Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraining the Role of SN Ia and SN II in Galaxy Groups by Spatially
  Resolved Analysis of ROSAT and ASCA Observations   We present the results of modelling the distribution of gas properties in the
galaxy groups HCG51, HCG62 and NGC5044, and in the poor cluster AWM7, using
both ASCA SIS and ROSAT data. The spectral quality of the ASCA data allows the
radial distribution in the abundances of several elements to be resolved. In
all systems apart from HCG51, we see both central cooling flows, and a general
decline in metal abundances with radius. The ratio of iron to alpha-element
abundances varies significantly, and in comparison with theoretical supernova
yields, indicates a significant contribution to the metal abundance of the
intergalactic medium (IGM) from type Ia supernovae. This is seen both within
the groups, and also throughout much of the cluster AWM7. The total energy
input into the IGM from supernovae can be calculated from our results, and is
typically 20-40 per cent of the thermal energy of the gas, mostly from SNe II.
Our results support the idea that the SN II ejecta have been more widely
distributed in the IGM, probably due to the action of galaxy winds, and the
lower iron mass to light ratio in groups suggests that some of this enriched
gas has been lost altogether from the shallower potential wells of the smaller
systems.

16
The categories of this paper are: stat
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: math-ph
1
The categories of this paper are: cs