Supernova Mystery Solved: Magnetar Power Revealed

Scientists are unraveling the enigma of superluminous supernovae, exceptionally bright stellar explosions. One recent event, first observed in December 2024, has provided crucial clues. Researchers studying this supernova determined its extreme luminosity stemmed from a newly formed magnetar at its core.

A magnetar, a neutron star with an extraordinarily powerful magnetic field, is believed to be the energy source. As it spins hundreds of times per second, it sweeps up charged particles, flinging them into the expanding stellar debris. This process amplifies the explosion's brightness.

Further contributing to its unique display, the supernova exhibited brightness undulations. This phenomenon is attributed to Lense-Thirring precession, where the spinning magnetar warps spacetime, causing its surrounding disk to wobble. This wobble affects energy transfer, creating variations in the supernova's luminosity over months.

This discovery confirms a hypothesis proposed in 2010 about magnetars powering superluminous events. The star that exploded was likely extremely massive, many dozens of times the sun's mass and hundreds of thousands of times its luminosity. These superluminous events far outshine typical supernovas, with one observed having the luminosity of the entire Milky Way galaxy.