Encounters between spherical galaxies - I. Systems without a dark halo

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 01 Aug 2005Embargo end date: 01 Jan 2005 Netherlands English Publisher:Oxford University Press (OUP)Journal:Monthly Notices of the Royal Astronomical Society, volume 361, pages 1,030-1,042 (issn: 0035-8711, eissn: 1365-2966,

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Authors: Gonzalez-Garcia, A. C.; van Albada, T. S.;

Encounters between spherical galaxies - I. Systems without a dark halo

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Abstract

We performe N-body simulations of encounters between spherical systems surrounded by a spherical halo. Following a preceding paper with a similar aim, the initial systems include a spherical Jaffe model for the luminous matter and a Hernquist model for the halo. The merger remnants from this sample are mainly slowly rotating, prolate spheroids with a radially anisotropic velocity distribution. The results are compared with real-life ellipticals and with the models without halo in paper I. We argue that elliptical galaxies with evidence of dark matter could be formed in the field via a merger of spheroids surrounded by a dark matter halo, while ellipticals with no evidence of dark matter might be formed via a merger of two spheroids in a cluster.

12 pages, 15 figures, accepted for publication in MNRAS. High res. version avaible at http://www.iac.es/folleto/research/Publi02/preprints05.htm

Country

Netherlands

Related Organizations

Spanish National Research Council
Spain
Kapteyn Astronomical Institute
Netherlands
University of Groningen
Netherlands
Instituto de Astrofísica de Canarias
Spain

Keywords

DYNAMICS, COLLISIONS, SAMPLE, elliptical, MERGERS, POTENTIALS, FOS: Physical sciences, galaxies : kinematics and dynamics, galaxies : interactions, Astrophysics, BULGES, cD, ELLIPTIC GALAXIES, Galaxies: structure, kinematics and dynamics [galaxies], galaxies : elliptical and lenticular, galaxies : structure, INTRINSIC SHAPE, Methods: N-body simulations, methods : N-body simulations, Instituto de Ciencias del Patrimonio, interactions [galaxies], structure-elliptical [galaxies], Astrophysics (astro-ph), Galaxies: kinematics and dynamics, SIMULATIONS, EVOLUTION, Galaxies: interactions, KINEMATIC SUBSYSTEMS, galaxies: structure-elliptical, Institute of Heritage Sciences, MERGING GALAXIES, Galaxies: elliptical and lenticular, cD, STELLAR DYNAMICS, DENSITY, FUNDAMENTAL PLANE, Incipit, LUMINOSITY, structure [galaxies], CLUSTERS, N-body simulations [methods], elliptical and lenticular, cD [galaxies]

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