Superluminous Supernova SN 2024afav Confirms Einstein’s Frame-Dragging Theory

Astronomers have detected a unique “chirping” pattern in the emissions of a superluminous supernova, designated SN 2024afav, providing compelling evidence for Einstein’s theory of General Relativity and a phenomenon known as frame-dragging. The discovery challenges existing models of these powerful stellar explosions and suggests that the immense gravity and spin of a magnetar – a highly magnetized neutron star – are warping the surrounding spacetime.

Initial Discovery and Unexpected Behavior

The initial detection of SN 2024afav occurred on December 12, 2024, by the Liverpool Gravitational Wave Optical Transient Observer (L-GOTO) collaboration [1]. Initially, the object appeared as a typical superluminous supernova, exhibiting the expected brightness and initial light curve characteristics [4]. However, continued observation revealed an unprecedented pattern: a series of regularly spaced “bumps” in the light curve, with the time between these bumps steadily decreasing – a “chirp” in the signal.

The ‘Chirp’ and Its Implications

In physics, a chirp refers to a signal with a frequency that steadily increases over time. In the case of SN 2024afav, its emissions were bumping up and down, but the gap between these bumps was shrinking. After observing the first three bumps, with the gaps between them reduced by roughly 35 percent, researchers were able to predict the timing of subsequent emissions [4]. They adjusted their observation schedule and confirmed the fourth and fifth bumps appeared precisely when anticipated, with the period reduction narrowing to around 29 percent [4].

Frame-Dragging and the Lense-Thirring Effect

The ability to accurately predict the bumps ruled out explanations based on random events, such as supernova ejecta crashing into clouds of gas. Instead, the observations align with the Lense-Thirring effect, also known as frame-dragging – a prediction of General Relativity. This effect describes how a massive spinning object slightly drags the spacetime around it as it rotates [1]. Researchers hadn’t previously considered this mechanism in magnetar models because it had never been observed in this context before.

The Role of the L-GOTO Collaboration

The Liverpool Gravitational Wave Optical Transient Observer (L-GOTO) collaboration, which identified the initial glimmer of SN 2024afav, played a crucial role in this discovery [3]. The L-GOTO project utilizes multiple wide-field telescopes to identify optical counterparts to gravitational wave events [2]. Further monitoring was conducted using the Las Cumbres Observatory’s Global Supernova Project, a network of telescopes that observe supernovae worldwide [3].

Superluminous Supernovae and Magnetars

Superluminous supernovae are among the brightest events in the cosmos, outshining entire galaxies for a short period. They are thought to mark the birth of exotic magnetars – spinning neutron stars with magnetic fields exceeding 10 trillion gauss [3]. These powerful magnetic fields and rapid spin are believed to drive the supernova’s brilliance.

In 2025, the GOTO project detected and reported 6,703 transients (~18 per day), a rise of more than 60% compared to the previous year (~4,060). GOTO was the original discoverer of 2,557 of these transients, an average of 7 per day [2].