84 citations · 145 across the 4 of their papers we have counts for
Showing astro-phShow all
2 papers · 1 filter
astro-ph2004
The mass estimate in narrow-line Seyfert 1 galaxies
W. Bian, Y. Zhao
It is possible that narrow-line Seyfert 1 galaxies (NLS1s) are in the early stage of active galactic nuclei (AGNs) evolution. It is important to estimate the mass of supermassive b…
astro-ph2003★ 84 cited
On X-ray variability in narrow line and broad line AGNs
W. Bian, Y. Zhao
We assembled a sample of broad line and narrow lines AGNs observed by ASCA, whose excess variances have been determined. The central black hole masses in this sample can be obtaine…