Constraints on the engines of fast radio bursts
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TLDR
In this article, the authors model the sample of fast radio bursts (FRB), including the newly discovered CHIME repeaters, using the synchrotron blast wave model of Metzger, Margalit & Sironi.Abstract:
We model the sample of fast radio bursts (FRB), including the newly discovered CHIME repeaters, using the synchrotron blast wave model of Metzger, Margalit & Sironi (2019). This model postulates that FRBs are precursor radiation from ultra-relativistic magnetized shocks generated as flare ejecta from a central engine collide with an effectively stationary external medium. Downward drifting of the burst frequency structure naturally arises from deceleration of the blast-wave. The data are consistent with FRBs being produced by flares of energy $E_{\rm flare} \sim 10^{43}-10^{46}(f_{\xi}/10^{-3})^{-4/5}$ erg, where $f_{\xi}$ is the maser efficiency, and minimum bulk Lorentz factors $\Gamma \approx 10^2-10^3$, which generate the observed FRBs at shock radii $r_{\rm sh} \sim 10^{12}-10^{13}$ cm. We infer upstream densities $n_{\rm ext}(r_{\rm sh}) \sim 10^{2}-10^{4}$ cm$^{-3}$ and radial profiles $n_{\rm ext} \propto r^{-k}$ showing a range of slopes $k \approx [-2,1]$ (which are seen to evolve between bursts), broadly consistent with the upstream medium being the inner edge of an ion-loaded shell released by a recent energetic flare. The burst timescales, energetics, rates, and external medium properties are consistent with repeating FRBs arising from young, hyper-active flaring magnetars, but the methodology presented is generally applicable to any central engine which injects energy impulsively into a dense magnetized medium. Uncertainties and variations of the model are discussed, including the effects of the strong electric field of the FRB wave (strength parameter $a \gg 1$) on the upstream medium. One-dimensional particle-in-cell simulations of magnetized shocks into a pair plasma are presented which demonstrate that high maser efficiency can be preserved, even in the limit $a \gg 1$ in which the FRB wave accelerates the upstream electrons to ultra-relativistic speeds.read more
Citations
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Journal ArticleDOI
INTEGRAL Discovery of a Burst with Associated Radio Emission from the Magnetar SGR 1935+2154
Sandro Mereghetti,V. G. Savchenko,Carlo Ferrigno,Diego Götz,Michela Rigoselli,Andrea Tiengo,Angela Bazzano,Enrico Bozzo,Alexis Coleiro,Thierry J.-L. Courvoisier,Maeve Doyle,Andrea Goldwurm,Lorraine Hanlon,Elisabeth Jourdain,Elisabeth Jourdain,A. von Kienlin,Alexander A. Lutovinov,Antonio Martin-Carrillo,Sergey V. Molkov,Lorenzo Natalucci,Francesca Onori,Francesca Panessa,James Rodi,J. Rodriguez,C. Sanchez-Fernandez,Rashid Sunyaev,Rashid Sunyaev,Pietro Ubertini +27 more
TL;DR: In this article, the authors reported on the INTEGRAL observations of the soft gamma-ray repeater SGR 1935+2154 performed between 2020 April 28 and May 3.
Journal ArticleDOI
A unified picture of Galactic and cosmological fast radio bursts
Wenbin Lu,Pawan Kumar,Bing Zhang +2 more
TL;DR: In this paper, it was shown that the volumetric rate of fast radio burst (FRB) like events is consistent with the faint end of the cosmological FRB rate, and hence they most likely belong to the same class of transients.
Journal ArticleDOI
Implications of a Fast Radio Burst from a Galactic Magnetar
TL;DR: In this paper, the authors show that the properties of the coincident radio and X-ray flares from SGR 1935+2154, including their approximate simultaneity and relative fluence, as well as the duration and spectrum of the Xray emission, are consistent with existing predictions for the synchrotron maser shock model.
Journal ArticleDOI
High time resolution and polarization properties of ASKAP-localized fast radio bursts
Cherie K. Day,Cherie K. Day,Adam Deller,Ryan Shannon,Hao Qiu,Hao Qiu,Keith W. Bannister,Shivani Bhandari,Ron Ekers,Ron Ekers,Chris Flynn,C. W. James,Jean-Pierre Macquart,Elizabeth K. Mahony,Chris Phillips,J. Xavier Prochaska,J. Xavier Prochaska +16 more
Abstract: Combining high time and frequency resolution full-polarization spectra of fast radio bursts (FRBs) with knowledge of their host galaxy properties provides an opportunity to study both the emission mechanism generating them and the impact of their propagation through their local environment, host galaxy, and the intergalactic medium. The Australian Square Kilometre Array Pathfinder (ASKAP) telescope has provided the first ensemble of bursts with this information. In this paper, we present the high time and spectral resolution, full polarization observations of five localized FRBs to complement the results published for the previously studied ASKAP FRB 181112. We find that every FRB is highly polarized, with polarization fractions ranging from 80 to 100 per cent, and that they are generally dominated by linear polarization. While some FRBs in our sample exhibit properties associated with an emerging archetype (i.e. repeating or apparently non-repeating), others exhibit characteristic features of both, implying the existence of a continuum of FRB properties. When examined at high time resolution, we find that all FRBs in our sample have evidence for multiple subcomponents and for scattering at a level greater than expected from the Milky Way. We find no correlation between the diverse range of FRB properties (e.g. scattering time, intrinsic width, and rotation measure) and any global property of their host galaxy. The most heavily scattered bursts reside in the outskirts of their host galaxies, suggesting that the source-local environment rather than the host interstellar medium is likely the dominant origin of the scattering in our sample.
Journal ArticleDOI
Fast radio bursts from reconnection in magnetar magnetosphere.
TL;DR: In this paper, it was shown that the totally polarized radiation could be generated in the course of relativistic magnetic reconnection in the outer magnetosphere of the magnetar, which places severe limits on the emission mechanism.
References
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Journal ArticleDOI
A Bright Millisecond Radio Burst of Extragalactic Origin
TL;DR: A 30-jansky dispersed burst, less than 5 milliseconds in duration, located 3° from the Small Magellanic Cloud is found, which implies that it was a singular event such as a supernova or coalescence of relativistic objects.
Journal ArticleDOI
Fluid dynamics of relativistic blast waves
TL;DR: In this paper, a fluid dynamical treatment of an ultra-relativistic spherical blast wave enclosed by a strong shock is presented, and a simple similarity solution describing the explosion of a fixed amount of energy in a uniform medium is derived, and generalized to include cases in which power is supplied by a central source and the density of the external medium varies with radius.
Journal ArticleDOI
A population of fast radio bursts at cosmological distances.
David J. Thornton,David J. Thornton,Ben Stappers,Matthew Bailes,Matthew Bailes,Benjamin R. Barsdell,Benjamin R. Barsdell,Samuel Bates,N. D. R. Bhat,N. D. R. Bhat,N. D. R. Bhat,M. Burgay,Sarah Burke-Spolaor,D. J. Champion,P. Coster,P. Coster,N. D'Amico,Andrew Jameson,Andrew Jameson,Simon Johnston,Michael Keith,Michael Kramer,Michael Kramer,Lina Levin,S. Milia,Cherry Ng,A. Possenti,W. van Straten,W. van Straten +28 more
TL;DR: The detection of four nonrepeating radio transient events with millisecond duration in data from the 64-meter Parkes radio telescope in Australia indicates that these radio bursts had their origin outside the authors' galaxy, but it is not possible to tell what caused them.
Journal ArticleDOI
A repeating fast radio burst
Laura Spitler,Paul Scholz,Jason W. T. Hessels,Jason W. T. Hessels,Slavko Bogdanov,Adam Brazier,Fernando Camilo,Shami Chatterjee,J. M. Cordes,Fronefield Crawford,Julia Deneva,Robert D. Ferdman,Paulo C. C. Freire,Victoria M. Kaspi,P. Lazarus,R. S. Lynch,R. S. Lynch,E. Madsen,Maura McLaughlin,C. Patel,Scott M. Ransom,Andrew Seymour,Ingrid H. Stairs,Ingrid H. Stairs,Ben Stappers,J. van Leeuwen,J. van Leeuwen,Weiwei Zhu +27 more
TL;DR: These repeat bursts with high dispersion measure and variable spectra specifically seen from the direction of FRB 121102 support an origin in a young, highly magnetized, extragalactic neutron star.
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