High Resolution Imaging of Distant Clusters: I. Close Pairs, Interactions, and the "Butcher-Oemler" Effect at Z = 0.4
High Resolution Imaging of Distant Clusters: I. Close Pairs, Interactions, and the "Butcher-Oemler" Effect at Z = 0.4
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远处星团的高分辨率成像：I. 近距离配对、相互作用以及 Z = 0.4 时的“Butcher-Oemler”效应
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
R. Mcclure
中科院分区：
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作者：
R. Lavery;M. Pierce;R. Mcclure
We present new ground-based high-resolution images of 23 blue galaxies whose membership has been confirmed spectroscopically in the two distant rich clusters Abell 370 and Cl 0024+1654. The images, taken with the High Resolution Camera on the CFHT, have a stellar FWHM=0.45 arcsec. Ten of these blue galaxies are found to have close companions, with separations on the scale of 1 to 2 arcsec. These multiple systems represent 45% of the confirmed blue galaxy population in the two clusters. Several of the remaining blue galaxies also have peculiar morphologies and features, such as tidal tails, suggestive of interactions/mergers
