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arXiv 1406.0943astro-ph.GA
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利用SuperCOSMOS、2 MASS和WISE数据识别星系团的一种有效方法

An efficient method to identify galaxy clusters by using SuperCOSMOS, 2MASS and WISE data

W. W. Xu, Z. L. Wen, J. L. Han

摘要:

宽视场红外巡天探测器(WISE)的巡天数据为星系团的识别提供了机会。提出了一种将WISE数据与SuperCOSMOS和2 MASS数据相结合的有效的星系团探测方法。在进行星-星系分离之后,我们计算了具有以前由SuperCOSMOS,2 MASS和WISE数据估计的光度红移的星系周围的伴星系的数量。然后定义缩放的丰富度以识别聚类。从与斯隆数字巡天条纹82区域重合的275 deg^2天区中,我们识别出302个红移范围为0.1<z<0.35的星团,其中247个(82%)是以前已知的SDSS星团。结果表明,利用SuperCOSMOS、2 MASS和WISE的全天数据,我们的方法对识别星系团是有效的。

英文摘要:

The survey data of Wide-field Infrared Survey Explorer (WISE) provide an opportunity for the identification of galaxy clusters. We present an efficient method for detecting galaxy clusters by combining the WISE data with SuperCOSMOS and 2MASS data. After performing star-galaxy separation, we calculate the number of companion galaxies around the galaxies with photometric redshifts previously estimated by the SuperCOSMOS, 2MASS and WISE data. A scaled richness is then defined to identify clusters. From a sky area of 275 deg^2 coincident with Sloan Digital Sky Survey Stripe 82 region, we identify 302 clusters in the redshift range of 0.1<z<0.35, 247 (82%) of which are previously known SDSS clusters. The results indicate that our method is efficient for identifying galaxy clusters by using the all sky data of the SuperCOSMOS, 2MASS and WISE.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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