Extended Data Fig. 5: 1.3-mm continuum (top) and [C ii] (bottom) size measurement results.
From: A dusty compact object bridging galaxies and quasars at cosmic dawn
Left: Observed map, which is the same as Extended Data Fig. 3a. Middle: Residual map by subtracting the best-fit model visibility obtained with uvmodelfit. For the dust continuum, we subtract the best-fit model visibility by fixing the major-axis effective radius as the upper limit value of re,FIR = 0.48 kpc. The visibility of ND1 is subtracted by assuming its profile as a point source before running uvmodelfit. Right: Amplitude as a function of uv distance. The black circles shows the observed visibility. The error bars show the standard error of the mean in each uv distance bin. The red curve denotes the best-fit uv model for the [C ii] line, while the red dashed curve for the dust continuum indicates the uv model with the upper limit size.
