M. Y. Ge

Quasiperiodic Oscillation of RE J1034+396 Diagnosed with Phase-resolved Spectral Analysis

W Li, Shiyu Zhang, Qing-Cang Shui, Yupeng Chen et autres

Abstract We analyze 10 XMM-Newton observations of the narrowline Seyfert 1 galaxy RE J1034+396 to investigate the origin of its quasiperiodic oscillation (QPO). Using the Hilbert–Huang Transform, we perform the first systematic phase-resolved X-ray spectral analysis of this source. We report that …

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X-ray burst associated to FRB200428 with Insight-HXMT

M. Y. Ge, Liu C.Z, Shuang‐Nan Zhang, F. J. Lu et autres

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Eclipsed X-Ray Bursts from Magnetar SGR J1935+2154 and the Fireball Measurements

Sheng-Lun Xie, Aming Chen, Yun-Wei Yu, S. L. Xiong et autres

Abstract In theory, burst activity of the magnetar can lead to the formation of fireballs trapped by the magnetic field and corotating with the star. However, smoking-gun observational evidence of the fireball is elusive. We envisage that the fireball emission should occasionally …

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Long-term Timing Evolution of Four Anomalous X-Ray Pulsars

Hongling Peng, Shanshan Weng, M. Y. Ge, Shiqi Zhou et autres

Abstract Anomalous X-ray pulsars (AXPs) and soft gamma-ray repeaters (SGRs) are believed to be manifestations of magnetars. Typically, AXPs exhibit higher X-ray luminosities, whereas SGRs are generally fainter and display significantly high signal-to-noise ratios only during their outburst phases. In this work, …

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Investigation of the Quasi-periodic Oscillation Phase Lag of RE J1034+396

Wen-Zhong Li, Shu Zhang, Qing-Cang Shui, Yupeng Chen et autres

Abstract We conduct an in-depth study of the quasi-periodic oscillation (QPO) properties of RE J1034+396 by constructing QPO phase-folded light curves from 10 XMM-Newton observations during 2020–2021. Our analysis reveals that the QPO in the source exhibits two mutually convertible lag-energy modes: …

The Orbital Parameters of Gamma-Ray Binary PSR J2032+4127

Yu-Feng Luo, Shanshan Weng, Qing-Zhong Liu, M. Y. Ge et autres

Abstract PSR J2032+4127 is the only gamma-ray binary that exhibits pulsations in gamma rays. Previous research has indicated that the pulsar and the Be star MT91 213 orbit each other in a highly eccentric orbit with an extremely long period, with the …

Thermonuclear X-Ray Bursts of 4U 0614+09: The Evidence for the Retreat of the Disk away from the Neutron Star

Yupeng Chen, Long Ji, Shu Zhang, Shuang‐Nan Zhang et autres

Abstract The thermonuclear X-ray burster, 4U 0614+09, which is located at a distance of ∼3 kpc, serves as a valuable laboratory for studying the interaction between thermonuclear X-ray bursts and the surrounding accretion environment. By analyzing the archived data from NICER and …

Highly Polarized Intrinsic Emission and Its Orthogonal Counterpart in Vela X-1

Wai Ling Wu, Fei Xie, Long Ji, M. Y. Ge et autres

Abstract Vela X-1 is one of the most archetypal wind-fed X-ray pulsars (XRPs), and the emergence of its orthogonal polarization states reveals distinctive polarimetric properties. Using data from Imaging X-ray Polarimetry Explorer observations of Vela X-1, we perform a polarization analysis of …

Highly Polarized Intrinsic Emission and its Orthogonal Counterpart in Vela X-1

Wai Ling Wu, Fei Xie, Long Ji, M. Y. Ge et autres

Vela X-1 is one of the most archetypal wind-fed X-ray pulsars (XRPs), and the emergence of its orthogonal polarization states reveals distinctive polarimetric properties. Using data from Imaging X-ray Polarimetry Explorer (IXPE) observations of Vela X-1, we perform a polarization analysis of …

An Insight-HXMT View of the Evolution of the Type-C Quasiperiodic Oscillation during the Flaring State of Swift J1727.8–1613

Min Wei, Xiang Ma, Liang Zhang, X. H. Li et autres

Abstract We present a detailed analysis of the evolution of type-C quasiperiodic oscillations (QPOs) observed during the flaring state of the recently discovered black hole X-ray binary Swift J1727.8–1613, utilizing data from the Insight Hard X-ray Modulation Telescope. By examining the relation …

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Constraints on Emission Models by Broadband Observations of Soft Gamma-Ray Pulsar PSR B1509–58

W. T. Ye, Peng Zhang, M. Y. Ge, Liqiang Qi et autres

Abstract Soft γ -ray pulsars featuring broad single peaks exhibit different observational properties compared to ordinary double-peaked high-energy pulsars. These two types of pulsars are considered to be the result of different viewing angles. Therefore, the radiation characteristics of soft γ -ray …

A transition from mixed-fuel to pure-helium thermonuclear bursts in Terzan 5 X–3/Swift J174805.3–244637

Lei Zhang, Li Chen, Yuanyue Pan, Wenhui Yu et autres

We present a detailed analysis of seven thermonuclear X-ray bursts from Terzan 5 X–3/Swift J174805.3–244637 detected by NICER during the source’s 2023 outburst. Our analysis reveals a clear evolution of burst properties, identifying four non-photospheric radius expansion (non-PRE) bursts, one PRE candidate …

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