Origin and physical cause of fast radio bursts (FRBs)

Determine the origin and physical cause of fast radio bursts (FRBs), including identifying the progenitor systems and mechanisms responsible for these short, energetic radio pulses observed in diverse extragalactic host galaxies, to explain their production and nature.

Background

Adaeze Lorreta Ibik describes her PhD research focus on bright explosions in the universe, particularly fast radio bursts (FRBs) and superluminous supernovae (SLSNe). FRBs are extremely short-duration radio flashes originating from distant galaxies. Recent observations show FRBs occur in a variety of host environments, yet their progenitors remain unidentified.

Her work uses radio imaging data to locate FRB progenitors and investigate their causes. The explicit statement highlights that, despite growing observational samples and host identifications, the fundamental origin of FRBs is not yet understood, marking this as a central open problem in time-domain astrophysics.

References

“FRBs are short energetic mysterious lightening coming from distant galaxies in the Universe. Recent discoveries have shown that some come from different types of galaxies beyond our Milky Way, but we still don't understand their origin or what causes them.”

— Inspiring stories from women in astronomy in Africa  (2510.05195 - Muheki et al., 6 Oct 2025) in Section “Understanding the Universe — Adaeze Lorreta Ibik”; Page 32 (profile)

Despite these advances, the physical origin of FRB emission and the nature of their central engines remain open questions.

— A Bayesian Framework for Constraining Magnetar Magnetic Fields from Repeating FRB Statistics  (2608.26857 - Deng et al., 27 Aug 2026) in Section 1, Introduction

While observations disfavor the association of FRB~121102 with an AGN \citep{2023Hallinan-FRB-PRS-No-AGN}, this option cannot yet be ruled out.

— FRB 121102: No supernova-like ejecta or magnetar power, hinting at a binary WD merger  (2608.26567 - Waxman et al., 27 Aug 2026) in Section 1, Introduction

Although this event provides the only direct multi-wavelength calibration available at present, its applicability to cosmological FRBs remains uncertain.

— A Bayesian Framework for Constraining Magnetar Magnetic Fields from Repeating FRB Statistics  (2608.26857 - Deng et al., 27 Aug 2026) in Section 4, Discussion

Notwithstanding this substantial progress, the physical origin of FRBs remains among the most outstanding open questions in modern astrophysics.

— A Brief Review on the Statistical Properties of Fast Radio Bursts  (2609.25810 - Sang et al., 22 Sep 2026) in Section 1, Introduction

While the exact triggering mechanism remains to be pinpointed, the unified empirical framework established by these statistical analyses provides indispensable constraints for any viable theoretical model aiming to explain the burst generation and emission physics of these enigmatic sources.

— A Brief Review on the Statistical Properties of Fast Radio Bursts  (2609.25810 - Sang et al., 22 Sep 2026) in Section 3.5, Summary

The physical driver of periodicity remains unclear.

— A Brief Review on the Statistical Properties of Fast Radio Bursts  (2609.25810 - Sang et al., 22 Sep 2026) in Section 4.5, Summary and Future Prospects

Self-organised criticality in magnetar crusts, coupled with magnetospheric emission and binary interactions, appears to be a promising avenue, but detailed quantitative models that can be directly confronted with data are still lacking.

— A Brief Review on the Statistical Properties of Fast Radio Bursts  (2609.25810 - Sang et al., 22 Sep 2026) in Section 6, Looking Ahead

The physical origin of FRBs is still unknown, and many FRB progenitor models have been proposed in the last years (see, e.g., \citealp{2019PhR...821....1P}).

— Exploring the connection between Fast Radio Bursts and binary neutron star mergers  (2609.05209 - Patricelli et al., 4 Sep 2026) in Section 1, Introduction