Abstract
Out near the edge of the visible universe, something flickers: brief bursts of radio energy lasting barely a moment. These signals, spotted only by chance at first, now arrive in steady streams thanks to instruments like ASKAP, CHIME, FAST, and MeerKAT. Instead of puzzling endlessly over their origin, scientists shift focus toward whether they can serve another purpose entirely. One pattern stands out, specifically the link between how much the signal spreads out in frequency and how far it has traveled, a connection once doubted but now taken seriously as a cosmological diagnostic. It turns out such bursts carry clues about invisible matter strewn between galaxies. Their paths reveal where ordinary baryonic matter hides, even when telescopes cannot detect it directly. Recent years brought sharper localization, allowing teams to identify exact host galaxies almost as soon as flashes appear. What seemed like noise not long ago begins to look like a precision measuring tool, one tuned to the large-scale structure of space itself. The Galactic magnetar SGR 1935+2154 produced an FRB-like burst that anchored the progenitor discussion in a physically grounded framework, validating the emission mechanism and improving how the dispersion measure budget is modeled. Because these events tie directly into magnetar emission physics, they offer a calibration anchor for the distance measurement chain. Alongside that come outstanding questions, including whether current statistical frameworks capture enough detail or whether key systematic noise factors remain underestimated. As new tools like the Square Kilometre Array prepare to detect more events with sharper localization precision, gaps remain in interpretation. Among them sit poorly constrained contributions from host galaxy interstellar media, inhomogeneous intergalactic matter distributions, and unresolved patterns in repeating source demographics. Without overselling progress, the field moves forward by facing those specific hurdles directly. What lies ahead depends less on optimism than on resolving concrete, well-defined problems now.
KEYWORDS
Fast Radio Bursts, Intergalactic Medium, Dispersion Measure, Macquart Relation, Missing Baryons.
Saurabh Chaturvedi1*, Gyaneshwari Singh2, Omkar Prasad Tripathi3
1,2,3Department of Physics, AKS University, Satna- 485001, Madhya Pradesh, India