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The orientation of the nuclear obscurer of the AGNs
Shiyin Shen, Zhengyi Shao, Minfeng Gu
We examine the distribution of axis ratios of a large sample of disk galaxies hosting type 2 AGNs selected from the Sloan Digital Sky Survey and compare it with a well-defined cont…
The mass-dependent star formation histories of disk galaxies: infall model versus observations
R. X. Chang, J. L. Hou, S. Y. Shen +1
We introduce a simple model to explore the star formation histories of disk galaxies. We assume that the disk origins and grows by continuous gas infall. The gas infall rate is par…
Eight new quasars discovered by LAMOST in one extragalactic field
Xue-Bing Wu, Zhendong Jia, Zhaoyu Chen +18
We report the discovery of eight new quasars in one extragalactic field (five degree centered at RA=, Dec=) with the LAMOST commissioning observation…
A very bright i=16.44 quasar in the `redshift desert' discovered by LAMOST
Xue-Bing Wu, Zhaoyu Chen, Zhendong Jia +18
The redshift range from 2.2 to 3, is known as the 'redshift desert' of quasars because quasars with redshift in this range have similar optical colors as normal stars and are thus…