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- W2058748046 abstract "Galaxy diversification proceeds by transforming events like accretion, interaction or mergers. These explain the formation and evolution of galaxies that can now be described with many observables. Multivariate analyses are the obvious tools to tackle the datasets and understand the differences between different kinds of objects. However, depending on the method used, redundancies, incompatibilities or subjective choices of the parameters can void the usefulness of such analyses. The behaviour of the available parameters should be analysed before an objective reduction of dimensionality and subsequent clustering analyses can be undertaken, especially in an evolutionary context. We study a sample of 424 early-type galaxies described by 25 parameters, ten of which are Lick indices, to identify the most structuring parameters and determine an evolutionary classification of these objects. Four independent statistical methods are used to investigate the discriminant properties of the observables and the partitioning of the 424 galaxies: Principal Component Analysis, K-means cluster analysis, Minimum Contradiction Analysis and Cladistics. (abridged)" @default.
- W2058748046 created "2016-06-24" @default.
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- W2058748046 date "2012-09-01" @default.
- W2058748046 modified "2023-09-30" @default.
- W2058748046 title "A six-parameter space to describe galaxy diversification" @default.
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- W2058748046 doi "https://doi.org/10.1051/0004-6361/201218769" @default.
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