15 citations · 33 across the 10 of their papers we have counts for
11 papers
Cross-spectral Analysis of the Type-C Quasi-periodic Oscillation Shoulder Component in GX 339-4
Haifan Zhu, Mariano Méndez, Pengcheng Yang +8
We revisit Rossi X-ray Timing Explorer (RXTE) observations of GX~3394 during the rising phase of its 2006/2007 outburst and apply a joint power-density-spectrum (PDS)--cross-spe…
Timing and Spectral Analysis of the 2024 Outburst of 2S 1553542 with NuSTAR and NICER
Haifan Zhu, Wei Wang, Wen Yang +4
We report a timing and spectral study of the 2024 outburst of the Be/X-ray binary pulsar 2S~1553542 using \textit{NuSTAR} and \textit{NICER} observations. From the \textit{NuSTA…
Timing and spectral analysis of the 2025 outburst of 4U 163047 with \textit{NICER}
Haifan Zhu, Mariano Méndez, Xiao Chen +1
We analyzed \textit{NICER} observations of the 2025 outburst of the black hole X-ray binary 4U~163047 to investigate the spectral--timing properties of its transient low-frequen…
Quasi-periodic oscillations of GHz-band polarization in a black hole
Wei Wang, Jiashi Chen, Pengfu Tian +10
Relativistic jets from accreting black holes (BHs) radiate non-thermal emission which is highly variable in different time scales. Magnetic fields anchored to a rotating BH or accr…
Estimating the Black Hole Spin for the X-Ray Binary MAXI J1727-203 Based on Insight-HXMT
Haifan Zhu, Wei Wang
We constrain the spin of the black hole (BH) candidate MAXI J1727-203 using Insight-HXMT data. Due to limited HXMT observations covering only part of the outburst, NICER data were…
A White Dwarf Binary Candidate Discovered by LAMOST Using Dynamical Method
Haifan Zhu, Wei Wang, Xue Lib +2
We present the discovery of a binary system containing a white dwarf candidate using data from the LAMOST. Our analysis of the radial velocity data allowed us to determine an orbit…
The bicoherence analysis of type C quasi-periodic oscillations in Swift J1727.8-1613
Haifan Zhu, Wei Wang, Ziyuan Zhu
We present the results of bicoherence analysis for Swift J1727.8-1613 during its 2023 outburst, using data from Insight-HXMT. Our analysis focused on observations with quasi-period…
Energy dependence of the low-frequency quasi-periodic oscillations in Swift J1727.8-1613
Haifan Zhu, Wei Wang
Based on observations from the Insight-Hard X-ray Modulation Telescope (Insight-HXMT), an analysis of Type-C quasi-periodic oscillations (QPOs) observed during the outburst of the…
Timing Analysis of a New Black Hole Candidate MAXI J1803-298 with Insight-HXMT and NICER
Haifan Zhu, Xiao Chen, Wei Wang
We present the timing analysis results of MAXI J1803298, a black hole candidate, during its 2021 outburst using data obtained from the \textit{Insight-}HXMT and \textit{NICER} t…
A moderate spin for the black hole in X-ray binary MAXI J1348-630 revealed by Insight-HXMT
Hanji Wu, Wei Wang, Na Sai +2
MAXI J1348-630 is a low-mass X-ray black hole binary located in the Galaxy and undergone the X-ray outburst in 2019. We analyzed the observation data in very soft state during the…
Element abundance analysis of the metal-rich stellar halo and high-velocitythick disk in the galaxy
Haifan Zhu, Cuihua Du, Yepeng Yan +3
Based on the second Gaia data release (DR2) and APOGEE (DR16) spectroscopic surveys, wedefined two kinds of star sample: high-velocity thick disk (HVTD) with and metal-…