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- Chinese Academy of SciencesCN307 papers
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4 papers · 2 filters
The Prevalence of Narrow Optical Fe II Emission Lines in Type 1 Active Galactic Nuclei
Xiao-Bo Dong, Luis C. Ho, Jian-Guo Wang +4
From detailed spectral analysis of a large sample of low-redshift active galactic nuclei (AGNs) selected from the Sloan Digital Sky Survey, we demonstrate---statistically for the f…
Radio sources with ultra-high polarization
H. Shi, H. Liang, J. L. Han +1
A sample of 129 unresolved radio sources with ultrahigh linear polarization (>30 per cent) has been selected from the NRAO VLA Sky Survey. Such high average linear polarization is…
Violent Intranight Optical Variability of a Radio-Loud Narrow-Line Seyfert 1 Galaxy: SDSS J094857.3+002225
Hao Liu, Jing Wang, Yufeng Mao +1
SDSS J094857.3+002225 is a very radio-loud narrow-line Seyfert 1 (NLS1) galaxy. Here, we report our discovery of the intranight optical variability (INOV) of this galaxy through th…
A comparison of hard X-ray photon indices and iron \ka emission lines in X-ray luminous narrow- and broad-line Seyfert 1 galaxies
Xin-Lin Zhou, Shuang-Nan Zhang
We use publicly available XMM-Newton data to systematically compare the hard X-ray photon indices, and the iron K emission lines of narrow-line (NL) and broa…