From the 1 of 8 linked papers with an AI index.
8 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
The paper presents timing and spectral observations of the 2024 outburst of the Be/X‑ray binary pulsar 2S 1553‑542 using NuSTAR and NICER, measuring a 9.285 s pulse period, detecti…
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…