117 citations · 676 across the 33 of their papers we have counts for
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Spectral principal component analysis of mid-infrared spectra of a sample of PG QSOs
Wei-Hao Bian, Zhi-Cheng He, Richard Green +3
A spectral principal component analysis (SPCA) of a sample of 87 PG QSOs at is presented for their mid-infrared spectra from Spitzer Space Telescope. We have derived the…
The inner 40 pc Radial Distribution of the Star formation Rate for a nearby Seyfert 2 galaxy M51
Li-Ling Fang, Xiao-Lei Jiang, Zhi-Cheng He +1
We investigate spatially resolved specific star formation rate (SSFR) in the inner 40 pc for a nearby Seyfert 2 galaxy, M51 (NGC 5194) by analyzing spectra obtained with the…
Variability of broad absorption lines in a QSO SDSS J022844.09+000217.0 on multi-year timescales
Zhi-Cheng He, Wei-Hao Bian, Xiao-Lei Jiang +1
The variability of the broad absorption lines is investigated for a broad absorption line (BAL) QSO, SDSS J022844.09+000217.0 (z = 2.719), with 18 SDSS/BOSS spectra covering 4128 d…
Variability of QSOs with variable regions in broad absorption troughs from the Sloan Digital Sky Survey
Zhi-Cheng He, Wei-Hao Bian, Xiao-Lei Jiang +1
The variability of broad absorption lines is investigated for a sample of 188 broad-absorption-line (BAL) quasars (QSOs) () with at least two-epoch observations from the S…