星系團(tuán)Abell 85的動(dòng)力學(xué)子結(jié)構(gòu)
發(fā)布時(shí)間:2018-01-11 17:08
本文關(guān)鍵詞:星系團(tuán)Abell 85的動(dòng)力學(xué)子結(jié)構(gòu) 出處:《天文學(xué)報(bào)》2010年03期 論文類型:期刊論文
更多相關(guān)文章: 星系 星系團(tuán) 個(gè)別 星系 運(yùn)動(dòng)學(xué)與動(dòng)力學(xué) 星系 cD
【摘要】:Abell 85是位于南半天區(qū)紅移為0.055的cD星系團(tuán).基于前人的光譜觀測(cè)數(shù)據(jù)和SDSS(Sloan Digital Sky Survey)數(shù)據(jù),利用3σ方法篩選出該星系團(tuán)的370個(gè)成員星系,并對(duì)其動(dòng)力學(xué)情況進(jìn)行了分析.從這些成員星系的空間分布和局域視向速度分布中,發(fā)現(xiàn)了該星系團(tuán)含有4個(gè)明顯的子結(jié)構(gòu),且正處于兩兩并合之中.這表明Abell 85處在動(dòng)力學(xué)活躍的狀態(tài),遠(yuǎn)未達(dá)到動(dòng)力學(xué)平衡.
[Abstract]:Abell 85 is a cd galaxy cluster with a redshift of 0. 055 in the southern half day region. Sloan Digital Sky surveys. The 370 member galaxies of the cluster were screened by the 3 蟽 method and their dynamics were analyzed. The spatial distribution and local apparent velocity distribution of these member galaxies were analyzed. It is found that the cluster has four distinct substructures and is in the process of merging. This indicates that Abell 85 is in a dynamic state and is far from reaching the kinetic equilibrium.
【作者單位】: 南京師范大學(xué)物理科學(xué)與技術(shù)學(xué)院;
【基金】:國(guó)家自然科學(xué)基金(10778618,10633020)資助項(xiàng)目
【分類號(hào)】:P157.8
【正文快照】: 1己l吉一J.‘二J星系團(tuán)是宇宙中最大的維里化的束縛系統(tǒng),,從它的動(dòng)力學(xué)結(jié)構(gòu)中可以獲得星系形成以及宇宙大尺度結(jié)構(gòu)的信息[l].鄰近富星系團(tuán)Aben85的中心主導(dǎo)星系McG一02一02一086是一個(gè)cD星系,其視線投影方向上存在著鄰近的星系團(tuán)Abell87和Aben 89.Aben89是個(gè)背景星系團(tuán),而Ab
本文編號(hào):1410432
本文鏈接:http://www.sikaile.net/kejilunwen/tianwen/1410432.html
最近更新
教材專著