Direct black-hole mass measurement in a little red dot at high redshift (nature.com)

• Dynamical mass of 50 million solar masses for black hole in LRD at z=7.04
• Keplerian rotation confirms point mass, excludes nuclear star cluster
• Black-hole-to-stellar-mass ratio >2, far above local relations
• Supports heavy seed black hole models (direct collapse or primordial)

"Astronomers directly measured the mass of a black hole in a strongly lensed 'little red dot' at redshift 7.04 using JWST. Keplerian rotation reveals 50 million solar masses, consistent with virial estimates. The black hole dominates over its host galaxy, with mass-to-stellar-mass ratio >2, suggesting a naked black hole seed in a near-pristine environment. This supports heavy seed scenarios like direct collapse or primordial black holes."