Numerical Simulations of Interacting Galaxies: Bar Morphology

  • J. C. Luna Sánchez
  • M. A. Rodríguez MezaEmail author
  • A. Arrieta
  • R. Gabbasov
Conference paper
Part of the Environmental Science and Engineering book series (ESE)


We present several numerical simulations of the collision of two spiral galaxies. A spiral galaxy is modelled with a spherical bulge and halo and a Freeman disc. The bulge is composed of a collisionless collection of stars; the halo is composed of a set of collisionless particles of unknown nature, we only need to know their gravitational influence and that the halo particles do not collide among them; and the disc is composed of stars only, gas or dust are not considered in this work. A bar is usually formed due to tidal effects after the first encounter of the spirals and we have found that this was the case in all the numerical experiments we did. The bar morphology is then studied during the evolution of the collision process. Here the morphology is the bar formation in the spiral discs, its geometry, i.e., minor and major axis length; and also we show how one of the collision galaxy partners change its disc geometry due to impact of the other galaxy. We show finally how the morphology of spiral galaxies changes due to collision geometrical parameters: impact parameter or the angle between symmetry axes of the spiral discs.


Impact Parameter Spiral Galaxy Disc Plane Spherical Distribution Galaxy Model 
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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • J. C. Luna Sánchez
    • 1
    • 2
  • M. A. Rodríguez Meza
    • 3
    Email author
  • A. Arrieta
    • 2
  • R. Gabbasov
    • 4
  1. 1.Departamento de FísicaInstituto Nacional de Investigaciones NuclearesMexicoMexico
  2. 2.Departamento de Física y MatemáticasUniversidad IberoamericanaMexicoMexico
  3. 3.Instituto Nacional de Investigaciones NuclearesCarretera México-Toluca S/NEstado de MexicoMexico
  4. 4.Instituto de Ciencias Básicas E IngenieríasUniversidad Autónoma de Pachuca, Ciudad UniversitariaPachucaMexico

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