Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Type Ia and II supernovae contributions to the metal enrichment in
  intra-cluster medium observed with Suzaku   We studied the properties of the intra-cluster medium (ICM) in two clusters
of galaxies (AWM 7 and Abell 1060) and two groups (HCG 62 and NGC 507) with the
X-ray Observatory Suzaku. Based on spatially resolved energy spectra, we
measured for the first time precise cumulative ICM metal masses within 0.1 and
~0.3 r_{180}. Comparing our results with supernova nucleosynthesis models, the
number ratio of type II (SNe II) to type Ia (SNe Ia) is estimated to be ~3.5,
assuming the metal mass in the ICM is represented by the sum of products
synthesized in SNe Ia and SNe II. Normalized by the K-band luminosities of
present galaxies, and including the metals in stars, the integrated number of
past SNe II explosions is estimated to be close to or somewhat higher than the
star formation rate determined from Hubble Deep Field observations.

1
The categories of this paper are: cs
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex