A Model for the Cartwheel Ring Galaxy |
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| Authors: | C Horellou F Combes |
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| Institution: | (1) Onsala Space Observatory, Chalmers University of Technology, S-439 92 Onsala, Sweden;(2) Observatoire de Paris, DEMIRM, 61 Av. de l'Observatoire, F-75014 Paris, France |
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| Abstract: | A new model of the Cartwheel galaxy is presented, based on the nearly central inclined collision of a rigid companion galaxy
with a self-gravitating disc containing both stars and gas. We assume that the intruder is the most distant companion (G3
in J. Higdon's notation). Two rings and a transient network of gaseous spokes develop after the passage of the companion.
The expansion velocity of the outer ring is in agreement with the one observed for the atomic gas. At the end of the simulation,
the position and velocity of the companion agree with those of G3.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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