Details

Autor(en) / Beteiligte

• James, C. W.
• Os owski, S.
• Flynn, C.
• Kumar, P.
• Bannister, K.
• Bhandari, S.
• Farah, W.
• Kerr, M.
• Lorimer, D. R.
• Macquart, J.-P.
• Ng, C.
• Phillips, C.
• Price, D. C.
• Qiu, H.
• Shannon, R. M.
• Spiewak, R.

Titel

Measurement of the Rate Distribution of the Population of Repeating Fast Radio Bursts: Implications for Progenitor Models

Ist Teil von

• Astrophysical journal. Letters, 2020-05, Vol.895 (1), p.L22

Ort / Verlag

Austin: The American Astronomical Society

Erscheinungsjahr

2020

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The discovery of many repeating fast radio bursts (FRBs) by the Canadian Hydrogen Intensity Mapping Experiment, the high rate of individual bursts, and the observation of repeat bursts from a bright FRB initially detected by the Australian Square Kilometre Array Pathfinder (ASKAP) suggest a significant population of repeating FRBs. Here, we analyze the rate distribution of this population using results from follow-up observations of the Commensal Real-time ASKAP Fast Transients Survey. Characterizing a repeating FRB by its burst rate R0 above an energy of 1038 erg, we consider a volumetric density Φ(R0) with rate distribution . We use maximum-likelihood methods to constrain ζ < −1.94 at 90% confidence. We discuss how this constraint can be used to limit different classes of progenitor models for repeating FRBs: it excludes FRBs with burst rate proportional to neutron star spin-down power with braking index n ≤ 14, i.e., magnetic dipole radiation (n = 3); and it excludes some scenarios for FRB emission from magnetars, and the magnetic field interactions of compact binaries.