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The Northern Cross Fast Radio Burst project -- III. The FRB-magnetar connection in a sample of nearby galaxies by Pelliciari, Davide; Bernardi, Gianni; Pilia, Maura; Naldi, Giovanni; Pupillo, Giuseppe; Trudu, Matteo; Addis, Antonio; Bianchi, Germano; Bortolotti, Claudio; Dallacasa, Daniele; Lulli, Roberto; Maccaferri, Andrea; Magro, Alessio; Mattana, Andrea; Perini, Federico; Roma, Mauro; Schiaffino, Marco; Setti, Giancarlo; Tavani, Marco; Verrecchia, Francesco; Casentini, Claudio is a scholarly article available to read on EtoBox.

What is The Northern Cross Fast Radio Burst project -- III. The FRB-magnetar connection in a sample of nearby galaxies about?

Fast radio bursts (FRBs) are millisecond radio transients observed at cosmological distances. The nature of their progenitors is still a matter of debate, although magnetars are invoked by most models. The proposed FRB-magnetar connection was strengthened by the discovery of an FRB-like event from the Galactic magnetar SGR J1935+2154. In this work, we aim to investigate how prevalent magnetars such as SGR J1935+2154 are within FRB progenitors. We carried out an FRB search in a sample of seven nearby (< 12 Mpc) galaxies with the Northern Cross radio telescope for a total of 692 h. We detected one 1.8 ms burst in the direction of M101 with a fluence of $58 \pm 5$ Jy ms. Its dispersion measure of 303 pc cm$^{-3}$ places it most-likely beyond M101. Considering that no significant detection comes indisputably from the selected galaxies, we place a 38 yr$^{-1}$ upper limit on the total burst rate (i.e. including the whole sample) at the 95\% confidence level. This upper limit constrains the event rate per magnetar $\lambda_{\rm mag} < 0.42$ magnetar$^{-1}$ yr$^{-1}$ or, if combined with literature observations of a similar sample of nearby galaxies, it yields a joint constraint of $\lamb

Author

Pelliciari, Davide; Bernardi, Gianni; Pilia, Maura; Naldi, Giovanni; Pupillo, Giuseppe; Trudu, Matteo; Addis, Antonio; Bianchi, Germano; Bortolotti, Claudio; Dallacasa, Daniele; Lulli, Roberto; Maccaferri, Andrea; Magro, Alessio; Mattana, Andrea; Perini, Federico; Roma, Mauro; Schiaffino, Marco; Setti, Giancarlo; Tavani, Marco; Verrecchia, Francesco; Casentini, Claudio

Published

2023

Language

EN