When two dead stars smash into each other, they can trigger a massive helium explosion that blasts out a ghost-like flood of particles.
March 25, 2026
Original Paper
The Crimson Kiss of Two Giants: Helium Detonation and High-Energy Neutrino Production
arXiv · 2603.22419
The Takeaway
This 'Crimson Kiss' event is a newly proposed type of cosmic explosion that could explain mysterious high-energy particles hitting Earth. It represents a rare event where we could detect light, gravity waves, and neutrinos all from a single collision.
From the abstract
The coalescence of degenerate helium cores during red giant collisions - a process we term erythrohenosis - introduces a novel class of transient astrophysical sources of high-energy neutrinos. Using stellar models generated with MESA and SPH simulations of the final inspiral phase, we develop a semi-analytical model to estimate the amount of hydrogen mixed into the cores, the energy release ($\approx 4.28 \times 10^{49}$ erg) that heats the remnant to $T_f \approx 5.3 \times 10^8$ K, the magnet