Shuang‐Liang Li
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View article: Disk Instability Model for Quasi-periodic Eruptions: Investigating Period Dispersion and Peak Temperature
Disk Instability Model for Quasi-periodic Eruptions: Investigating Period Dispersion and Peak Temperature Open
Quasi-periodic eruptions (QPEs) are a class of X-ray repeating burst phenomena discovered in recent years. Although many models have been proposed to study this phenomenon, there remains significant debate regarding the physical origin of …
View article: The Physical Mechanism of Radio-quiet Turn-on Changing-look Active Galactic Nuclei
The Physical Mechanism of Radio-quiet Turn-on Changing-look Active Galactic Nuclei Open
It is suggested that the variation of the mass accretion rate in the accretion disk may be responsible for the occurrence of most changing-look active galactic nuclei (CL AGNs). However, the viscous timescale of a thin disk is far longer t…
View article: Disk Instability Model for Quasi-Periodic Eruptions: Investigating Period Dispersion and Peak Temperature
Disk Instability Model for Quasi-Periodic Eruptions: Investigating Period Dispersion and Peak Temperature Open
Quasi-periodic eruptions (QPEs) are a class of X-ray repeating burst phenomena discovered in recent years. Many models have been proposed to study this phenomenon, there remains significant debate regarding the physical origin of QPEs. In …
View article: The physical mechanism of radio-quiet turn-on changing-look active galactic nuclei
The physical mechanism of radio-quiet turn-on changing-look active galactic nuclei Open
It is suggested that the variation of mass accretion rate in accretion disk may be responsible for the occurrence of most changing-look active galactic nuclei (CL AGNs). However, the viscous timescale of a thin disk is far longer than the …
View article: Reverberation Evidence for Stream Collision and Delayed Disk Formation in Tidal Disruption Events
Reverberation Evidence for Stream Collision and Delayed Disk Formation in Tidal Disruption Events Open
When a star passes through the tidal disruption radius of a massive black hole (BH), it can be torn apart by the tidal force of the BH, known as the tidal disruption event (TDE). Since the observed UV/optical luminosity significantly excee…
View article: Do All the Quasars and High-excitation Radio Galaxies (HERGs) in the 3CRR Catalog Contain a Magnetically Arrested Disk (MAD)?
Do All the Quasars and High-excitation Radio Galaxies (HERGs) in the 3CRR Catalog Contain a Magnetically Arrested Disk (MAD)? Open
Based on the magnetization, an accretion disk with a large-scale magnetic field can be separated into either standard and normal evolution or magnetically arrested disk (MAD), which are difficult to identify from observations. It is still …
View article: Do all the quasars and high-excitation radio galaxies (HERGs) in the 3CRR catalog contain a magnetically arrested disk (MAD)?
Do all the quasars and high-excitation radio galaxies (HERGs) in the 3CRR catalog contain a magnetically arrested disk (MAD)? Open
Based on the magnetization, an accretion disk with large-scale magnetic field can be separated into either standard and normal evolution (SANE) or magnetically arrested disk (MAD), which are difficult to identify from observations. It is s…
View article: Reverberation evidence for Stream Collision and Delayed Disk Formation in Tidal Disruption Events
Reverberation evidence for Stream Collision and Delayed Disk Formation in Tidal Disruption Events Open
When a star passes through the tidal disruption radius of a massive black hole (BH), it can be torn apart by the tidal force of the BH, known as the Tidal Disruption Event (TDE). Since the observed UV/optical luminosity significantly excee…
View article: Time-dependent global simulations of a thin accretion disc: the effects of magnetically-driven winds on thermal instability
Time-dependent global simulations of a thin accretion disc: the effects of magnetically-driven winds on thermal instability Open
According to the standard thin disc theory, it is predicted that the radiation-pressure-dominated inner region of a thin disc is thermally unstable, while observations suggest that it is common for a thin disc of more than 0.01 Eddington l…
View article: Application of the Disk Instability Model to All Quasiperiodic Eruptions
Application of the Disk Instability Model to All Quasiperiodic Eruptions Open
After the first quasiperiodic eruption (QPE; GSN 069) was reported in 2019, four other sources have been identified as a QPE or a candidate. However, the physics behind QPEs is still unclear, although several models have been proposed. Pan…
View article: Application of the disk instability model to all Quasi-Periodic Eruptions
Application of the disk instability model to all Quasi-Periodic Eruptions Open
After the first quasi-periodic eruptions (QPEs, GSN069) was reported in 2019, four other sources have been identified as QPEs or its candidate. However, the physics behind QPEs is still unclear so far, though several models have been propo…
View article: Constraining X-ray emission of magnetically arrested disk (MAD) by radio-loud AGNs with extreme ultraviolet (EUV) deficit
Constraining X-ray emission of magnetically arrested disk (MAD) by radio-loud AGNs with extreme ultraviolet (EUV) deficit Open
Aims. Active galactic nuclei (AGNs) with EUV deficit are suggested to be powered by a MAD surrounding the black hole, where the slope of EUV spectra ($α_{\rm EUV}$) is found to possess a well positive relationship with the jet efficiency. …
View article: A Disk Instability Model for the Quasi-periodic Eruptions of GSN 069
A Disk Instability Model for the Quasi-periodic Eruptions of GSN 069 Open
GSN 069 is a recently discovered quasi-periodic eruption (QPE) source recurring about every 9 hr. The mechanism for the QPEs of GSN 069 is still unclear. In this work, a disk instability model is constructed to explain GSN 069 based on Pan…
View article: The origin of X-ray emission in 3CRR sources: Hints from mid-infrared <i>Spitzer</i> observations
The origin of X-ray emission in 3CRR sources: Hints from mid-infrared <i>Spitzer</i> observations Open
Aims. Whether X-ray emission in radio-loud (RL) active galactic nuclei (AGNs) originates from disk coronae or jets is still under debate. For example, the positive relationships in radio-quiet AGNs (such as the optical to X-ray spectral in…
View article: The origin of X-ray emission in 3CRR sources: hints from mid-infrared Spitzer observations
The origin of X-ray emission in 3CRR sources: hints from mid-infrared Spitzer observations Open
Whether X-ray emission in radio-loud (RL) active galactic nuclei (AGNs) originates from disk coronae or jets is still under debate. For example, the positive relationships in radio-quiet (RQ) AGNs (such as the optical to X-ray spectral ind…
View article: The Effects of Large-scale Magnetic Fields on the Model for Repeating Changing-look AGNs
The Effects of Large-scale Magnetic Fields on the Model for Repeating Changing-look AGNs Open
Periodic outbursts are observed in several changing-look (CL) active galactic nuclei (AGNs). Sniegowska et al. suggested a model to explain the repeating CL in these AGNs, where the periodic outbursts are triggered in a narrow unstable zon…
View article: A nearby luminous AGN sample optically selected from Hubble Space Telescope
A nearby luminous AGN sample optically selected from Hubble Space Telescope Open
In this work, a nearby luminous active galactic nucleus (AGN) sample is selected from Hubble Space Telescope(HST), where only sources with both X-ray emission observed by Chandra/XMM–Newton and radio flux detected by Very Large Array (VLA)…
View article: The black hole fundamental plane in low-excitation radio galaxies
The black hole fundamental plane in low-excitation radio galaxies Open
The radio–X-ray slope in the fundamental plane of radio-loud active galactic nuclei (AGNs) has been found to be steeper than that of radio-quiet AGNs in previous studies. In this paper, we reinvestigate the fundamental plane in radio-loud …
View article: A strong negative correlation between radio loudness RUV and optical-to-X-ray spectral index αox in low-luminosity AGNs
A strong negative correlation between radio loudness RUV and optical-to-X-ray spectral index αox in low-luminosity AGNs Open
It has been argued for years that the accretion mode changes from bright\nactive galactic nuclei (AGNs) to low-luminosity AGNs (LLAGNs) at a rough\ndividing point of bolometric Eddington ratio $\\lambda \\sim 10^{-2}$. In this\nwork, we st…
View article: A thin disk model for the high efficiency jet in powerful lobe-dominated FRII radio galaxies
A thin disk model for the high efficiency jet in powerful lobe-dominated FRII radio galaxies Open
We propose a thin accretion disk with magnetically driven winds model to investigate the high jet efficiency phenomenon in lobe-dominated luminous FRII radio galaxies, which was reported by Fernandes et al. (2011) and Punsly (2011). It was…
View article: An accretion disc-irradiation hybrid model for the optical/UV variability in radio-quiet quasars
An accretion disc-irradiation hybrid model for the optical/UV variability in radio-quiet quasars Open
The optical/ultraviolet (UV) variability of quasars has been discovered to be correlated with other quasar properties, such as luminosity, black hole mass and rest-frame wavelength. However, the origin of variability has been a puzzle so f…
View article: State transitions triggered by inverse magnetic field: probably applied in high-mass X-ray binaries?
State transitions triggered by inverse magnetic field: probably applied in high-mass X-ray binaries? Open
Previous works suggested that the state transitions in an X-ray binary can be triggered by accreting inverse magnetic field from its companion star. A key point of this mechanism is the accretion and magnification of large-scale magnetic f…
View article: EFFECTS OF WINDS ON THE STABILITY OF A THIN DISK
EFFECTS OF WINDS ON THE STABILITY OF A THIN DISK Open
Standard thin disk theory predicts that an inner disk region dominated by radiation pressure is thermally unstable. However, this kind of instability isn't detected in the observations of X-ray binaries. In this work, we revisit this issue…