TL;DR
Fast Radio Bursts are mysterious, energetic cosmic phenomena with unknown origins, emission mechanisms, and source objects, despite over a decade of research and their cosmological distances.
Contribution
This review synthesizes current knowledge and highlights unresolved questions about the origins, energy sources, and emission processes of Fast Radio Bursts.
Findings
FRBs occur at cosmological distances with high energy output
Their sources and emission mechanisms remain unidentified
Research has yet to determine the exact nature of FRB progenitors
Abstract
More than a decade after their discovery, astronomical Fast Radio Bursts remain enigmatic. They are known to occur at "cosmological" distances, implying large energy and radiated power, extraordinarily high brightness and coherent emission. Yet their source objects, the means by which energy is released and their radiation processes remain unknown. This review is organized around these unanswered questions.
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