标题： 中红外证据表明致密星系群中的星系演化加速 显示英文标题

标题： Mid-Infrared Evidence for Accelerated Evolution in Compact Group Galaxies

摘要： 我们通过将来自12个希克森致密星系群（HCGs）的42个星系在中红外颜色空间中的分布与其他几个样本（包括LVL+SINGS星系、相互作用星系和科马星团中的星系）的分布进行比较，发现了致密星系群星系加速演化证据。 我们发现，HCG星系在颜色空间中并非均匀分布，并且存在定量的间隙证据。科马星团的下落区域中的星系也表现出非均匀分布和较不明显的间隙，这可能反映了与致密星系群环境的相似性。 科马中心区域和相互作用样本均未显示出间隙的证据，这使我们推测该间隙是高密度星系环境中特有的现象，在此环境中气体尚未完全被处理或剥离。 显示英文摘要

摘要： We find evidence for accelerated evolution in compact group galaxies from the distribution in mid-infrared colorspace of 42 galaxies from 12 Hickson Compact Groups (HCGs) compared to the the distributions of several other samples including the LVL+SINGS galaxies, interacting galaxies, and galaxies from the Coma Cluster. We find that the HCG galaxies are not uniformly distributed in colorspace, as well as quantitative evidence for a gap. Galaxies in the infall region of the Coma cluster also exhibit a non-uniform distribution and a less well defined gap, which may reflect a similarity with the compact group environment. Neither the Coma Center or interacting samples show evidence of a gap, leading us to speculate that the gap is unique to the environment of high galaxy density where gas has not been fully processed or stripped.