COSMOS brightest group galaxies - III. Evolution of stellar ages

Open Access

Table 4.

Best linear fit parameters for the relationship between ln(Age_w/yr) and ln(stellar mass) for BGGs in different subsamples (S-I to S-V).

Sample	Subsamples	α	β	σ
COSMOS	S-I	22.502 ± 0.045	0.208 ± 0.056	0.325 ± 0.037
COSMOS	S-II	22.425 ± 0.109	0.229 ± 0.098	0.362 ± 0.066
COSMOS	S-III	21.922 ± 0.101	0.526 ± 0.110	0.421 ± 0.058
COSMOS	S-IV	21.471 ± 0.110	0.577 ± 0.144	0.694 ± 0.075
COSMOS	S-V	21.181 ± 0.112	0.830 ± 0.126	0.593 ± 0.093
H15	S-I	22.869 ± 0.002	−0.061 ± 0.004	0.171 ± 0.002
H15	S-II	22.957 ± 0.006	−0.001 ± 0.008	0.138 ± 0.004
H15	S-III	22.614 ± 0.003	−0.002 ± 0.005	0.152 ± 0.002
H15	S-IV	22.262 ± 0.005	−0.009 ± 0.008	0.169 ± 0.003
H15	S-V	21.981 ± 0.006	−0.038 ± 0.010	0.183 ± 0.004
Magneticum	S-I	22.712 ± 0.001	0.055 ± 0.002	0.002 ± 0.001
Magneticum	S-II	22.753 ± 0.007	0.007 ± 0.004	0.003 ± 0.001
Magneticum	S-III	22.409 ± 0.004	0.015 ± 0.002	0.074 ± 0.001
Magneticum	S-IV	22.068 ± 0.007	0.016 ± 0.004	0.093 ± 0.002
Magneticum	S-V	21.641 ± 0.013	0.043 ± 0.007	0.034 ± 0.007

Notes.α, β, and σ represent the intercept, slope, and intrinsic scatter in stellar age, respectively, related to the regression relationship described in Section 2.3 and Eq. (5). The stellar mass of galaxies has been normalized to 10¹¹ M_⊙.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.