Broad-band host measurements of little red dots and similar compact nuclei require source-conditioned polychromatic PSFs

Characterizing compact sources in the early Universe is difficult because light from physically distinct components can overlap within the same diffraction-limited image.

Characterizing compact sources in the early Universe is difficult because light from physically distinct components can overlap within the same diffraction-limited image. A common method uses field stars to model how a single point of light appears and from this estimates the…