A burst storm from the repeating FRB 20200120E in an M81 globular cluster
Artikel i vetenskaplig tidskrift, 2023
The repeating fast radio burst (FRB) source FRB 20200120E is exceptional because of its proximity and association with a globular cluster. Here we report 60 bursts detected with the Effelsberg telescope at 1.4 GHz. We observe large variations in the burst rate, and report the first FRB 20200120E 'burst storm', where the source suddenly became active and 53 bursts (fluence ≥0.04 Jy ms) occurred within only 40 min. We find no strict periodicity in the burst arrival times, nor any evidence for periodicity in the source's activity between observations. The burst storm shows a steep energy distribution (power-law index α = 2.39 ± 0.12) and a bimodal wait-time distribution, with log-normal means of 0.94+0.07−0.06 s and 23.61+3.06−2.71 s. We attribute these wait-time distribution peaks to a characteristic event time-scale and pseudo-Poisson burst rate, respectively. The secondary wait-time peak at ∼1 s is ∼50 × longer than the ∼24 ms time-scale seen for both FRB 20121102A and FRB 20201124A - potentially indicating a larger emission region, or slower burst propagation. FRB 20200120E shows order-of-magnitude lower burst durations and luminosities compared with FRB 20121102A and FRB 20201124A. Lastly, in contrast to FRB 20121102A, which has observed dispersion measure (DM) variations of ΔDM > 1 pc cm−3 on month-to-year time-scales, we determine that FRB 20200120E's DM has remained stable (ΔDM < 0.15 pc cm−3) over >10 months. Overall, the observational characteristics of FRB 20200120E deviate quantitatively from other active repeaters, but it is unclear whether it is qualitatively a different type of source.
fast radio bursts
radio continuum: transients
Författare
K. Nimmo
Netherlands Institute for Radio Astronomy (ASTRON)
Anton Pannekoek Institute for Astronomy
J. W. T. Hessels
Netherlands Institute for Radio Astronomy (ASTRON)
Anton Pannekoek Institute for Astronomy
M. P. Snelders
Netherlands Institute for Radio Astronomy (ASTRON)
Anton Pannekoek Institute for Astronomy
R. Karuppusamy
Max-Planck-Gesellschaft
D. M. Hewitt
Anton Pannekoek Institute for Astronomy
Franz Kirsten
Netherlands Institute for Radio Astronomy (ASTRON)
Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium
B. Marcote
Joint Institute for VLBI in Europe (JIVE)
U. Bach
Max-Planck-Gesellschaft
A. Bansod
Max-Planck-Gesellschaft
E. D. Barr
Max-Planck-Gesellschaft
J. Behrend
Max-Planck-Gesellschaft
V. Bezrukovs
Ventspils Augstskola
S. Buttaccio
Istituto nazionale di astrofisica (INAF)
R. Feiler
Uniwersytet Mikolaja Kopernika
M. P.Gawron Ski
Uniwersytet Mikolaja Kopernika
Michael Lindqvist
Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium
A. Orbidans
Ventspils Augstskola
W. Puchalska
Uniwersytet Mikolaja Kopernika
N. Wang
Xinjiang Astronomical Observatory
T. Winchen
Max-Planck-Gesellschaft
P. Wolak
Uniwersytet Mikolaja Kopernika
J. Wu
Max-Planck-Gesellschaft
J. P. Yuan
Xinjiang Astronomical Observatory
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 520 2 2281-2305Opticon RadioNet Pilot
Europeiska kommissionen (EU) (EC/H2020/101004719), 2021-03-01 -- 2025-02-28.
Ämneskategorier
Meteorologi och atmosfärforskning
Astronomi, astrofysik och kosmologi
DOI
10.1093/mnras/stad269