大尺度环境对星系性质的影响

发布时间：2018-02-16 21:52

本文关键词： 宇宙学宇宙大尺度结构星系恒星形成率　出处：《天文学报》2016年02期 　论文类型：期刊论文

【摘要】：星系的恒星形成性质及其随环境变化的规律对理解星系的形成与演化有着重要作用.不同的研究团组根据Sloan巡天(SDSS)数据分析星系物理性质及星系所在的大尺度环境.分别利用了来自Tempel等的纤维结构(filament)编目和来自Wang等的大尺度结构分类的星系编目,并考虑了星系形态、高低局域密度环境、中心(卫星)星系影响,发现星系的性质和星系所在大尺度环境相关:不同大尺度环境对漩涡星系和卫星星系的SSFR(specific star formation rate)和SFR(star formation rate)都有显著影响,但对椭圆星系和中心星系的影响很小,且低局域密度区域的星系比在高局域密度区域中的星系对不同大尺度环境更敏感,即使在相同星系质量的情况下上述结论依然成立,此外来自Tempel等的编目的统计与来自Wang等的在SSFR分布上并不完全一致.
[Abstract]:Star forming properties of galaxies and their rules of variation with environment play an important role in understanding the formation and evolution of galaxies. Analysis of physical Properties of galaxies and Large-Scale Ring of galaxies based on Sloan Survey data. Using fiber structure cataloguing from Tempel et al., and galaxy cataloguing from large scale structure classification from Wang et al., Taking into account the shape of galaxies, the environment of high and low local density, the influence of central (satellite) galaxies, It was found that the nature of galaxies is related to their large scale environments: different large scale environments have significant effects on SSFR(specific star formation SFR(star and SFR(star formation galaxies, but have little effect on elliptical galaxies and central galaxies. And galaxies in low local density regions are more sensitive to different large scale environments than those in high local density regions. This conclusion holds true even when the mass of galaxies is the same. In addition, the statistics of catalogs from Tempel et al are not completely consistent with those from Wang et al in SSFR distribution.
【作者单位】：中国科学院紫金山天文台;中国科学院大学;
【基金】：江苏省杰出青年基金项目(BK20140050) 973项目(2015CB857003,2013CB834900) 国家自然科学基金项目(11333008)资助
【分类号】：P152

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