	1.08±0.01 (0.10)	39.7±0.5 (20)	−5±0.5 (*)	31
0.99	16	1.08±0.02 (0.13)	43.5±0.9 (23)	−5.5±0.7 (*)	25