Diverse polarization angle swings from a repeating fast radio burst source

Luo, Rui; Wang, B. J.; Men, Yunpeng; Zhang, C. F.; Jiang, Jiancheng; Xu, Heng; Wang, W. Y.; Lee, K. J.; Han, J. L.; Zhang, B.; Caballero, R. N.; Chen, M. Z.; Chen, X. L.; Gan, Hengqian; Guo, Y.; Hao, Longfei; Huang, Yaohuan; Jiang, Peng; Li, H.; Li, J.; Li, Z. X.; Luo, Jun; Pan, Jiaoqing; Xin, Pei; Qian, Lei; Sun, Jinghai; Wang, Ming; Wang, N.; Wen, Z. G.; Xu, R. X.; Xu, Yang; Yan, Jun; Yan, W. M.; Yu, Dongjun; Yuan, Jianping; Zhang, S. B.; Zhu, Yan

doi:10.1038/s41586-020-2827-2

Cited by 169 publications

(174 citation statements)

References 55 publications

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“…The position angle in this model may be determined by both the field in the magnetar wind and by the magnetospheric field, depending on how the magnetic pulse propagates through the wind. This is compatible with the diverse polarization patterns observed in FRBs [79]. However, the model could not be applied to weak FRBs because, according to Equation (52), the emitted frequency becomes too low for small luminosities.…”

Section: Frbs From Magnetic Reconnection In the Upper Magnetar Magnetsupporting

confidence: 75%

“…However, this implies that in repeaters, the polarization position angle remains the same, namely along the rotation axis of the magnetar. This is incompatible with the diverse polarization angle swings observed in FRB 180301 [79]. As discussed in Section 2.5, the synchrotron radiation could not be fully polarized.…”

Section: Frbs Produced By Relativistic Shocks From Magnetar Flaresmentioning

confidence: 82%

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Emission Mechanisms of Fast Radio Bursts

Lyubarsky

2021

Universe

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Fast radio bursts (FRBs) are recently discovered mysterious single pulses of radio emission, mostly coming from cosmological distances (∼1 Gpc). Their short duration, ∼1 ms, and large luminosity demonstrate coherent emission. I review the basic physics of coherent emission mechanisms proposed for FRBs. In particular, I discuss the curvature emission of bunches, the synchrotron maser, and the emission of radio waves by variable currents during magnetic reconnection. Special attention is paid to magnetar flares as the most promising sources of FRBs. Non-linear effects are outlined that could place bounds on the power of the outgoing radiation.

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Section: Frbs From Magnetic Reconnection In the Upper Magnetar Magnetsupporting

confidence: 75%

Section: Frbs Produced By Relativistic Shocks From Magnetar Flaresmentioning

confidence: 82%

Emission Mechanisms of Fast Radio Bursts

Lyubarsky

2021

Universe

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“…Besides the theoretical study, new achievements of strangeon star study are of astrophysical implications, which could provide observational evidence for strangeon stars, including the positive P 2 − P 3 correlation of PSR B2016 + 28 with drifting subpulses (Lu et al 2019) and the magnetospheric origin of fast radio burst (Jiang et al 2020; Luo et al 2020; Wang et al 2018, 2019. 2020b), and even the glitch behavior (Lai et al 2018; Wang et al 2020a; Zhou et al 2014).…”

Section: The Way To Strange Starmentioning

confidence: 99%

A roadmap to strange star

Lai

Xia

2021

Astron Nachr

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What if normal baryonic matter is compressed so tightly that atomic nuclei come into close contact? This question has been asked since 1930s. The first answer was presented by Lev Landau whose speculation has been developed, and the concept of neutron star is then popularized. However, another answer is related to strange star, which becomes worthy of attention especially after the establishment of the standard model of particle physics in 1960s. The basic ideas of this study are introduced pedagogically. We must point out emphatically that flavor symmetry and strong coupling between quarks would be essential in seeking true answer to the question. The final answer is expected to appear in the era of multimessenger astronomy. It is emphasized too that, besides the differences of global properties (e.g., mass-radius relation, maximum mass, tidal deformability), the strong-bound surface of strange star (rather than the gravity-bound one for conventional neutron star) could play an important role in identifying a strange star by astronomical observations.

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“…Some are consistent with the so-called "rotation vector" model 62 . Swings of the PA across pulses are indeed observed in some FRBs, but may not follow the simplest rotating vector model 25,59 .…”

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confidence: 99%

The physical mechanisms of fast radio bursts

Zhang

2020

Nature

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286

189

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Fast radio bursts are mysterious millisecond-duration transients prevalent in the radio sky. Rapid accumulation of data in recent years has facilitated an understanding of the underlying physical mechanisms of these events. Knowledge gained from the neighboring fields of gamma-ray bursts and radio pulsars also offered insight. Here I review developments in this fast-moving field.Two generic categories of radiation model invoking either magnetospheres of compact objects (neutron stars or black holes) or relativistic shocks launched from such objects have been much debated. The recent detection of a Galactic fast radio burst in association with a soft gamma-ray repeater suggests that magnetar engines can produce at least some, and probably all, fast radio bursts. Other engines that could produce fast radio bursts are not required, but are also not impossible. On 24 July, 2001, a bright, dispersed radio pulse reached the Parkes 64-m telescope in Australia. The recorded signal remained unnoticed until Duncan Lorimer and his collaborators discovered it (now known as the fast radio burst FRB 010724) several years later and published the results in Science 1. For some time, some astronomers were not convinced that this so-called "Lorimer burst" was a genuine type of astrophysical event, until four more events were reported in 2013 (ref. 2). The field then enjoyed a rapid boost from both observational and theoretical fronts. With the identification of the microwave-oven-origin of some artificial bursts known as "perytons", the astrophysical origin of the bona fide bursts was finally established 3. This was followed by the detection of the first repeating source, known as FRB 121102 (ref. 4) and its localization in a dwarf star forming galaxy at redshift z = 0.19(refs. 5-7), establishing the extragalactic/cosmological origin (in contrast to the Galactic origin 8) of these events. Numerous theoretical models have been proposed to interpret these mysterious events 9. These have been driven by observations and groundbreaking results from numerous radio observatories: Parkes, Arecibo, Green Bank Telescope, the 1

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Diverse polarization angle swings from a repeating fast radio burst source

Cited by 169 publications

References 55 publications

Emission Mechanisms of Fast Radio Bursts

Emission Mechanisms of Fast Radio Bursts

A roadmap to strange star

The physical mechanisms of fast radio bursts

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