Conveners
Fast radio bursts: Thursday block 1
- Paolo Esposito (University School for Advanced Studies IUSS Pavia)
- Maura Pilia (INAF - Osservatorio Astronomico di Cagliari)
Fast radio bursts: Thursday block 2
- Maura Pilia (INAF - Osservatorio Astronomico di Cagliari)
- Paolo Esposito (University School for Advanced Studies IUSS Pavia)
Description
Fast Radio Bursts (FRBs) are short-duration (~ms) high-fluence (~Jy) radio-only events of extragalactic origin, some of which have been observed to repeat on various timescales. FRB durations define a characteristic length scale for their engine that points towards a compact object as a progenitor. The combination of high luminosity and short variability timescale of FRBs leads to extremely high brightness temperatures (of order 1036 K) which demands for a coherent emission process. The detection of 20200428, an FRB-like event produced by the Galactic magnetar SGR J1935+2154 strengthened the connection between FRBs and magnetars and it showed an X-ray counterpart to the radio emission in the form of a simultaneous burst.
This parallel session welcomes contributions on the many open questions regarding FRBs such as their progenitors, their connection with magnetars, the presence of one or more classes of FRBs.
Fast radio bursts (FRBs) are enigmatic millisecond-duration pulses of radio light observed across cosmological distances. Their origins and emission mechanisms remain unclear, making FRBs one of the most intriguing new mysteries in astrophysics. The Canadian Hydrogen Intensity Mapping Experiment (CHIME), with its specialized real-time transient-search engine (CHIME/FRB), has emerged as the...
Fast radio burst (FRB) sources show a wide range of repetition rates, with some being able to emit hundreds and even thousands of bursts within hours. This provides a valuable opportunity for studying their burst morphology in detail, investigating their polarisation properties, localising the source to (sub)arcsecond precision, identifying its host galaxy, and searching for any associated...
Fast Radio Bursts (FRBs) are millisecond-duration, bright extragalactic bursts, whose produc- tion mechanism is still unclear. Recently, a persistent radio source (PRS) of non-thermal origin was discovered to be physically associated to two of the repeating FRB sources. These two sources have unusually large Rotation Measure (RM) values, likely tracing a dense magneto- ionic medium, consistent...
Over 15 years after their discoveries, fast radio bursts (FRBs) still elude our understanding, despite the outstanding progress we have witnessed both observationally and theoretically. The huge luminosities of FRBs, and the apparent dichotomy between one-offs and repeaters, are just some of the theoretical challenges posed by such events. Among the countless proposed interpretations of FRBs,...
The physical origin of Fast Radio Bursts (FRBs) is still unknown. Many models consider magnetars as possible FRB sources, supported by the observational association of FRBs with the galactic magnetar SGR 1935+2154. Magnetars are also thought to be the source of the power of a fraction of Gamma Ray Bursts (GRBs), opening the possibility that the two extreme phenomena have a common...
Follow-up observations are crucial to our understanding of fast radio bursts (FRBs), and have enabled studies of their host galaxies and persistent counterparts. As FRB localizations become routine, multi-wavelength simultaneous & post-burst observations will allow us to begin to constrain and characterise the progenitors and the emission mechanisms powering FRBs. In this talk, I will present...
One of the most enigmatic challenges in contemporary time domain radio astronomy is understanding the nature of fast radio bursts (FRBs). These millisecond-duration, highly coherent radio flashes predominantly originate from beyond our Galaxy.
In this presentation, I will review the extensive efforts of the Italian research community in uncovering the origins and physical mechanisms behind...
Fast radio bursts (FRBs) are bright millisecond radio transients observed at extragalactic distances, whose origin is still highly debated. In this presentation, I summarize the key findings from two recent studies that leverage observations conducted with the Northern Cross radio telescope at 408 MHz, aimed at shedding light on the enigmatic FRB phenomenon. We investigated how prevalent...
Fast Radio Bursts are known to exhibit scintillation and scattering phenomena , often attributed to the interaction of multiple screens. A common argument is that two screens, when appearing "pointlike" to each other, scintillate on both scales. This condition is commonly invoked to constrain scattering to FRB host galaxies. In this study, we explore this regime through simulations, revealing...
