Quasi-periodic Oscillations of the X-Ray Burst from the Magnetar SGR J1935–2154 and Associated with the Fast Radio Burst FRB 200428

Li, Xiaobo; Ge, Ming-Yu; Lin, Lin; Zhang, Shuang‐Nan; Song, Liming; Cao, Xuelei; Zhang, Bing; Xu, Yupeng; Xiong, S. L.; Tuo, You-Li; Tan, Ying; Jiang, Weichun; Qu, J. L.; Zhang, Shu; Wang, Lingjun; Wang, Jie-Shuang; Zhang, Binbin; Zhang, Peng; Li, Cheng-Kui; Liu, Cong‐Zhan; Li, Ti-Pei; Bu, Q. C.; Cai, C.; Chen, Yong; Chen, Yupeng; Chang, Zhi; Chen, Li; Chen, Tianxian; Chen, Yibao; Cui, Weiwei; Du, Yifeng; Gao, G. H.; Gu, Y. D.; Guan, J.; Guo, Chengcheng; Han, Danxiang; Huang, Y.; Jia, Haiqiang; Jia, S. M.; Jin, Jing; Kong, L. D.; Li, Bing; Li, Gang; Li, Wei; Li, Xian; Li, Xufang; Liang, X. H.; Liao, J. Y.; Liu, Hexin; Liu, Hongwei; Liu, Xiaojing; Lu, X. F.; Luo, Q.; Luo, T.; Binyuan, Ma,; Ma, Ruican; Ma, Xiang; Meng, Bin; Nang, Y.; Nie, J. Y.; Ou, G.; Ren, Xiaokang; Sai, N.; Song, X. Y.; Sun, Liang; Tao, Lian; Wang, Chen; Wang, Pengju; Wang, Wenshuai; Wang, Yusa; Wen, Xiang-Yang; Wu, B. Y.; Wu, B. B.; Wu, Mei‐Hwan; Xiao, Shuo; Yang, S.; Yang, Young Chul; Yi, Q. B.; Yin, Q. Q.; You, Y.; Yu, Wei; Zhang, Fan; Zhang, Hongmei; Zhang, Juan; Zhang, Wanchang; Zhang, Wei; Zhang, Yifei; Zhang, Yuanhang; Zhao, H. S.; Zhao, Xiaofan; Zheng, S.; Zhou, D. J.

doi:10.3847/1538-4357/ac6587

Cited by 28 publications

(13 citation statements)

References 55 publications

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“…For more energetic transient radio emission, i.e., FRBs, charge starvation at low altitudes near polar caps is also salient. Recently, Li et al (2022) reported a ∼ 35-40 Hz quasi-periodic oscillation in the X-ray burst (FRB-X) associated with the FRB-like radio bursts in SGR 1935+2154; this period matches well the temporal separation of the two radio burst peaks. Such a frequency is compatible with crustal torsional eigenmodes of neutron stars, conforming to predictions of "low-twist" magnetar FRB models of Wadiasingh & Timokhin (2019) and Wadiasingh et al (2020) that invoke crustal disturbances.…”

Section: Magnetar Radio Emission Connectionssupporting

confidence: 54%

High-energy Photon Opacity in the Twisted Magnetospheres of Magnetars

Baring

Harding

et al. 2022

ApJ

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Magnetars are neutron stars characterized by strong surface magnetic fields generally exceeding the quantum critical value of 44.1 TG. High-energy photons propagating in their magnetospheres can be attenuated by QED processes like photon splitting and magnetic pair creation. In this paper, we compute the opacities due to photon splitting and pair creation by photons emitted anywhere in the magnetosphere of a magnetar. Axisymmetric, twisted dipole field configurations embedded in the Schwarzschild metric are treated. The paper computes the maximum energies for photon transparency that permit propagation to infinity in curved spacetime. Special emphasis is given to cases where photons are generated along magnetic field loops and/or in polar regions; these cases directly relate to resonant inverse Compton scattering models for the hard X-ray emission from magnetars and Comptonized soft gamma-ray emission from giant flares. We find that increases in magnetospheric twists raise or lower photon opacities, depending on both the emission locale and the competition between field-line straightening and field strength enhancement. Consequently, given the implicit spectral transparency of hard X-ray bursts and persistent “tail” emission of magnetars, photon splitting considerations constrain their emission region locales and the twist angle of the magnetosphere; these constraints can be probed by future soft gamma-ray telescopes such as COSI and AMEGO. The inclusion of twists generally increases the opaque volume of pair creation by photons above its threshold, except when photons are emitted in polar regions and approximately parallel to the field.

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Section: Magnetar Radio Emission Connectionssupporting

confidence: 54%

High-energy Photon Opacity in the Twisted Magnetospheres of Magnetars

Baring

Harding

et al. 2022

ApJ

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“…Their results have the potential to guide X-ray telescopes, i.e., Insight-HXMT (Hard X-ray Modulation Telescope) [82] and the next generation X-ray time-domain Telescope Einstein Probe [83], to find more targeted observation sources and to take more accurate measurements. Furthermore, since X-ray binaries are also the origin of high-energy jets that are highly collimated [84], fundamental frequencies of the X-ray QPOs and the relativistic precession of jets may be associated. Accurate measurements of jets' physical properties with SKA's superior sensitivity and angular resolution can therefore provide strong synergy for future QPOs observations.…”

Section: Discussionmentioning

confidence: 99%

Constraints on the rotating self-dual black hole with quasi-periodic oscillations

Liu,

Siew,

Zhu

et al. 2023

J. Cosmol. Astropart. Phys.

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An impressive feature of loop quantum gravity (LQG) is that it can elegantly resolve both the big bang and black hole singularities. By using the Newman-Janis algorithm, a regular and effective rotating self-dual black hole (SDBH) metric could be constructed, which alters the Kerr geometry with a polymeric function P from the quantum effects of LQG geometry. In this paper, we investigate its impact on the frequency characteristics of the X-ray quasi-periodic oscillations (QPOs) from 5 X-ray binaries and contrast it with the existing results of the orbital, periastron precession and nodal precession frequencies within the relativistic precession model. We apply a Monte Carlo Markov Chain (MCMC) simulation to examine the possible LQG effects on the X-ray QPOs. We found that the best constraint result for the rotating self-dual geometry from LQG came from the QPOs of X-ray binary GRO J1655-40, which establish an upper bound on the polymeric function P less than 6.15 × 10-3 at 95% confidence level. This bound leads to a restriction on the polymeric parameter δ of LQG to be 0.66.

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“…A QPO centered at ∼57 Hz was also found by stacking 30 short, individual bursts from SGR 1806−20 (Huppenkothen et al 2014b). More recently, a 40 Hz QPO at 3.4σ (p-value of 2.9 × 10 −4 ) was reported from SGR J1935 in data from the Hard X-ray Modulation Telescope (an instrument on Insight) over an energy interval of 18-50 keV (Li et al 2022). This unusual burst was observed contemporaneously with FRB 200428 during the 2020 outburst, suggesting that some FRBs are related to strong oscillation processes in neutron stars.…”

Section: Qpos In Magnetar Burstsmentioning

confidence: 97%

Quasiperiodic Peak Energy Oscillations in X-Ray Bursts from SGR J1935+2154

Roberts,

Baring,

Huppenkothen

et al. 2023

ApJL

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Magnetars are young neutron stars powered by the strongest magnetic fields in the Universe (1013–15 G). Their transient X-ray emission usually manifests as short (a few hundred milliseconds), bright, energetic (∼1040–41 erg) X-ray bursts. Since its discovery in 2014, SGR J1935+2154 has become one of the most prolific magnetars, exhibiting very active bursting episodes and other fascinating events, such as pulse timing antiglitches and fast radio bursts. Here we present evidence for possible 42 Hz (24 ms) quasiperiodic oscillations in the ν F ν spectrum peak energy (E p ) identified in a unique burst detected with the Fermi Gamma-ray Burst Monitor in 2022 January. While quasiperiodic oscillations have been previously reported in the intensity of magnetar burst light curves, quasiperiodic oscillations in E p have not. We also find an additional event from the same outburst that appears to exhibit a similar character in E p , albeit of lower statistical quality. For these two exceptional transients, such E p oscillations can be explained by magnetospheric density and pressure perturbations. For burst-emitting plasma consisting purely of e + e − pairs, these acoustic modes propagate along a highly magnetized flux tube of length up to around L ∼ 130 neutron star radii, with L being lower if ions are present in the emission zone. Detailed time-resolved analyses of other magnetar bursts are encouraged to evaluate the rarity of these events and their underlying mechanisms.

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Quasi-periodic Oscillations of the X-Ray Burst from the Magnetar SGR J1935–2154 and Associated with the Fast Radio Burst FRB 200428

Cited by 28 publications

References 55 publications

High-energy Photon Opacity in the Twisted Magnetospheres of Magnetars

High-energy Photon Opacity in the Twisted Magnetospheres of Magnetars

Constraints on the rotating self-dual black hole with quasi-periodic oscillations

Quasiperiodic Peak Energy Oscillations in X-Ray Bursts from SGR J1935+2154

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