The Mbh-sigma relation as a constraint on the formation of elliptical galaxies

Details The Mbh-sigma relation as a constraint on the formation of elliptical galaxies The Mbh-sigma relation as a constraint on the formation of elliptical galaxies

2001-03-21

arxiv.org/abs/astro-ph/0103336v1

Astronomy and Astrophysics

Astrophysics

8 pages, 1 figure. Astrophysical Journal Letters (accepted)

Scientific paper

10.1086/320260

Most elliptical galaxies contain central black holes, whose masses scale proportionally to the observed central velocity dispersions of the host galaxies according to the so-called Mbh-sigma relation. Here we discuss some consequences that can be derived by combining the Mbh-sigma relation with the scaling relation describing the Fundamental Plane of elliptical galaxies. In particular, the possibility of substantial dissipationless merging in the formation and evolution of elliptical galaxies is discussed. Enforcing the merger end-products to satisfy the two scaling relations mentioned above, a major role of dissipation in galaxy formation is strongly suggested by our analysis. Moreover, we show that existing observational data may shed some light on the complex process of black hole merging.

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