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bibo:Article rdac:C10001

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n11:cosmologyincludingclustersofgalaxies n13:galaxiesellipticalmidlenticularcd n13:methodsnumerical n13:galaxiesfundamentalparameters

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Dissipationless collapse of spherical protogalaxies and the fundamental plane

dcterms:date

2002-01-01

rdaw:P10072

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marcrel:aut

n2:capelatohv n2:dantascc n2:decarvalhorr n2:ribeiroalb

dcterms:abstract

Following on from the numerical work of Capelato et al. (1995, 1997), where dissipationless merger simulations were shown to reproduce the “Fundamental Plane" (FP) of elliptical galaxies, we investigate whether the end products of pure, spherically symmetric, one-component dissipationless collapses could also reproduce the FP. Past numerical work on collisionless collapses have addressed important issues on the dynamical/structural characteristics of collapsed equilibrium systems. However, the study of collisionless collapse in the context of the nature of the FP has not been satisfactorily addressed yet. Our aim in this paper is to focus our attention on the resulting collapse of simple one-component spherical models with a range of different initial virial coefficients. We find that the characteristic correlations of the models are compatible with virialized, centrally homologous systems. Our results strengthen the idea that merging may be a fundamental ingredient in forming non-homologous objects.

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n14:researcharticle

hub:publisher-id

aa1622

dcterms:dateCopyrighted

2002-01-01

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© ESO, 2002

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ESO

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