Resolve whether lower-redshift red quasars differ systematically from blue quasars in accretion properties

Determine whether lower-redshift red quasars differ systematically from blue quasars in their accretion properties, particularly their Eddington-ratio distributions, by resolving the currently conflicting observational evidence.

Background

The paper compares studies reaching different conclusions about moderately reddened and radio-selected red quasars at lower redshift. One study finds no evidence for enhanced accretion, whereas another infers higher Eddington ratios for a different red-quasar population. The authors therefore identify the systematic relationship between red and blue quasars as unresolved.

References

There is not yet a consensus on whether lower-redshift red quasars differ systematically from their blue counterparts in their accretion properties.

— A dust-reddened quasar in a [C II]-luminous host at z=6.55  (2610.13758 - Yang et al., 9 Oct 2026) in Section 4.3, “Connection to lower-redshift red quasars”