Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the metal abundance in the core of M87   We revisit the XMM-Newton observation of M87 to make a new and more detailed
measurement of the metal abundance profile. After having verified that spectral
fits with single temperature models show a dramatic abundance drop within 1
arcmin of the cluster core, we show that more appropriate models, which include
a multi-temperature component to account for the strong temperature gradient
observed in M87, and a power-law component to account for the emission of the
nucleus and knot A, give a substantially flat abundance profile. The drastic
abundance decrement found by fitting a single temperature component to the data
is an artifact known as "Fe-bias" (Buote 2000a,b) following from the
application of an oversimplified spectral model to the data.

1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg