Making Spirals with Counter-Rotating Disks, the case of NGC 4550

Details Making Spirals with Counter-Rotating Disks, the case of NGC 4550 Making Spirals with Counter-Rotating Disks, the case of NGC 4550

1997-12-02

arxiv.org/abs/astro-ph/9712022v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, Contribution to IAU Symposium 186 "Galaxy Interactions", in press

Scientific paper

A single merger scenario for making galaxies such as NGC 4550 possessing equal coplanar counter-rotating stellar disks is investigated by collisionless N-body technique. The scenario is successful in producing an axisymmetric disk made of two almost equal counter-rotating populations. The final disk shows a clear bimodal line profile in the outer part, which demonstrates that disk-disk mergers do not always produce ellipticals.

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