“Butcher–Oemler effect”的概念、定义、翻译、参考文献-科学参考

Butcher–Oemler effect

Astronomy

A property of most clusters of galaxies with redshifts of about 0.4, which show a much higher proportion of late-type spiral and irregular galaxies (disk galaxies) than do similar clusters closer to us. This effect implies a strong evolution of galaxies in the recent past. Many of the disk galaxies must have disappeared from view in the nearby clusters, probably as a result of mergers or by losing their gas. The effect was reported in 1978 by the American astronomers Harvey Raymond Butcher (1947– ) and Augustus Oemler, Jr (1954– ).

单词	Butcher–Oemler effect
释义	Butcher–Oemler effect Astronomy A property of most clusters of galaxies with redshifts of about 0.4, which show a much higher proportion of late-type spiral and irregular galaxies (disk galaxies) than do similar clusters closer to us. This effect implies a strong evolution of galaxies in the recent past. Many of the disk galaxies must have disappeared from view in the nearby clusters, probably as a result of mergers or by losing their gas. The effect was reported in 1978 by the American astronomers Harvey Raymond Butcher (1947– ) and Augustus Oemler, Jr (1954– ).
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