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Astrophysics and Space Science

, Volume 286, Issue 3–4, pp 381–395 | Cite as

Tidal disruption model for the interacting pair of galaxies VV 117 (NGC 2444/45)

  • K.S.V.S. Narasimhan
  • P.M.S. Namboodiri
  • S.M. Alladin
Article
  • 27 Downloads

Abstract

A series of N-body simulations have been performed to interpret the interacting pair of galaxies VV 117 (NGC 2444/45). The galaxies have been modelled assuming a mass ratio two. The simulations use various values for the distance of closest approach and the eccentricity of the relative orbit of the pair. A plausible scenario for the tidal disruption of the less massive galaxy is proposed. NGC2444, having double the mass of NGC 2445, has undergone penetrating collision with the latter in a hyperbolic or a parabolic orbit. After the first collision, the orbit has become bound. Our results show that VV 117 has either just emerged from the first collision or are on the verge of a second collision. NGC 2445suffers considerable disruption and mass loss. NGC 2444 is not affected much. The second collision is expected to culminate in the merger of the two galaxies.

stellar dynamics galaxies: interactions tidal model for VV 117 methods: numerical 

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • K.S.V.S. Narasimhan
    • 1
  • P.M.S. Namboodiri
    • 2
  • S.M. Alladin
    • 3
  1. 1.Inter-University Centre for Astronomy and AstrophysicsPuneIndia
  2. 2.Indian Institute of AstrophysicsBangaloreIndia
  3. 3.Department of AstronomyOsmania UniversityHyderabadIndia

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