The environmental dependence of the structure of galactic discs in STAGES S0 galaxies: implications for S0 formation
- Maltby, David Terence
- Aragón-Salamanca, Alfonso
- Gray, Meghan E.
- Hoyos, Carlos
- Wolf, Christian
- Jogee, Shardha
- Böhm, Asmus
DOIAbstract
We present an analysis of V-band radial surface brightness μ(r) profiles for S0 galaxies in different environments using Hubble Space Telescope/Advanced Camera for Surveys imaging and data from the Space Telescope A901/2 Galaxy Evolution Survey. Using a large sample of ∼280 field and cluster S0s, we find that in both environments, ∼25 per cent have a pure exponential disc (type I) and ∼50 per cent exhibit an up-bending disc break (antitruncation, type III). However, we find hardly any (<5 per cent) down-bending disc breaks (truncations, type II) in our S0s and many cases (∼20 per cent) where no discernible exponential component was observed (i.e. general curvature). We also find no evidence for an environmental dependence on the disc scalel...
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