Search Publications

A Catalog of 132,684 Clusters of Galaxies Identified from Sloan Digital Sky Survey III

Han, J. L.; Wen, Z. L.; Liu, F. S.

Using the photometric redshifts of galaxies from the Sloan Digital Sky Survey III (SDSS-III), we identify 132,684 clusters in the redshift range of 0.05 <= z < 0.8. Monte Carlo simulations show that the false detection rate is less than 6% for the whole sample. The completeness is more than 95% for clusters with a mass of M ₂₀₀ &g…

Molecular Environments of 51 Planck Cold Clumps in the Orion Complex

Liu, Tie; Wu, Yuefang; Zhang, Huawei

A mapping survey of 51 Planck cold clumps projected on the Orion complex was performed with J = 1-0 lines of ¹²CO and ¹³CO with the 13.7 m telescope at the Purple Mountain Observatory. The mean column densities of the Planck gas clumps range from 0.5 to 9.5 × 10²¹ cm^-2, with an average value of (2.9 ± 1.…