Bibcode
Peters, S. P. C.; van der Kruit, P. C.; Knapen, J. H.; Trujillo, I.; Fliri, J.; Cisternas, M.; Kelvin, L. S.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 470, Issue 1, p.427-444
Advertised on:
9
2017
Citations
24
Refereed citations
19
Description
We use data from the IAC Stripe82 Legacy Project to study the surface
photometry of 22 nearby, face-on to moderately inclined spiral galaxies.
The reprocessed and combined Stripe 82 g ΄, r
΄ and i ΄ images allow us to probe the
galaxy down to 29-30 r ΄-magnitudes arcsec-2
and thus reach into the very 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 the point spread
function (PSF) can produce faint structures resembling haloes, but this
effect is insufficient to fully explain the observed haloes. The
presence of these haloes and of truncations is mutually exclusive, and
we argue that the presence of a stellar halo and/or light scattered by
the PSF can hide truncations. Furthermore, we find that the onset of the
stellar halo and the truncations scales tightly with galaxy size.
Interestingly, the fraction of light does not correlate with dynamic
mass. Nineteen galaxies are found to have breaks in their profiles, the
radius of which also correlates with galaxy size.
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