Astrocladistics: a phylogenetic analysis of galaxy evolution II. Formation and diversification of galaxies

Simple item page
dc.creatorFraix-Burnet, Didier
dc.creatorDouzery, Emmanuel J. P.
dc.creatorCholer, Philippe
dc.creatorVerhamme, Anne
dc.date2006-02-27
dc.date.accessioned2026-07-07T07:00:52Z
dc.date.available2026-07-07T07:00:52Z
dc.descriptionThis series of papers is intended to evaluate astrocladistics in reconstructing phylogenies of galaxies. The objective of this second paper is to formalize the concept of galaxy formation and to identify the processes of diversification. We show that galaxy diversity can be expected to organize itself in a hierarchy. In order to better understand the role of mergers, we have selected a sample of 43 galaxies from the GALICS database built from simulations with a hybrid model for galaxy formation studies. These simulated galaxies, described by 119 characters and considered as representing still undefined classes, have experienced different numbers of merger events during evolution. Our cladistic analysis yields a robust tree that proves the existence of a hierarchy. Mergers, like interactions (not taken into account in the GALICS simulations), are probably a strong driver for galaxy diversification. Our result shows that mergers participate in a branching type of evolution, but do not seem to play the role of an evolutionary clock.
dc.description14 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0602580
dc.identifierhttp://arxiv.org/abs/astro-ph/0602580
dc.identifierJournal of Classification 23 (2006) XX
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/108110
dc.subjectAstrophysics
dc.titleAstrocladistics: a phylogenetic analysis of galaxy evolution II. Formation and diversification of galaxies
dc.typetext

Files

Collections

arXiv