4 papers
A Short-timescale Negative Optical Continuum Lag in SDSS J083717.88+191647
Chen MuLin, Cheng PeiZhen, Chen XingQian +4
Continuum reverberation mapping (RM) is a powerful technique for constraining the accretion disk structure in active galactic nuclei (AGNs). In typical cases, the shorter-wavelengt…
Optical QPOs with different periodicities in CSS and ZTF light curves of the quasar 4C 50.43
Liao GuiLin, Chen XingQian, Cheng PeiZhen +1
Long-standing optical quasi-periodic oscillations (QPOs) with periodicity of hundreds to thousands of days have been accepted as indicators for central sub-pc binary black hole sys…
Variability of optical spectral index to support a central sub-parsec binary black hole system in quasar SDSS J001224-102226.51
Zhang XueGuang
In this manuscript, variations in optical spectral index are applied for detecting central sub-parsec binary black hole systems (sub-pc BBHs) in broad line active galact…
Very blue-shifted broad H in a low redshift Type-1.9 AGN: a disk emitter or a recoiling black hole scenario
XueGuang Zhang
In this manuscript, very blue-shifted broad H with shifted velocity 2200km/s is reported in the low redshift Type-1.9 AGN SDSS J1052+1036. Blue-shifted broad emission line…