Fig. 4: Auto-correlation length, minimum dark matter halo mass and duty cycle for accreting SMBHs as a function of redshift.
From: A little red dot at z = 7.3 within a large galaxy overdensity
Top, middle: comparison of the auto-correlation length (top) and minimum dark matter halo mass (middle) of our results (orange diamond) for LRDs with clustering measurements of quasars22,23,24,84,85,91,94 and broad-line AGNs37. Bottom: summary of literature results on the duty cycle for accreting SMBHs. Also included are measurements from quasar proximity zones90 (grey cross) and Lyα damping wings27,38 (filled circles). The green square marks our recalculation of the duty cycle estimate for a broad-line AGN37 (Methods). The duty cycle fduty should be interpreted as the fraction of cosmic time a galaxy spends in an LRD or quasar phase and is related to the active lifetime by tQ = fdutytH(z), indicated as grey dashed lines in the bottom panel. Vertical error bars denote the 1σ statistical uncertainty on the measurement, whereas horizontal error bars denote the redshift range of the underlying data sample.
