15 citations · 19 across the 15 of their papers we have counts for
16 papers
Weighing Hidden Companions of Compact Object Candidates via Rotational Broadening
Rui Wang, Zhi-Xiang Zhang, Wei-Min Gu +3
The determination of unseen companion masses () is essential for identifying compact objects in binary systems, yet obtaining reliable orbital inclinations remains one of the…
Light curve modeling of the nearest neutron star candidate LAMOST J235456.73+335625.9
Qing-bo Han, Mouyuan Sun, Zhi-Xiang Zhang +1
The discovery of heavy radioactive elements (e.g., ) on Earth suggests that supernova explosions may have occurred near our planet within the past million years,…
A Study of Cataclysmic Variables from the eFEDS Survey
Rui Wang, Wei-Min Gu, Zhi-Xiang Zhang +3
We present 17 cataclysmic variables (CVs) obtained from the crossmatch between the Sloan Digital Sky Survey (SDSS) and eROSITA Final Equatorial Depth Survey (eFEDS), including 8 kn…
Discovery of Repeating Transitions in 16 Changing-look Active Galactic Nuclei
Qian Dong, Zhi-Xiang Zhang, Wei-Min Gu +5
The repeating changing-look active galactic nuclei (RCL AGNs) exhibit multiple appearances and disappearances of broad emission lines (BELs), whose underlying mechanism remains a p…
An H Cloud in the HI Tail: Recent Star Formation in the Outskirts of NGC 4258 Revealed by Nanshan 1-m Telescope
Cheng Cheng, Jia-Sheng Huang, Peng Wei +12
We present first-light deep H imaging taken with the Nanshan 1-meter wide-field telescope on the local galaxy NGC 4258, alongside archival data from Hubble Space telescope (HST)…
A Sandwich Model for Changing-Look AGNs
Qian-Qi Ma, Wei-Min Gu, Zhen-Yi Cai +4
The spectral variability of changing-look active galactic nuclei (CL-AGNs) occurred on timescales of years to tens of years, posing a significant challenge to the standard thin dis…
A Sample of Extreme Eclipsing Binaries with Accretion Disks from LAMOST and ZTF
Jiangxinxin Zhuang, Zhi-Xiang Zhang, Wei-Min Gu +1
Extreme eclipsing binaries may harbor peculiar physical properties. In this work, we aim to identify a sample of such systems by selecting binaries with pronounced eclipsing light…
SMBH binary candidate PKS J2134-0153: Possible multi-band periodic variability and inter-band time lags
Guowei Ren, Mouyuan Sun, Nan Ding +2
Studying the periodic flux-variation behavior of blazars is vital for probing supermassive black hole binaries and the kinematics of relativistic jets. In this work, we report the…
The disk reverberation mapping of the lensed quasar Q0957+561
Marcin Marculewicz, Mouyuan Sun, Zhixiang Zhang +1
The measurement of continuum time lags in lensed quasars can effectively probe the accretion physics of quasars. This is because microlensing observations of lensed quasars can pro…
Newly Discovered Changing-look Active Galactic Nuclei from SDSS and LAMOST Surveys
Qian Dong, Zhi-Xiang Zhang, Wei-Min Gu +2
Changing-look Active Galactic Nuclei (CL AGNs) exhibit drastic variations in broad emission lines (BELs), the mechanism of which remains unclear. Expanding the sample of CL AGNs is…
Two Dynamically Discovered Compact Object Candidate Binary Systems from LAMOST Low-resolution Survey
Senyu Qi, Wei-Min Gu, Zhi-Xiang Zhang +3
We report two binary systems, LAMOST J035540+381550 (hereafter J035540) and LAMOST J035916+400732 (hereafter J035916), identified through the Large Sky Area Multi-Object Fiber Spec…
A Sample of Compact Object Candidates in Single-lined Spectroscopic Binaries from LAMOST Medium Resolution Survey
Hao-Bin Liu, Wei-Min Gu, Zhi-Xiang Zhang +3
The stellar spectra from LAMOST Medium Resolution Survey can be used to search for compact objects in binaries. The LAMOST DR10 catalog includes > 980, 000 targets with multiple me…
A reverberation mapping study of a highly variable AGN 6dFGS gJ022550.0-060145
Danyang Li, Mouyuan Sun, Junfeng Wang +2
We use LCOGT observations (MJD ) with a total exposure time of hours and a median cadence of days to measure the inter-band time delays (with respect…
The hidden companion in J1527: a 0.69 solar-mass white dwarf?
Zhi-Xiang Zhang, Hao-Bin Liu, Tuan Yi +2
Finding nearby neutron stars can probe the supernova and metal-enrichment histories near our Solar system. Recently, Lin et al. 2023 reported an exciting neutron star candidate, 2M…
Corona-heated Accretion-disk Reprocessing: Frequency-Resolved Lag Predictions for UV/Optical Reverberation Mapping of Active Galactic Nuclei
Jie Chen, Mouyuan Sun, Zhi-Xiang Zhang
Continuum reverberation mapping with high-cadence, long-term UV/optical monitoring of Active Galactic Nuclei (AGNs) enables us to resolve the AGN central engine sizes on different…
White Dwarfs with Infrared Excess from LAMOST Data Release 5
Lin Wang, Xiaoxia Zhang, Junfeng Wang +5
Infrared excess is an important probe of sub-stellar companions and/or debris disks around white dwarfs (WDs). Such systems are still rare for in-depth understanding of their forma…