Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Galaxy merging and the Fundamental Plane of elliptical galaxies   We present preliminary results of numerical simulations of dissipationless
merging of stellar systems, aimed at exploring the consequences of merging
between gas free, spheroidal systems. In particular, we study the dynamical and
structural characteristics of hierarchical merging between equal mass stellar
systems, and we compare the properties of the end-products with the most
important structural and dynamical scaling relations obeyed by spheroids. In
the explored hierarchy of four successive mergings we find that the FP tilt is
marginally conserved, but both the Faber-Jackson and Kormendy relations are not
conserved.

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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-th
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The categories of this paper are: physics
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The categories of this paper are: eess
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The categories of this paper are: supr-con
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: cond-mat
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The categories of this paper are: econ
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The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph