IXPE Telescope Maps Magnetic Fields in the Lighthouse Nebula

In June 2025, the IXPE mission spent 18 days observing the Lighthouse Nebula to investigate two X-ray structures: a long filament and a shorter, turbulent trail. Scientists have long theorized that the highest-energy particles from the pulsar punch through a bow shock—created by the star's rapid movement—and stream along galaxy-scale magnetic field lines. To verify this, researchers analyzed the polarisation of X-ray light, which reveals the orientation of the underlying magnetic fields.

Stanford undergraduate Jack Dinsmore, who led the study published in the Astrophysical Journal, identified the alignment of these fields as the critical evidence needed to confirm the particle flow. Because the nebula is faint, the team developed advanced analysis methods to maximize data utility, ultimately confirming with over 99% confidence that the magnetic field aligns with the particle stream. Stanford professor Roger Romani noted that the high degree of polarisation measured suggests significantly lower magnetic turbulence than many current models had predicted. Intriguingly, while the X-ray data shows a magnetic field parallel to the trail, radio frequency observations indicate a perpendicular orientation, highlighting the complexity of these extreme stellar remnants.