158 citations · 693 across the 44 of their papers we have counts for
44 papers
A candidate of binary black hole system in AGN with broad Balmer emission lines having quite different line widths
XueGuang Zhang
In the manuscript, a candidate of sub-pc binary black hole (BBH) system is reported in SDSS J1257+2023 through different properties of broad Balmer emission lines. After subtractio…
Central BH mass of tidal disruption event candidate SDSS J0159 through long-term optical variabilities
XueGuang Zhang
In this manuscript, central BH mass is determined in the tidal disruption event (TDE) candidate SDSS J0159, through the nine years long variabilities, in order to check whether the…
Systematic research of low redshift optically selected SDSS Type-2 AGN but with apparent long-term optical variabilities from Catalina Sky Survey, I: data sample and basic results
Zhang XueGuang
The main objective of the paper, the first paper in a dedicated series, is to report basic results on systematic research of low-redshift optically selected SDSS Type-2 AGN but wit…
Evidence to disfavour dual core system leading to double-peaked narrow emission lines
Zhang XueGuang, Zheng Qi
In this manuscript, an interesting method is proposed to test dual core system for double-peaked narrow emission lines, through precious dual core system with double-peaked narrow…
A practicable estimation of opening angle of dust torus in Type-1.9 AGN with double-peaked broad H
XueGuang Zhang
In this manuscript, an independent method is proposed to estimate opening angle of dust torus in AGN, through unique properties of Type-1.9 AGN with double-peaked broad H (Type-…
Velocity offset between emission and absorption lines might be an effective indicator of dual core system
Qi Zheng, Shuang Liu, Xueguang Zhang +1
This paper presents a detection of significant velocity offset between emission and absorption lines for a dual core system in SDSS~J155708.82+273518.74 (= SDSS~J1557). The photome…