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Slow supermassive black hole growth in normal star-forming galaxies over 4 < z < 7

Paper Authors:

Suin Matsui,

Kazuhiro Shimasaku,

Kei Ito,

Makoto Ando,

Takumi S. Tanaka

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Key Details

Normal star-forming galaxies have slow supermassive black hole growth compared to expectations

Quasars show rapid supermassive black hole growth outpacing host galaxies

Simulations overpredict inactive galaxy black hole accretion, implying simulated black holes are too massive

Major differences exist in supermassive black hole-galaxy co-evolution paths beyond z~4

AI generated summary

Slow supermassive black hole growth in normal star-forming galaxies over 4 < z < 7

X-ray stacking of ~12,000 normal star-forming galaxies (Lyman-break galaxies) from z~4-7 finds supermassive black holes growing much slower than expected if evolving in lockstep with host galaxies. This contrasts with quasars having rapid black hole growth. Simulations overpredict inactive galaxy black hole accretion rates, suggesting simulated black holes are too massive.

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