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A second source of repeating fast radio bursts

Amiri, M ; Bandura, K ; Bhardwaj, M ; Boubel, P ; Boyce, M M ; Boyle, P J ; Brar, C ; Burhanpurkar, M ; Cassanelli, T ; Chawla, P ; Cliche, J F ; Cubranic, D ; Deng, M ; Denman, N ; Dobbs, M ; Fandino, M ; Fonseca, E ; Gaensler, B M ; Gilbert, A J ; Gill, A ; Giri, U ; Good, D C ; Halpern, M ; Hanna, D S ; Hill, A S ; Hinshaw, G ; Höfer, C ; Josephy, A ; Kaspi, V M ; Landecker, T L ; Lang, D A ; Lin, H-H ; Masui, K W ; Mckinven, R ; Mena-Parra, J ; Merryfield, M ; Michilli, D ; Milutinovic, N ; Moatti, C ; Naidu, A ; Newburgh, L B ; Ng, C ; Patel, C ; Pen, U ; Pinsonneault-Marotte, T ; Pleunis, Z ; Rafiei-Ravandi, M ; Rahman, M ; Ransom, S M ; Renard, A ; Scholz, P ; Shaw, J R ; Siegel, S R ; Smith, K M ; Stairs, I H ; Tendulkar, S P ; Tretyakov, I ; Vanderlinde, K ; Yadav, P

Nature (London), 2019-02, Vol.566 (7743), p.235-238 [Periódico revisado por pares]

England: Nature Publishing Group

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Título:
A second source of repeating fast radio bursts
Autor: Amiri, M ; Bandura, K ; Bhardwaj, M ; Boubel, P ; Boyce, M M ; Boyle, P J ; Brar, C ; Burhanpurkar, M ; Cassanelli, T ; Chawla, P ; Cliche, J F ; Cubranic, D ; Deng, M ; Denman, N ; Dobbs, M ; Fandino, M ; Fonseca, E ; Gaensler, B M ; Gilbert, A J ; Gill, A ; Giri, U ; Good, D C ; Halpern, M ; Hanna, D S ; Hill, A S ; Hinshaw, G ; Höfer, C ; Josephy, A ; Kaspi, V M ; Landecker, T L ; Lang, D A ; Lin, H-H ; Masui, K W ; Mckinven, R ; Mena-Parra, J ; Merryfield, M ; Michilli, D ; Milutinovic, N ; Moatti, C ; Naidu, A ; Newburgh, L B ; Ng, C ; Patel, C ; Pen, U ; Pinsonneault-Marotte, T ; Pleunis, Z ; Rafiei-Ravandi, M ; Rahman, M ; Ransom, S M ; Renard, A ; Scholz, P ; Shaw, J R ; Siegel, S R ; Smith, K M ; Stairs, I H ; Tendulkar, S P ; Tretyakov, I ; Vanderlinde, K ; Yadav, P
Assuntos: Astrophysics ; Automation ; Collaboration ; Free electrons ; Gamma rays ; Hydrogen ; Mapping ; Milky Way ; Position measurement ; Properties ; Radio bursts ; Radio telescopes ; Radio waves ; Red shift ; Repeaters ; Telecommunications equipment ; Telescopes
É parte de: Nature (London), 2019-02, Vol.566 (7743), p.235-238
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: The discovery of a repeating fast radio burst (FRB) source , FRB 121102, eliminated models involving cataclysmic events for this source. No other repeating FRB has hitherto been detected despite many recent discoveries and follow-ups , suggesting that repeaters may be rare in the FRB population. Here we report the detection of six repeat bursts from FRB 180814.J0422+73, one of the 13 FRBs detected by the Canadian Hydrogen Intensity Mapping Experiment (CHIME) FRB project during its pre-commissioning phase in July and August 2018. These repeat bursts are consistent with originating from a single position on the sky, with the same dispersion measure, about 189 pc cm . This traces approximately twice the expected Milky Way column density, and implies an upper limit on the source redshift of 0.1, at least a factor of about 2 closer than FRB 121102 . In some of the repeat bursts, we observe sub-pulse frequency structure, drifting, and spectral variation reminiscent of that seen in FRB 121102 , suggesting similar emission mechanisms and/or propagation effects. This second repeater, found among the first few CHIME/FRB discoveries, suggests that there exists-and that CHIME/FRB and other wide-field, sensitive radio telescopes will find-a substantial population of repeating FRBs.
Editor: England: Nature Publishing Group
Idioma: Inglês

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A second source of repeating fast radio bursts

England: Nature Publishing Group

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