The universe’s most extreme dead stars can form from vampire white dwarfs — and scientists finally know how
AI-summarised brief · reviewed before publication
A recent study by ETH Zurich researchers has mapped the precise conditions under which a white dwarf can collapse into a neutron star through accretion‑induced collapse (AIC). The process requires a white dwarf composed of oxygen, neon, and magnesium, which are denser and more massive than typical carbon‑oxygen white dwarfs. The star must accrete material from a companion at a rate that brings it close to the Chandrasekhar limit without exceeding it, preventing a Type Ia supernova. AIC events are expected to be faint, rapid, and eject little matter, distinguishing them from ordinary supernovae.
💡 Why It Matters
- · The discovery clarifies a long‑standing gap in stellar evolution theory, showing that a subset of white dwarfs can become neutron stars without a massive progenitor.
- · This insight refines models of compact‑object populations and informs searches for faint, rapid transients in the cosmos.