83 citations · 683 across the 36 of their papers we have counts for
36 papers
Observations of a black hole X-ray binary indicate formation of a magnetically arrested disk
Bei You, Xinwu Cao, Zhen Yan +8
Accretion of material onto a black hole drags any magnetic fields present inwards, increasing their strength. Theory predicts that sufficiently strong magnetic fields can halt the…
An apparent positive relation between spin and orbital angular momentum in X-ray binaries
Zhen Yan, Wenda Zhang, Wenfei Yu
The origin of current angular momentum (AM) of the black hole (BH) in X-ray binary (XRB) is still unclear, which is related with the birth and/or the growth of the BH. Here we coll…
Temporal and Spectral Properties of the Persistent Radio Source Associated with FRB 20190520B with the VLA
Xian Zhang, Wenfei Yu, Casey Law +12
Among more than 800 known fast radio bursts (FRBs), only two, namely FRB 20121102A and FRB 20190520B, are confirmed to be associated with a persistent radio sources (PRS). Here we…
A new variability pattern in GRS 1915+105 with NICER and Insight-HXMT observations
Zhihong Shi, Qingwen Wu, Zhen Yan +2
We explore the timing and spectral properties of GRS 1915+105 based on X-ray observations of NICER and Insight-HXMT during the long outburst from 2017 to 2021. We find a new class…
The width-flux relation of the broad iron line during the state transition of the black hole X-ray binaries
Hang-Ying Shui, Fu-Guo Xie, Zhen Yan +1
The observation of varying broad iron lines during the state transition of the black hole X-ray binaries (BHXBs) have been accumulating.In this work, the relation between the norma…
X-ray spectral correlations in a sample of Low-mass black hole X-ray binaries in the hard state
Bei You, Yanting Dong, Zhen Yan +4
The power-law emission and reflection component provide valuable insights into the accretion process around a black hole. In this work, thanks to the broadband spectra coverage of…
Low Frequency Quasi-periodic Oscillation in MAXI J1820+070: Revealing distinct Compton and Reflection Contributions
Chenxu Gao, Zhen Yan, Wenfei Yu
X-ray low frequency quasi-periodic oscillations (LFQPOs) of black hole X-ray binaries, especially those type-C LFQPOs, are representative timing signals of black hole low/hard stat…
Investigating galactic double white dwarfs for sub-milliHz gravitational wave mission ASTROD-GW
Gang Wang, Zhen Yan, Bin Hu +1
A large number of galactic binary systems emit gravitational waves (GW) continuously with frequencies below 10 mHz. The LISA mission could identify tens of thousands of binar…
A Q-band line survey towards Orion KL using the Tianma radio telescope
Xunchuan Liu, Tie Liu, Zhiqiang Shen +28
We have conducted a line survey towards Orion KL using the Q-band receiver of Tianma 65 m radio telescope (TMRT), covering 34.8--50 GHz with a velocity resolution between 0.79 km s…
An Eclipsing Black Widow Pulsar in NGC 6712
Zhen Yan, Zhi-chen Pan, Scott M. Ransom +9
We report the discovery of the first radio pulsar associated with NGC 6712, an eclipsing black widow (BW) pulsar, J18530842A, found by high-sensitivity searches using the Five-h…
A magnetic accretion disk-outflow model for state transition in X-ray binaries
Xinwu Cao, Bei You, Zhen Yan
The hard to soft state transition of the outbursts in X-ray binaries (XRBs) is triggered by the rising of the mass accretion rate due to the disk instability. In order to explain t…
FAST Globular Cluster Pulsar Survey: Twenty-Four Pulsars Discovered in Fifteen Globular Clusters
Zhichen Pan, Lei Qian, Xiaoyun Ma +8
We present the discovery of 24 pulsars in 15 Globular Clusters (GCs) using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). These include the first pulsar discover…
Long-term and multi-wavelength evolution of a changing-look AGN Mrk 1018
Bing Lyu, Zhen Yan, Wenfei Yu +1
The physical mechanism for triggering the changing-look phenomenon in active galactic nuclei (AGNs) is still unclear. We explore this issue based on the multi-wavelength spectral a…
Simultaneous 2.25/8.60 GHz observations of the newly discovered magnetar -- Swift J1818.0-1607
Zhi-Peng Huang, Zhen Yan, Zhi-Qiang Shen +7
Swift J1818.0-1607 discovered in early 2020 is not only the fifth magnetar known with periodic radio pulsations but also the fastest rotating one. Simultaneous 2.25 and 8.60 GHz ob…
Detection of a low frequency quasi-periodic oscillation in the soft state of Cygnus X-1 with Insight-HXMT
Zhen Yan, Stefano Rapisarda, Wenfei Yu
We report the detection of a short-lived narrow quasi-periodic oscillation (QPO) at ~88 mHz in an Insight-HXMT observation during the soft state of the persistent black hole high m…
X-ray flares from the stellar tidal disruption by a candidate supermassive black hole binary
Xinwen Shu, Wenjie Zhang, Shuo Li +8
Optical transient surveys have led to the discovery of dozens of stellar tidal disruption events (TDEs) by massive black hole in the centers of galaxies. Despite extensive searches…
New timing measurement results of 16 pulsars
Jie Liu, Zhen Yan, Zhi-Qiang Shen +5
Pulsar's position, proper motion and parallax are important parameters in timing equations. It is a really challenging work to fit astrometric parameters accurately through pulsar…
Coronal properties of black hole X-ray binaries in the hard state as seen by NuSTAR and Swift
Zhen Yan, Fu-guo Xie, Wenda Zhang
In this work, we measure two important phenomenological parameters of corona (and hot accretion flow) in black hole X-ray binaries: the photon index and the electron temperatur…
Evidence for changing-look AGNs is caused by change of accretion mode
Hao liu, Qingwen Wu, Bing Lyu +1
The discovery of changing-look active galactic nuclei (CL AGNs), with appearance and disappearance of broad emission lines and/or with strong variation of line-of-sight column dens…
Radio/X-ray Correlation in the Mini-Outburts of Black Hole X-ray Transient GRS 1739--278
Fu-Guo Xie, Zhen Yan, Zhongzu Wu
We present quasi-simultaneous radio and X-ray observations of the black hole X-ray binary GRS 1739--278 of its 2015-2016 mini-outbursts, i.e. between 2015 June 10 and 2016 October…
The relation between outburst rate and orbital period in low-mass X-ray binary transients
Jie Lin, Zhen Yan, Zhanwen Han +1
We have investigated the outburst properties of low-mass X-ray binary transients (LMXBTs) based on a comprehensive study of the outbursts observed in the past few decades. The outb…
One large glitch in PSR B1737-30 detected with the TMRT
Jie Liu, Zhen Yan, Jian-Ping Yuan +5
One large glitch was detected in PSR B173730 using data spanning from MJD 57999 to 58406 obtained with the newly built Shanghai Tian Ma Radio Telescope (TMRT). The glitch took p…
Revealing two radio active galactic nuclei extremely near PSR J04374715
Zhixuan Li, Jun Yang, Tao An +9
Newton's gravitational constant may vary with time at an extremely low level. The time variability of will affect the orbital motion of a millisecond pulsar in a binary sys…
A decades-long fast-rise-exponential-decay flare in low-luminosity AGN NGC 7213
Zhen Yan, Fu-Guo Xie
We analysed the four-decades-long X-ray light curve of the low-luminosity active galactic nucleus (LLAGN) NGC 7213 and discovered a fast-rise-exponential-decay (FRED) pattern, i.e.…