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Fast radio bursts (FRBs) are luminous, extragalactic radio transients. New wide-field radio telescopes will enable the detection of many more FRBs, advancing our understanding of their origins and use as cosmic probes.

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Area of Science:

  • Radio Astronomy
  • Astrophysics
  • Cosmology

Background:

  • Radio pulsars, discovered over 50 years ago, confirmed the existence of neutron stars and provided a tool to study extreme physics.
  • Fast Radio Bursts (FRBs) are recently discovered, highly luminous radio transients originating extragalactically, appearing similar to pulsar pulses but with significant dispersive delays.
  • While most FRBs are transient, repeating FRBs suggest a persistent central engine, prompting research into their origins and astrophysical implications.

Purpose of the Study:

  • To provide an accessible introduction to the observational and theoretical aspects of Fast Radio Bursts (FRBs) for astronomers new to the field.
  • To highlight the potential of FRBs as probes of the extragalactic medium and the Universe's extreme physics, analogous to pulsars.
  • To discuss the impact of new wide-field radio instruments on the future discovery rate and study of FRBs.

Main Methods:

  • Review of observational data from radio telescopes, including pulsar surveys and dedicated FRB searches.
  • Theoretical discussion of proposed mechanisms for FRB generation and the properties of their sources.
  • Analysis of the role of telescope field-of-view in limiting current FRB detection rates.

Main Results:

  • FRBs are numerous, with an estimated all-sky event rate of approximately one detectable burst per minute.
  • Current limitations in FRB discovery are primarily due to the small fields-of-view of existing radio telescopes.
  • The advent of new wide-field instruments is poised to significantly increase FRB detection rates, potentially multiple per day.

Conclusions:

  • The increased detection rate facilitated by new instruments will be crucial for distinguishing between various theoretical models for FRB origins.
  • FRBs offer a unique opportunity to study the intergalactic medium and test fundamental physics in extreme environments.
  • The field is on the cusp of major breakthroughs in understanding short-duration radio transients.