Researchers suggest paired black holes pulled by cosmic expansion could seem to be one entity

Contour plot showing the level sets of the lapse function N. The cosmological horizon is the outer solid black semicircle. The horizon axes has the two black hole horizons as solid magenta lines, and the outer and inner axes in dashed black lines. The green square is where N takes its maximum value. Credit: Physical Review Letters (2023). DOI: 10.1103/PhysRevLett.131.131401

A small team of astrophysicists and mathematicians from the University of Southampton, the University of Cambridge and…

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News Source: phys.org