Samenvatting
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.
Originele taal-2 | English |
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Pagina's (van-tot) | 427-444 |
Aantal pagina's | 18 |
Tijdschrift | Monthly Notices of the Royal Astronomical Society |
Volume | 470 |
Nummer van het tijdschrift | 1 |
DOI's | |
Status | Published - 1-sep.-2017 |