A fast radio burst with submillisecond quasi-periodic structure

被引：0

作者：

Pastor-Marazuela, Ines ^{[1
,2
,3
]}

van Leeuwen, Joeri ^{[2
]}

Bilous, Anna ^{[2
]}

Connor, Liam ^{[1
,4
]}

Maan, Yogesh ^{[2
,5
]}

Oostrum, Leon ^{[1
,2
,6
]}

Petroff, Emily ^{[1
,7
]}

Straal, Samayra ^{[8
,9
]}

Vohl, Dany ^{[1
,2
]}

Adams, Elizabeth A. K. ^{[2
,10
]}

Adebahr, Bjoern ^{[11
]}

Attema, Jisk ^{[6
]}

Boersma, Oliver M. ^{[1
,2
]}

van den Brink, R. ^{[2
]}

van Cappellen, W. A. ^{[2
]}

Coolen, Arthur H. W. M. ^{[2
]}

Damstra, Sieds ^{[2
]}

Denes, Helga ^{[2
]}

Hess, Kelley M. ^{[2
,10
,12
]}

van der Hulst, J. M. ^{[10
]}

Hut, Boudewijn ^{[2
]}

Kutkin, Alexander ^{[2
]}

Loose, G. Marcel ^{[2
]}

Lucero, Danielle M. ^{[13
]}

Mika, Agnes ^{[2
]}

Moss, Vanessa A. ^{[2
,14
,15
]}

Mulder, Henk ^{[2
]}

Norden, Menno J. ^{[2
]}

Oosterloo, Tom A. ^{[2
,10
]}

Rajwade, Kaustubh ^{[2
]}

van der Schuur, Daniel ^{[2
]}

Sclocco, Alessio ^{[6
]}

Smits, R. ^{[2
]}

Ziemke, Jacob ^{[2
,16
]}

机构：

[1] Univ Amsterdam, Anton Pannekoek Inst, Postbus 94249, NL-1090 GE Amsterdam, Netherlands

[2] Netherlands Inst Radio Astron, ASTRON, Oude Hoogeveensedijk 4, NL-7991 PD Dwingeloo, Netherlands

[3] Univ Manchester, Jodrell Bank Ctr Astrophys, Dept Phys & Astron, Manchester M13 9PL, England

[4] CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA USA

[5] Tata Inst Fundamental Res, Natl Ctr Radio Astrophys, Pune 411007, Maharashtra, India

[6] Netherlands eSci Ctr, Sci Pk 140, NL-1098 XG Amsterdam, Netherlands

[7] McGill Univ, Dept Phys, 3600 rue Univ, Montreal, PQ H3A 2T8, Canada

[8] NYU Abu Dhabi, POB 129188, Abu Dhabi, U Arab Emirates

[9] NYU Abu Dhabi, Ctr Astro Particle & Planetary Phys CAP3, POB 129188, Abu Dhabi, U Arab Emirates

[10] Kapteyn Astron Inst, POB 800, NL-9700 AV Groningen, Netherlands

[11] Astron Inst Ruhr Univ Bochum AIRUB, Univ Str 150, D-44780 Bochum, Germany

[12] Inst Astrofis Andalucia CSIC, Glorieta Astron S-N, Granada 18008, Spain

[13] Virginia Polytech Inst & State Univ, Dept Phys, 50 West Campus Dr, Blacksburg, VA 24061 USA

[14] CSIRO Astron & Space Sci, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia

[15] Univ Sydney, Sydney Inst Astron, Sch Phys, Sydney, NSW 2006, Australia

[16] Univ Oslo, Ctr Informat Technol, POB 1059, N-0316 Oslo, Norway

来源：

ASTRONOMY & ASTROPHYSICS | 2023年 / 678卷

基金：

美国国家航空航天局; 荷兰研究理事会; 欧洲研究理事会;

关键词：

stars: neutron; stars: magnetars;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Fast radio bursts (FRBs) are extragalactic radio transients of extraordinary luminosity. Studying the diverse temporal and spectral behaviour recently observed in a number of FRBs may help to determine the nature of the entire class. For example, a fast spinning or highly magnetised neutron star (NS) might generate the rotation-powered acceleration required to explain the bright emission. Periodic, subsecond components suggesting such rotation were recently reported in one FRB, and may also exist in two more. Here we report the discovery of FRB 20201020A with Apertif, an FRB that shows five components regularly spaced by 0.411 ms. This submillisecond structure in FRB 20201020A carries important clues about the progenitor of this FRB specifically, and potentially about the progenitors of FRBs in general. We therefore contrast its features to what is seen in other FRBs and pulsars, and to the predictions of some FRB models. We present a timing analysis of the FRB 20201020A components carried out in order to determine the significance of the periodicity. We compare these against the timing properties of the previously reported CHIME FRBs with subsecond quasi-periodic components, and against two Apertif bursts from repeating FRB 20180916B, which show complex time-frequency structure. We find the periodicity of FRB 20201020A to be marginally significant at 2.4 sigma. Its repeating subcomponents cannot be explained as pulsar rotation because the required spin rate of over 2 kHz exceeds the limits set by typical NS equations of state and observations. The fast periodicity is also in conflict with a compact object merger scenario. However, these quasi-periodic components could be caused by equidistant emitting regions in the magnetosphere of a magnetar. The submillisecond spacing of the components in FRB 20201020A, the smallest observed so far in a one-off FRB, may rule out both a NS spin period and binary mergers as the direct source of quasi-periodic FRB structure.

引用

页数：18

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