King's ULX Analogy Links Little Dots Ionization Cones to Off-Axis Super-Eddington Accretion

The paper examines recent JWST observations of Little Dots, arguing their central black holes accrete at highly super-Eddington rates. Hard X-ray cones observed perpendicular to the line of sight provide quantitative geometric support for anisotropic beaming, while soft X-ray emission remains isotropic and powers observed torus emission. This directly parallels stellar-mass ULX behavior scaled to supermassive regimes.

Context from ULX studies, including RXTE and NuSTAR data on SS433's precessing jets and beamed hard X-rays, strengthens the analogy. Earlier claims of isotropic quasar-like emission in high-z sources overlooked orientation effects; the LD cone opening angles align with ULX models predicting 1/50 solid-angle beaming. This reframes LD demographics without requiring new accretion physics.

Future multi-wavelength campaigns targeting LD samples at z>6 could test cone frequency and orientation statistics. Limitations include reliance on a single cone detection and assumptions about cone collimation inherited from Galactic ULXs; larger LD samples with resolved X-ray mapping would raise evidence strength.

The methods rest on geometric modeling of one LD's ionization structure against ULX templates, without new observations or statistical samples.