Morphology-dependent trends of galaxy age with environment in Abell 901/902 seen with COMBO-17

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dc.creatorWolf, C.
dc.creatorGray, M. E.
dc.creatorAragon-Salamanca, A.
dc.creatorLane, K. P.
dc.creatorMeisenheimer, K.
dc.date2006-11-30
dc.date.accessioned2026-07-07T10:21:05Z
dc.date.available2026-07-07T10:21:05Z
dc.descriptionWe investigate correlations between galaxy age and environment in the Abell 901/2 supercluster for separate morphologies. Using COMBO-17 data, we define a sample of 530 galaxies, complete at $M_V -5\log h<-18$ on an area of $3.5\times 3.5$ (Mpc/$h$)$^2$. We explore several age indicators including an extinction-corrected residual from the colour-magnitude relation (CMR). As a result, we find a clear trend of age with density for galaxies of all morphologies that include a spheroidal component, in the sense that galaxies in denser environments are older. This trend is not seen among Scd/Irr galaxies since they all have young ages. However, the trend among the other types is stronger for fainter galaxies. While we also see an expected age-morphology relation, we find no evidence for a morphology-density relation at fixed age.
dc.descriptionAccepted for publication in MNRAS (Letters)
dc.identifierhttps://arxiv.org/abs/astro-ph/0611935
dc.identifierhttp://arxiv.org/abs/astro-ph/0611935
dc.identifierMon.Not.Roy.Astron.Soc.Lett.376:L1-L5,2007
dc.identifierdoi:10.1111/j.1745-3933.2006.00272.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/175059
dc.subjectAstrophysics
dc.titleMorphology-dependent trends of galaxy age with environment in Abell 901/902 seen with COMBO-17
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