We finally found a 'dead' pair of stars that explains why thousands of star couples we expected to see in the sky are just missing.
March 16, 2026
Original Paper
ZTF J021804.16+071152.93: a dead cataclysmic variable and potential solution to the missing period bouncers
arXiv · 2603.12888
The Takeaway
Models predicted that half of all 'vampire' star systems should eventually slow down and sit close together, yet we almost never see them. This discovery shows that a hidden magnetic field can suddenly emerge and shove the stars apart, 'hiding' them for billions of years and solving a major cosmic mystery.
From the abstract
It is predicted that half or more of all cataclysmic variables (CVs) should have evolved past the period minimum and now exist as so-called "period bouncers" where a white dwarf should be accreting from a Roche-lobe filling substellar companion. However, this prediction stands in stark contrast to observations, where only a few per cent of CVs are found in this evolutionary phase. A potential solution to this discrepancy is that a magnetic field emerges from within the white dwarf after the syst