108 citations · 336 across the 9 of their papers we have counts for
6 papers · 1 filter
The Correlation between X-ray and UV Properties of BAL QSOs
LuLu Fan, HuiYuan Wang, Tinggui Wang +4
We compile a large sample of broad absorption lines (BAL) quasars with X-ray observations from the \xmm archive data and Sloan Digital Sky Survey Data Release 5. The sample consist…
Wolf-Rayet Galaxies in the Sloan Digital Sky Survey: the metallicity dependence of the initial mass function
Wei Zhang, Xu Kong, Cheng Li +2
We use a large sample of 174 Wolf-Rayet (WR) galaxies drawn from the Sloan Digital Sky Survey to study whether and how the slope of the stellar initial mass function depends on met…
Oxygen abundance in the Sloan Digital Sky Survey
F. Shi, X. Kong, F. Z. Cheng
We present two samples of $\hii$ galaxies from the Sloan Digital Sky Survey (SDSS) spectroscopic observations data release 3. The electron temperatures() of 225 galaxies are c…
Spectroscopic study of blue compact galaxies III. Empirical population synthesis
Xu Kong, Stephane Charlot, Achim Weiss +1
This is the third paper of a series dedicated to the study of the star formation rates, star formation histories, metallicities and dust contents of a sample of blue compact galaxi…
Principal component analysis for spectral indices of stellar populations
Xu Kong, Fuzhen Cheng
We apply the method of principal component analysis to a sample of simple stellar populations to select some age-sensitive spectral indices. Besides the well-known age-sensitive in…
Multiwavelength observations of short time-scale variability in NGC 4151. II. Optical observations
S. Kaspi et al
We present the results of an intensive ground-based spectrophotometric monitoring campaign of the Seyfert galaxy NGC~4151 for a period of over two months, with a typical temporal r…