Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The merging cluster Abell 85 caught between meals by XMM-Newton   Our XMM-Newton observations of Abell 85 confirm the extended 4 Mpc filament
first detected with ROSAT, which has an X-ray temperature of about 2 keV and is
probably made of groups falling on to the cluster. A comparison of the
temperature map with numerical simulations show that Abell 85 had intense
merging activity in the past and is not fully relaxed, even in the central
region. Finally, a deprojected temperature profile has been calculated and
used, together with the suface brightness, to estimate the entropy and pressure
profiles. Abell 85 only presents a mild flattening of the entropy profile in
the center, showing no evidence of an ``entropy floor''.

28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg