Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The impact of gas physics on strong cluster lensing   Previous studies of strong gravitational lensing by galaxy clusters neglected
the potential impact of the intracluster gas. Here, we compare simulations of
strong cluster lensing including gas physics at increasing levels of
complexity, i.e. with adiabatic, cooling, star-forming, feedback-receiving, and
thermally conducting gas, and with different implementations of the artificial
viscosity in the SPH simulations. Each cluster was simulated starting from the
same initial conditions such as to allow directly comparing the simulated
clusters. We compare the clusters' shapes, dynamics and density profiles and
study their strong-lensing cross sections computed by means of ray-tracing
simulations. We find that the impact of adiabatic gas depends on the amount of
turbulence that builds up, which means that the artificial viscosity plays an
important role. With the common viscosity implementation, adiabatic gas has
little effect on strong cluster lensing, while lower viscosity allows stronger
turbulence, thus higher non-thermal pressure and a generally broader gas
distribution which tends to lower lensing cross sections. Conversely, cooling
and star formation steepen the core density profiles and can thus increase the
strong-lensing efficiency considerably.

16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th