Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Mbh-sigma relation as a constraint on the formation of elliptical
  galaxies   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.

17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org