Near a black hole, light can actually have 'weight,' and it breaks down in the most bizarre, uneven way.
March 26, 2026
Original Paper
Threshold asymptotics and decay for massive Maxwell on subextremal Reissner--Nordström
arXiv · 2603.23905
The Takeaway
While light is typically massless, some theories suggest 'massive' light particles could be the secret behind dark matter. This paper discovers that these particles don't just disappear near a black hole but follow a specific mathematical 'death rattle' ($t^{-5/6}$), providing a unique signature that astronomers could use to hunt for the universe's missing mass.
From the abstract
We study the neutral massive Maxwell (Proca) equation on subextremal Reissner--Nordström exteriors. After spherical-harmonic decomposition, the odd sector is scalar, while the even sector remains a genuinely coupled $2\times2$ system. Our starting point is that this even system admits an exact asymptotic polarization splitting at spatial infinity. The three resulting channels carry effective angular momenta $\ell-1$, $\ell$, and $\ell+1$, and these are precisely the indices that govern the late-