Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: X-ray clusters of galaxies in conformal gravity   We run adiabatic N-body/hydrodynamical simulations of isolated
self-gravitating gas clouds to test whether conformal gravity, an alternative
theory to General Relativity, is able to explain the properties of X-ray galaxy
clusters without resorting to dark matter. We show that the gas clouds rapidly
reach equilibrium with a density profile which is well fit by a beta-model
whose normalization and slope are in approximate agreement with observations.
However, conformal gravity fails to yield the observed thermal properties of
the gas cloud: (i) the mean temperature is at least an order of magnitude
larger than observed; (ii) the temperature profiles increase with the square of
the distance from the cluster center, in clear disagreement with real X-ray
clusters. These results depend on a gravitational potential whose parameters
reproduce the velocity rotation curves of spiral galaxies. However, this
parametrization stands on an arbitrarily chosen conformal factor. It remains to
be seen whether a different conformal factor, specified by a spontaneous
breaking of the conformal symmetry, can reconcile this theory with
observations.

36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat