Two z~6.6 galaxies host overmassive black holes and show remnant ionized bubbles from recent quasar episodes, with BH-to-stellar mass ratios 400-800 times above the local relation.
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High-redshift quasars at 5<z<6.2 reside in dark matter halos of log(M_h/M_sun) ~12.1-12.5 with duty cycles of 0.0002-0.002 indicating obscured black hole growth.
citing papers explorer
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Life After the Quasar: Overmassive Black Holes and Remnant Ionised Bubbles in and Around Two z~6.6 Galaxies
Two z~6.6 galaxies host overmassive black holes and show remnant ionized bubbles from recent quasar episodes, with BH-to-stellar mass ratios 400-800 times above the local relation.
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Probing The Dark Matter Halo of High-redshift Quasar from Wide-Field Clustering Analysis
High-redshift quasars at 5<z<6.2 reside in dark matter halos of log(M_h/M_sun) ~12.1-12.5 with duty cycles of 0.0002-0.002 indicating obscured black hole growth.