The orbital evolution of binary galaxies

Details The orbital evolution of binary galaxies The orbital evolution of binary galaxies

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...366..418c&link_type=abstract

Astronomy and Astrophysics, v.366, p.418-427 (2001)

Astronomy and Astrophysics

Astrophysics

1

Galaxies: Interactions, Galaxies: Kinematics And Dynamics, Galaxies: Halos

Scientific paper

We present the results of self-consistent numerical simulations performed to study the orbital circularization of binary galaxies. We have generalized a previous model (Junqueira & de Freitas Pacheco 1994) and confirmed partially their results. The orbital evolution of pairs of galaxies is faster when we consider interacting pairs with contacting ``live'' galaxy halos but the circularization time remains larger than the Hubble time. Besides, the time behavior of the orbits has changed in comparison with previous work because of tidal forces and dynamical friction acting on the halos.

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