Possible periodic activity in the repeating FRB 121102

被引：210

作者：

Rajwade, K. M. ^{[1
]}

Mickaliger, M. B. ^{[1
]}

Stappers, B. W. ^{[1
]}

Morello, V ^{[1
]}

Agarwal, D. ^{[2
,3
]}

Bassa, C. G. ^{[4
]}

Breton, R. P. ^{[1
]}

Caleb, M. ^{[1
]}

Karastergiou, A. ^{[5
,6
,7
]}

Keane, E. F. ^{[1
,8
]}

Lorimer, D. R. ^{[2
,3
]}

机构：

[1] Univ Manchester, Jodrell Bank Ctr Astrophys, Oxford Rd, Manchester M13 9PL, Lancs, England

[2] West Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA

[3] West Virginia Univ, Ctr Gravitat Waves & Cosmol, Morgantown, WV 26506 USA

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

[5] Univ Oxford, Astrophys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England

[6] Rhodes Univ, Dept Phys & Elect, POB 94, ZA-6140 Grahamstown, South Africa

[7] Univ Western Cape, Phys Dept, ZA-7535 Cape Town, South Africa

[8] SKA Org, Macclesfield SK11 9FT, Cheshire, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2020年 / 495卷 / 04期

基金：

美国国家科学基金会; 欧洲研究理事会;

关键词：

surveys; binaries: general; radio continuum: transients; FAST RADIO-BURST; GALAXY;

D O I：

10.1093/mnras/staa1237

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The discovery that at least some Fast Radio Bursts (FRBs) repeat has ruled out cataclysmic events as the progenitors of these particular bursts. FRB 121102 is the most well-studied repeating FRB but despite extensive monitoring of the source, no underlying pattern in the repetition has previously been identified. Here, we present the results from a radio monitoring campaign of FRB 121102 using the 76 m Lovell telescope. Using the pulses detected in the Lovell data along with pulses from the literature, we report a detection of periodic behaviour of the source over the span of 5 yr of data. We predict that the source is currently 'off' and that it should turn 'on' for the approximate MJD range 59002-59089 (2020 June 2 to 2020 August 28). This result, along with the recent detection of periodicity from another repeating FRB, highlights the need for long-term monitoring of repeating FRBs at a high cadence. Using simulations, we show that one needs at least 100 h of telescope time to follow-up repeating FRBs at a cadence of 0.5-3 d to detect periodicities in the range of 10-150 d. If the period is real, it shows that repeating FRBs can have a large range in their activity periods that might be difficult to reconcile with neutron star precession models.

引用

页码：3551 / 3558

页数：8

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