Leo A:邻近的不规则矮星系
[b][color=red]影像提供及[/color][url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.subaru.naoj.org/Information/Image/index.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhjnXMvCKS1tU1Xli-kCueHXOE7jEg][color=red]版权[/color][/url][color=red] ：[/color][/b][color=red] V. Vansevicius ( [/color][url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.fi.lt/fi2/&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhgUDlr3XR1yuUczrjJQkiAvyq3gBw][color=red]IoP Lithuania[/color][/url][color=red] ), N. Arimoto ( [/color][url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.naoj.org/&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhiiAsmtdpZ-h2ytptqECRmL5-g1Uw][color=red]NAOJ[/color][/url][color=red] ) [/color][url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://adsabs.harvard.edu/cgi-bin/nph-bib_query%3Fbibcode%3D2004ApJ...611L..93V&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhgqyBUiF5Jnuq2trOd4vpNLM5fbsw][color=red]et al.[/color][/url][color=red] , [/color][url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://subarutelescope.org/Observing/Instruments/SCam/index.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhjeiRRgUvhKewiC9WLJOOhnyG7-Yg][color=red]Suprime-Cam[/color][/url][color=red] , [/color][url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://subarutelescope.org/&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhjggEJNSd1LbHGEyJXoDV20goeqxQ][color=red]Subaru Telescope[/color][/url][color=red] , [/color][url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.nao.ac.jp/&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhj_ae-DykHqginUdqKuB8CXTLROdw][color=red]NAOJ[/color][/url][color=red] [/color][img]http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/image/0411/leoA_subaru_big.jpg[/img]
[color=seagreen][b]说明：[/b]为什么这个小星系不简单？ [align=left][url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.naoj.org/Pressrelease/2004/08/05/index.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhjMkW3dsZJUpAaLedDOQbTRpWDTQg]上图[/url]和其他同时的观测都认为这个小小的邻近星系只有一个简单的结构。 [/align][align=left]现在Leo A却被认为是一个[url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.daviddarling.info/encyclopedia/D/dwarf_irregular.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhhnlBf2VPIr6NZuiz_w7HRcr5nF7Q]不规则矮星系[/url] -一个在宇宙中最常出现的一种星系类型，也可能是形成更大如[url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/milky_way.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhgaBh04IYgzSLB3c-lEZkCNju-lbw]本银河系[/url]的一块[url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap031117.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhh9KBN-nnllt_42-PPKcR9XfSQ5tg]基石[/url] 。 [/align][align=left]一般来说， [url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap030930.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhjX8Xt6JzOiSCg2Q0htmGTbvqRBXg]目前已经知道[/url]的大型星系都不断的吞食其他星系，并都是由众多围绕在主星系旁[url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.seds.org/messier/more/local.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhj57spjKjTB5VY9ss95GfcU7egwsQ]较小的卫星星系所组成[/url] 。 [/align][align=left][url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://adsabs.harvard.edu/cgi-bin/nph-bib_query%3Fbibcode%3D2004ApJ...611L..93V&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhgqyBUiF5Jnuq2trOd4vpNLM5fbsw]Leo A令人惊讶的复杂性[/url]暗示着自己和其他许多的[url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap991003.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhhKVf8K3uy_iO7eEOtFAkFy-QkdiQ]小星系[/url] ，有着和大型星系同样复杂的形成过程。 [/align][align=left]Leo A大小约10000 [url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://chandra.harvard.edu/photo/cosmic_distance.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhiZylCRaKgqsBkfJv71xvIZZy_-LQ]光年[/url] ，位在[url=http://203.208.39.99/translate_c?hl=zh-CN&sl=zh-TW&u=http://www.seds.org/Maps/Stars_en/Fig/leo.html&prev=/search%3Fq%3Dnasa%25E6%25AF%258F%25E6%2597%25A5%25E4%25B8%2580%25E5%259B%25BE%26complete%3D1%26hl%3Dzh-CN%26newwindow%3D1%26sa%3DG&usg=ALkJrhjqnhYwfZo5qTexGTXSW07hKHPYFA]狮子座[/url]方向约250万光年远的宇宙中。[/color] ::42:: ::42:: ::42:: [size=2][color=magenta](转自成大天文学教室)[/color][/size][/align]
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