Figure 5 - uploaded by Eleazar Rodrigo Carrasco
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Images of distant galaxies as seen by GSAOI (left, including photometric redshifts of Castellano et al. 2016) and HAWK-I (right, 5 times enlarged). The detection limit for the blurred HAWK-I data is mostly independent of the intrinsic source profiles.
Source publication
Multi-conjugated adaptive optics (MCAO) yield nearly diffraction-limited images at 2$\mu$m wavelengths. Currently, GeMS/GSAOI at Gemini South is the only MCAO facility instrument at an 8m telescope. Using real data and for the first time, we investigate the gain in depth and S/N when MCAO is employed for $K_{\rm s}$-band observations of distant gal...
Context in source publication
Context 1
... way to compare the images are number counts. The in- terpretation is not straight forward though, because most distant galaxies have angular diameters smaller than the natural seeing. Once convolved by the natural seeing PSF, the galaxy images have approximately the same size (Fig. 5) and respond uniformly to the detection filters. The de- tection limit in MCAO data, on the other hand, depends on the sources' light profiles. A faint and compact object may easily be detected in the MCAO data, but not in a classical image. Likewise, each pixel of an extended low sur- face brightness galaxy could be pushed below the ...
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