599 research outputs found
Color and Morphology of Galaxies in the Region of the 3C 324 Clusters at z 1.2
We investigated the color and morphology of optically selected galaxies in
the region of clusters at z 1.2 near to the radio galaxy 3C 324 using
archived data taken with the Hubble Space Telescope. The faint galaxies
selected at the HST F702W band that contribute to the surface-density excess of
the region have wide ranges of color, size, and morphology, which are not
likely to be due to contamination by foreground galaxies. Namely, the
rest-frame ultraviolet emission properties of the galaxies in the clusters are
not very homogeneous; various amounts of star-formation activity may occur in a
significant fraction of them. Although our analysis is purely statistical, we
find that typical star-forming galaxies with blue colors have a relatively
late-type morphology compared to the red quiescent population in the systems.Comment: 12 pages, 10 figures, accepted for publication in PAS
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