Local Group Dwarf Galaxy Detection Limit in the CSST survey

Understand

We predict the dwarf galaxy detection limits for the upcoming Chinese Space Station Telescope (CSST) survey that will cover 17,500 deg$^{2}$ of the sky with a wide field of view of 1.1 deg$^2$.

• The point-source depth reaches 26.3 mag in the $g$ band and 25.9 mag in the $i$ band.
• Constructing mock survey data based on the designed photometric bands, we estimate the recovery rate of artificial dwarf galaxies from mock point-source photometric catalogues.
• The detection of these artificial dwarf galaxies is strongly dependent on their distance, magnitude and size, in agreement with searches in current surveys.