Formation of massive counter-rotating disks: an alternative scenario

Details Formation of massive counter-rotating disks: an alternative scenario Formation of massive counter-rotating disks: an alternative scenario

1999-03-06

arxiv.org/abs/astro-ph/9903096v1

Astrophys.Space Sci. 276 (2001) 909-914

Astronomy and Astrophysics

Astrophysics

7 pages, 3 figures, contribution to "The Evolution of Galaxies on Cosmological Timescales", Euroconference, Puerto de la Cruz,

Scientific paper

10.1023/A:1017581325673

In this contribution, we investigate the scenario of major mergers between galaxies of comparable mass to the formation of massive counter-rotating disks. Such a scenario can be ruled out in general because they produce rather ellipticals. Yet for a narrow range of initial conditions, major mergers can nevertheless produce anyway rare galaxies such as NGC 4550, and so they are viable alternatives for the formation of these counter-rotating systems. The scenario is successful in producing a remarkably axisymmetric disk possessing strongly counter-rotating populations.

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