TY - JOUR
T1 - The transformation of galaxies within the large-scale structure around a Z = 0.41 cluster
AU - Kodama, Tadayuki
N1 - Funding Information:
We thank the Subaru Telescope observatory staff and the Suprime-Cam team for their invaluable effort to complete the telescope and the instrument over the last 10 years. We are grateful to Y. Komiyama for his assistance during our observations. We acknowledge the Suprime-Cam team for allowing us to use the blank-field data. We also thank M. Balogh, K. Pimbblet, N. Arimoto, and K. Shimasaku for helpful discussions. T. K. and F. N. acknowledge the Japan Society for the Promotion of Science for support through its Research Fellowships for Young Scientists. I. S. acknowledges support from the Royal Society and the Leverhulme Trust.
PY - 2001
Y1 - 2001
N2 - We present deep, panoramic multicolor imaging of the distant rich cluster A851 (Cl 0939+4713, z = 0.41) using Suprime-Cam on the Subaru Telescope. These images cover a 27′ field of view, ∼11 h50-1 Mpc at z = 0.41, and by exploiting photometric redshifts estimated from our BVRI imaging we can isolate galaxies in a narrow redshift slice at the cluster redshift. Using a sample of ∼ 2700 probable cluster members brighter than 0.02LV*, we trace the network of filaments and subclumps around the cluster core. The depth of our observations, combined with the identification of filamentary structure, gives us an unprecedented opportunity to test the influence of the environment on the properties of low-luminosity galaxies. We find an abrupt change in the colors of ≲0.1Lv* galaxies at a local density of 100 galaxies Mpc-2, with the population in lower density regions being predominantly blue while those in higher density regions are red. The transition in the color-local density behavior occurs at densities corresponding to subclumps within the filaments surrounding the cluster. Identifying the sites where the transition occurs brings us much closer to understanding the mechanisms that are responsible for establishing the present-day relationship between environment and galaxy characteristics.
AB - We present deep, panoramic multicolor imaging of the distant rich cluster A851 (Cl 0939+4713, z = 0.41) using Suprime-Cam on the Subaru Telescope. These images cover a 27′ field of view, ∼11 h50-1 Mpc at z = 0.41, and by exploiting photometric redshifts estimated from our BVRI imaging we can isolate galaxies in a narrow redshift slice at the cluster redshift. Using a sample of ∼ 2700 probable cluster members brighter than 0.02LV*, we trace the network of filaments and subclumps around the cluster core. The depth of our observations, combined with the identification of filamentary structure, gives us an unprecedented opportunity to test the influence of the environment on the properties of low-luminosity galaxies. We find an abrupt change in the colors of ≲0.1Lv* galaxies at a local density of 100 galaxies Mpc-2, with the population in lower density regions being predominantly blue while those in higher density regions are red. The transition in the color-local density behavior occurs at densities corresponding to subclumps within the filaments surrounding the cluster. Identifying the sites where the transition occurs brings us much closer to understanding the mechanisms that are responsible for establishing the present-day relationship between environment and galaxy characteristics.
KW - Cosmology: Observations
KW - Galaxies: Evolution
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U2 - 10.1086/338100
DO - 10.1086/338100
M3 - Article
AN - SCOPUS:0038687809
SN - 0004-637X
VL - 562
SP - L9-L13
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1 PART II
ER -