| Super-Large-Scale Structures in the Sloan Digital Sky Survey |
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| 作者姓名： | Xin-Fa Deng~ Yi-Qing Chen~ Qun Zhang~ and Ji-Zhou He~ Mathematics and Physics College Nanchang University Jiangxi Management College Nanchang University Nanchang |
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| 作者单位： | Xin-Fa Deng~1 Yi-Qing Chen~2 Qun Zhang~1 and Ji-Zhou He~1 1 Mathematics and Physics College，Nanchang University，Jiangxi 330047; 2 Management College，Nanchang University，Nanchang 330047 |
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| 基金项目： | Supported by the National Natural Science Foundation of China |
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| 摘 要： | We study the super-large-scale structures in the Sloan Digital Sky Survey by cluster analysis,and examine the geometry and the properties of the member galaxies.Two subsamples are selected from the SDSS,Subsample 1 at the celestial equator and Subsample 2 further north.In Subsample 1 we discover two compact super-large-scale structures:the Sloan Great Wall and the CfA Great Wall.The Sloan Great Wall,located at a median redshift of z=0.07804,has a total length of about 433 Mpc and a mean galaxy density of about six times that of the whole sample. Most of its member galaxies are of medium size and brightness.The CfA Great Wall, located at a median redshift of z=0.03058,has a total length of about 251 Mpc and includes large percentages of faint and small galaxies and relatively fewer early-type galaxies.
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| 关 键 词： | 星系 距离 天体谱线 光谱 |
Super-Large-Scale Structures in the Sloan Digital Sky Survey |
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| Xin-Fa Deng Yi-Qing Chen Qun Zhang and Ji-Zhou He Mathematics and Physics College,Nanchang University,Jiangxi , Management College,Nanchang University,Nanchang .Super-Large-Scale Structures in the Sloan Digital Sky Survey[J].Chinese Journal of Astronomy and Astrophysics,2006,6(1):35-42. |
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| Authors: | Xin-Fa Deng Yi-Qing Chen Qun Zhang Ji-Zhou He |
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| Institution: | [1]Mathematics and Physics College, Nanchang University, Jiangxi 330047 [2]Management Collegel Nanchang University,Nanchang 330047 |
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| Abstract: | We study the super-large-scale structures in the Sloan Digital Sky Survey by cluster analysis,and examine the geometry and the properties of the member galaxies.Two subsamples are selected from the SDSS,Subsample 1 at the celestial equator and Subsample 2 further north.In Subsample 1 we discover two compact super-large-scale structures:the Sloan Great Wall and the CfA Great Wall.The Sloan Great Wall,located at a median redshift of z=0.07804,has a total length of about 433 Mpc and a mean galaxy density of about six times that of the whole sample. Most of its member galaxies are of medium size and brightness.The CfA Great Wall, located at a median redshift of z=0.03058,has a total length of about 251 Mpc and includes large percentages of faint and small galaxies and relatively fewer early-type galaxies. |
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| Keywords: | galaxy distances and redshifts-large-scale structure of universe |
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