FRB Periodicity: Mild Pulsars in Tight O/B-star Binaries

Lyutikov, Maxim; Barkov, Maxim V.; Giannios, Dimitrios

doi:10.3847/2041-8213/ab87a4

Cited by 124 publications

(95 citation statements)

References 49 publications

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“…The recurrent FRB 180916 was recently shown by the CHIME/ FRB collaboration to exhibit a 16 day period of unknown origin (CHIME/FRB Collaboration et al 2020a). Again, although known Galactic magnetars offer no clear explanation for periodic behavior at this scale (with the possible exception of candidate magnetar 1E 1613485055, which has a measured period of 6.7 hr; de Luca et al 2006), reasonable variations in the properties of extragalactic magnetars (e.g., extremely slow rotation, precession, or presence in a binary) offer a potential explanation (Beniamini et al 2020;Levin et al 2020;Lyutikov et al 2020;Tong et al 2020;Yang & Zou 2020;Zanazzi & Lai 2020). Furthermore, a few FRBs have been localized to host galaxies with low levels of star formation (Bannister et al 2019;Ravi 2019) uncharacteristic of the environments of magnetars in the Milky Way as being the product of relatively typical CCSNe, although more recent localizations show that the population as a whole remains broadly consistent with CCSN host galaxies (Bhandari et al 2020).…”

Section: Introductionmentioning

confidence: 96%

Implications of a Fast Radio Burst from a Galactic Magnetar

Margalit

Beniamini

Sridhar

et al. 2020

ApJL

155

123

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A luminous radio burst was recently detected in temporal coincidence with a hard X-ray flare from the Galactic magnetar SGR 1935+2154with a time and frequency structure consistent with cosmological fast radio bursts (FRBs) and a fluence within a factor of 10 of the least energetic extragalactic FRB previously detected. Although active magnetars are commonly invoked FRB sources, several distinct mechanisms have been proposed for generating the radio emission that make different predictions for the accompanying higher-frequency radiation. We show that the properties of the coincident radio and X-ray flares from SGR 1935+2154, including their approximate simultaneity and relative fluence~-E E 10 radio X 5 , as well as the duration and spectrum of the X-ray emission, are consistent with extant predictions for the synchrotron maser shock model. Rather than arising from the inner magnetosphere, the X-rays are generated by (incoherent) synchrotron radiation from thermal electrons heated at the same internal shocks that produce the coherent maser emission as ultrarelativistic flare ejecta collides with a slower particle outflow (e.g., as generated by earlier flaring activity) on a radial scale of~10 11 cm. Although the rate of SGR 1935+2154-like bursts in the local universe is not sufficient to contribute appreciably to the extragalactic FRB rate, the inclusion of an additional population of more active magnetars with stronger magnetic fields than the Galactic population can explain both the FRB rate and the repeating fraction, but only if the population of active magnetars are born at a rate that is at least 2 orders of magnitude lower than that of the SGR 1935+2154-like magnetars. This may imply that the more active magnetar sources are not younger magnetars formed in a similar way to the Milky Way population (e.g., via ordinary supernovae) but are instead formed through more exotic channels, such as superluminous supernovae, accretion-induced collapse, or neutron star mergers.

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Section: Introductionmentioning

confidence: 96%

Implications of a Fast Radio Burst from a Galactic Magnetar

Margalit

Beniamini

Sridhar

et al. 2020

ApJL

155

123

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“…Bursts detected at 400-800 MHz occur within a 5 day window that repeats every 16.3 days (CHIME/FRB Collaboration et al 2020a). Multiple models have been proposed to explain the periodicity: the orbital motion of the FRB source (neutron star or magnetar) around a companion (Dai et al 2016;Ioka & Zhang 2020;Lyutikov et al 2020), precession of the burst emitting object itself (e.g., Levin et al 2020;Yang & Zou 2020;Zanazzi & Lai 2020), or ultralong rotational periods of the bursting object (Beniamini et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Emission Properties of Periodic Fast Radio Bursts from the Motion of Magnetars: Testing Dynamical Models

Zanazzi

2021

ApJL

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Recent observations of the periodic fast radio burst source 180916.J0158+65 (FRB 180916) find small linear polarization position angle swings during and between bursts, with a burst activity window that becomes both narrower and earlier at higher frequencies. Although the observed chromatic activity window disfavors models of periodicity in FRB 180916 driven solely by the occultation of a neutron star by the optically thick wind from a stellar companion, the connection to theories where periodicity arises from the motion of a bursting magnetar remains unclear. In this Letter, we show how altitude-dependent radio emission from a magnetar, with bursts emitted from regions that are asymmetric with respect to the magnetic dipole axis, can lead to burst activity windows and polarization consistent with the recent observations. In particular, the fact that bursts arrive systematically earlier at higher frequencies disfavors theories where the FRB periodicity arises from forced precession of a magnetar by a companion or fallback disk, but is consistent with theories where periodicity originates from a slowly rotating or freely precessing magnetar. Several observational tests are proposed to verify/ differentiate between the remaining theories, and pin down which theory explains the periodicity in FRB 180916.

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“…33 ). Such a longterm periodicity can be accommodated within the framework of binary [34][35][36] or precession [37][38][39] models.…”

mentioning

confidence: 99%

The physical mechanisms of fast radio bursts

Zhang

2020

Nature

274

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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FRB Periodicity: Mild Pulsars in Tight O/B-star Binaries

Cited by 124 publications

References 49 publications

Implications of a Fast Radio Burst from a Galactic Magnetar

Implications of a Fast Radio Burst from a Galactic Magnetar

Emission Properties of Periodic Fast Radio Bursts from the Motion of Magnetars: Testing Dynamical Models

The physical mechanisms of fast radio bursts

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