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We use data from the IAC Stripe82 Legacy Project to study the surfacephotometry of 22 nearby, face-on to moderately inclined spiral galaxies. Thereprocessed and combined Stripe 82 $g'$, $r'$ and $i'$ images allow us to probethe galaxy down to 29-30 $r'$-magnitudes/arcsec$^2$ and thus reach into thevery faint outskirts of the galaxies. Truncations are found in three galaxies.An additional 15 galaxies are found to have an apparent extended stellar halo.Simulations show that the scattering of light from the inner galaxy by thePoint Spread Function (PSF) can produce faint structures resembling haloes, butthis effect is insufficient to fully explain the observed haloes. The presenceof these haloes and of truncations is mutually exclusive, and we argue that thepresence of a stellar halo and/or light scattered by the PSF can hidetruncations. Furthermore, we find that the onset of the stellar halo and thetruncations scales tightly with galaxy size. Interestingly, the fraction oflight does not correlate with dynamic mass. Nineteen galaxies are found to havebreaks in their profiles, the radius of which also correlates with galaxy size.

Stellar Disc Truncations and Extended Haloes in Face-on Spiral Galaxies