We study the nearest outskirts (R < 3R_200c) of 40 groups and clusters of galaxies of the local Universe (0.02 < z < 0.045 and 300 km s^-1 < σ < 950 km s^-1). Using the SDSS DR10 catalog data, we determined the stellar mass of galaxy clusters corresponding to K_s-luminosity (which we determined earlier based on the 2MASX catalog data) (M*/M_⊙) ∝ (L_K/L⊙)^1.010±0.004 (MK < - 21^m.5, R < R_200c). We also found the dependence of the galaxy cluster stellar mass on halo mass: (M*/M_⊙) ∝ (M_200c/M_⊙)^0.77±0.01. Our results show that the fraction of galaxies with quenched star formation (M_K < -21^m) is maximal in the central regions of the galaxy clusters and equals, on the average, 0.81 ± 0.02; it decreases to 0.44 ± 0.02 outside of the projected radius R_sp (2 < R/R_200c < 3), which we found from the observed profile, but still remains higher than that in the field by 27%. The fraction of early-type “red sequence” galaxies decreases from 0.54 ± 0.02 in the center to 0.24 ± 0.01 beyond R_sp, reaching its field value.

中文翻译：

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星系团及其郊区：“红色序列”，恒星形成率，恒星质量

我们研究了本地宇宙的40个组和星系团的最近郊区（R <3 R _200c）（0.02 < z <0.045和300 km s ^-1 <σ<950 km s ^-1）。使用SDSS DR10目录数据，我们确定对应于星系团的恒星质量ķ_小号-luminosity（我们早先确定的基于所述2MASX目录数据）（中号* / M _⊙）α（大号_ķ /L⊙）^{1.010± 0.004}（M K <-21 ^m .5，R <R _200c）。我们还发现银河簇恒星质量晕质量的依赖性：（中号* / M _⊙）α（中号_200C / M _⊙）^0.77±0.01。我们的结果表明，具有淬灭恒星形成的星系比例（M _K <-21 ^m）在星系团的中心区域最大，平均等于0.81±0.02；它在投影半径R _sp之外减小到0.44±0.02 （2 < R / R _200c<3），这是从观察到的轮廓中发现的，但仍比实地高27％。早期“红色序列”星系的分数从中心的0.54±0.02降低到超出R _sp的0.24±0.01 ，达到其场值。