Five E+A (post-starburst) galaxies as Brightest Cluster Galaxies

查看全文 作　　者：LIU [1,2]FengShan;WEN [2]ZhongLue;HAN [2]JinLin;MENG [2]XianMin

机构地区：[1]College of Physical Science and Technology,Shenyang Normal University,Shenyang 110034,China;[2]National Astronomical Observatories,Chinese Academy of Sciences,A20 Datun Road,Beijing 100012,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》索引2012年第55卷第2期,共4页

基　　金：supported by the Liaoning Educational Foundation of China (Grant No.2009A646);the National Natural Science Foundation of China (Grant Nos.10773016,10821061 and 1083303);the National Key Basic Research Science Foundation of China (Grant No.2007CB815403);Funding for the creation and distribution of the SDSS Archive has been provided by the Alfred P.Sloan Foundation 摘　　要：Brightest Cluster Galaxies (BCGs) are mostly elliptical galaxies and very rarely have prominent star formations.We found that five out of 8,812 BCGs are E+A (i.e.,post-starburst) galaxies,having an H absorption line with an equivalent width >2.5 and no distinct emission lines in [O II] and H.The E+A features we identified from the BCGs for the first time are not as significant as those in general galaxies,indicating that historically the star formations were not very violent. 关键词：星系团星暴 EA 椭圆星系恒星形成吸收线发射线

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Five E+A (post-starburst) galaxies as Brightest Cluster Galaxies

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