89 citations · 554 across the 43 of their papers we have counts for
44 papers
Dynamical chiral symmetry breaking in rotating QED: critical flavor number and the occupation-reweighting channel
Wei Li
We study dynamical chiral symmetry breaking in -dimensional QED on a rigidly rotating disc, , within the rainbow Schwinger--Dyson framework. At zero temperature the…
Neutron Star Mass-Radius Constraints for EXO 0748676 from 2008-2025 Quiescent X-ray Spectra
Mingyang Wang, Guobao Zhang, Ang Li
We present new constraints on the mass and radius of the neutron star in the neutron star low-mass X-ray binary EXO 0748676 obtained from a joint analysis of 20 quiescent X-ray…
Multiwavelength Analysis of the Einstein Probe X-ray Transient EP240305a
Ruican Ma, Ye Li, Lian Tao +32
We report multiwavelength observations of EP240305a, an uncatalogued X-ray transient detected by the Einstein Probe on March 5, 2024. The source exhibits distinct characteristics a…
Marginally stable nuclear burning triggered at different depths of the neutron star surface in Low-mass X-ray binary 4U 1608-52
Lyu Ming, Zhang Guobao, Mendez Mariano +1
We investigated the timing and spectral properties of the millihertz quasi-periodic oscillations (mHz QPOs) in the neutron-star low-mass X-ray binary 4U 1608-52 using NICER observa…
Evidence for enhanced mass transfer in the disc preceding the transition to the soft state in MAXI J1820+070
Pengcheng Yang, Guobao Zhang, David M. Russell +6
We investigate the 2018-2019 main outburst and the subsequent mini-outbursts of the black hole low-mass X-ray binary MAXI J1820+070 using optical/ultraviolet data from the Las Cumb…
Dense Matter in Neutron Stars with eXTP
Ang Li, Anna L. Watts, Guobao Zhang +82
In this White Paper, we present the potential of the enhanced X-ray Timing and Polarimetry (eXTP) mission to constrain the equation of state of dense matter in neutron stars, explo…
The enhanced X-ray Timing and Polarimetry mission -- eXTP for launch in 2030
Shuang-Nan Zhang, Andrea Santangelo, Yupeng Xu +155
In this paper we present the current status of the enhanced X-ray Timing and Polarimetry mission, which has been fully approved for launch in 2030. eXTP is a space science mission…
Timing analysis of the black-hole candidate Swift J1727.8-1613: detection of a dip-like feature in the high-energy cross spectrum
Pei Jin, Mariano Méndez, Federico García +3
We present a timing analysis of observations with the Hard X-ray Modulation Telescope of the black hole X-ray transient Swift J1727.8-1613 during its 2023 outburst. We detect, for…
Insight-HXMT observations of the 2023 outburst in Aql X-1
Zhe Yan, Guobao Zhang, Yu-Peng Chen +5
We conducted an analysis of the continuum during the onset and initial decline phases of the 2023 outburst in transient neutron star low-mass X-ray binary Aql X1 using broadband…
Spectral properties of the neutron star low-mass X-ray binary 4U 1636-53, XTE J1739-285 and MAXI J1816-195
Zhenyan Fei, Ming Lyu, Guobao Zhang +2
We investigated simultaneous NICER plus NuSTAR observations of three neutron star low-mass X-ray binary 4U 1636-53, XTE J1739-285 and MAXI J1816-195 using the latest reflection mod…
Science objectives of the Einstein Probe mission
Weimin Yuan, Lixin Dai, Hua Feng +93
The Einstein Probe (EP) is an interdisciplinary mission of time-domain and X-ray astronomy. Equipped with a wide-field lobster-eye X-ray focusing imager, EP will discover cosmic X-…
Determining the nature of IC 10 X-2: A comprehensive study of the Optical/Infrared emission from an extragalactic BeHMXB
Jwaher Alnaqbi, Joseph D. Gelfand, Payaswini Saikia +7
We present a comprehensive analysis of the optical and infrared (IR) properties of high-mass X-ray binary (HMXB) IC 10 X-2, classified as a super-giant HMXB and super-fast X-ray tr…
Radiation mechanism of twin kilohertz quasi-periodic oscillations in neutron star low mass X-ray binaries
ChangSheng Shi, GuoBao Zhang, ShuangNan Zhang +1
Context: The connection between quasi-periodic oscillations (QPOs) and magnetic fields has been investigated across various celestial bodies. Magnetohydrodynamics (MHD) waves have…
Investigation into the origin of the soft excess in Ark 564 using principal component analysis
Ming Lyu, Zhenyan Fei, Guobao Zhang +1
We combined a principal component analysis (PCA) and spectroscopy to investigate the origin of the soft excess in narrow-line Seyfert 1 galaxy Ark 564 with XMM-Newton observations…
The bright black hole X-ray binary 4U 1543-47 during 2021 outburst. A clear state transition from super-Eddington to sub-Eddington accretion revealed by Insight-HXMT
Pei Jin, Guobao Zhang, Yuexin Zhang +9
We present a detailed analysis of the observations with the Hard X-ray Modulation Telescope of the black hole X-ray transient 4U~1543-47 during its outburst in 2021. We find a clea…
Insight-HXMT observations of thermonuclear X-ray bursts in 4U 1636-53
Zhe Yan, Guobao Zhang, Yu-Peng Chen +9
We conducted an analysis of 45 bursts observed from 4U 163653. To investigate the mechanism behind the light curve profiles and the impact of thermonuclear X-ray bursts on the a…
A systematic study of the high-frequency bump in the black-hole low-mass X-ray binary GX 339-4
Yuexin Zhang, Mariano Méndez, Sara E. Motta +8
The high-frequency bump, characterized by a frequency exceeding ~30 Hz, represents a seldom-explored time-variability feature in the power density spectrum (PDS) of black-hole X-ra…
Investigation into the reflection properties of the neutron star low-mass X-ray binary 4U 1636-53
Ming Lyu, Guobao Zhang, H. G. Wang +1
We present the spectroscopy of the neutron star low-mass X-ray binary 4U 1636-53 using six simultaneous XMM-Newton and Rossi X-ray Timing Explorer observations. We applied differen…
Properties of the optical component stars in X-ray binary systems
Jia Zhang, Sheng-Bang Qian, Guo-Bao Zhang +1
We collected a total of 4,058 X-ray binary stars, out of which 339 stars had three atmospheric parameters for optical companions from Gaia and LAMOST, while 264 stars had masses an…
The origin of UV/optical emission in the black hole low-mass X-ray binary Swift J1753.5-0127
Pengcheng Yang, Guobao Zhang, David M. Russell +4
The emission from the accreting black holes (BHs) in low-mass X-ray binaries (LMXBs) covers a broad energy band from radio to X-rays. Studying the correlations between emission in…
The harmonic component of the millihertz quasi-periodic oscillations in 4U 1636-53
Zhenyan Fei, Ming Lyu, Mariano Mendez +5
We studied the harmonics of the millihertz quasi-periodic oscillations (mHz QPOs) in the neutron-star low-mass X-ray binary 4U 1636-53 using the Rossi X-ray Timing Explorer observa…
The study of multi-peaked type-I X-ray bursts in the neutron-star low mass X-ray binary 4U 1636536 with RXTE
Chen Li, Guobao Zhang, Mariano Méndez +2
We have found and analysed 16 multi-peaked type-I bursts from the neutron-star low mass X-ray binary 4U 163653 with the Rossi X-ray Timing Explorer (RXTE). One of the bursts is…
XMM-Newton and NICER measurement of the rms spectrum of the millihertz quasi-periodic oscillations in the neutron-star low-mass X-ray binary 4U 1636-53
Ming Lyu, Guobao Zhang, Mariano Mendez +4
We used two XMM-Newton and six Neutron Star Interior Composition Explorer (NICER) observations to investigate the fractional rms amplitude of the millihertz quasi-periodic oscillat…
Discovery of an accretion-rate independent absolute RMS amplitude of millihertz quasi-periodic oscillations in 4U 1636-53
Ming Lyu, Mariano Mendez, D. Altamirano +2
We investigate the frequency and amplitude of the millihertz quasi-periodic oscillations (mHz QPOs) in the neutron-star low-mass X-ray binary (NS LMXB) 4U 1636-53 using Rossi X-ray…