21 citations · 67 across the 5 of their papers we have counts for
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Spectral variability of FIRST bright QSOs with SDSS observations
Wei-Hao Bian, Li Zhang, Richard Green +1
For some samples, it has been shown that spectra of QSOs with low redshift are bluer during their brighter phases. For the FIRST bright QSO sample, we assemble their spectra from S…
Multicolor Photometry of the Galaxies in Abell 1775: Substructures, Luminosity Functions, and Star-Formation Properties
Li Zhang, Qirong Yuan, Qian Yang +4
An optical photometric observation in 15 bands was carried out for nearby galaxy cluster Abell 1775 by the Beijing-Arizona-Taiwan-Connecticut (BATC) multi-color system. Over 5000 s…
The variability of optical \feii emission in PG QSO 1700+518
W. H. Bian, K. Huang, C. Hu +4
It is found that \feii emission contributes significantly to the optical and ultraviolet spectra of most active galactic nuclei. The origin of the optical/UV \feii emission is stil…
Multicolor Photometry of the Galaxy Cluster A98: Substructures and Star Formation Properties
L. Zhang, Q. -R. Yuan, X. Zhou +5
An optical photometric observation with the Beijing-Arizona-Taiwan-Connecticut (BATC) multicolor system is carried out for A98 (z=0.104), a galaxy cluster with two large enhancemen…