A probe of the maximum energetics of fast radio bursts through a prolific repeating source
| Autor: | Ould-Boukattine, O. S., Chawla, P., Hessels, J. W. T., Cooper, A. J., Gawroński, M. P., Herrmann, W., Kirsten, F., Hewitt, D. M., Konijn, D. C., Nimmo, K., Pleunis, Z., Puchalska, W., Snelders, M. P. |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Fast radio bursts (FRBs) are sufficiently energetic to be detectable from luminosity distances up to at least seven billion parsecs (redshift $z > 1$). Probing the maximum energies and luminosities of FRBs constrains their emission mechanism and cosmological population. Here we investigate the maximum energetics of a highly active repeater, FRB 20220912A, using 1,500h of observations. We detect $130$ high-energy bursts and find a break in the burst energy distribution, with a flattening of the power-law slope at higher energy. This is consistent with the behaviour of another highly active repeater, FRB 20201124A. Furthermore, we model the rate of the highest-energy bursts and find a turnover at a characteristic spectral energy density of $E^{\textrm{char}}_{\nu} = 2.09^{+3.78}_{-1.04}\times10^{32}$ erg/Hz. This characteristic maximum energy agrees well with observations of apparently one-off FRBs, suggesting a common physical mechanism for their emission. The extreme burst energies push radiation and source models to their limit. Comment: Comments welcome |
| Databáze: | arXiv |
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