In:
Acta Polytechnica, Czech Technical University in Prague - Central Library, Vol. 53, No. A ( 2013-12-18), p. 583-588
Abstract:
We studied the properties of the intracluster medium (ICM) of galaxy clusters to outer regions observed with Suzaku. The observed temperature dropped by about ~30% from the central region to the virial radius of the clusters. The derived entropy profile agreed with the expectation from simulations within 〈 em 〉 r 〈 sub 〉 500 〈 /sub 〉 〈 /em 〉 , while the entropy profile in 〈 em 〉 r & gt; r 〈 sub 〉 500 〈 /sub 〉 〈 /em 〉 indicated a flatter slope than the simulations. This would suggest that the cluster outskirts were out of hydrostatic equilibrium. As for the metallicity, we studied the metal abundances from O to Fe up to ~0.5 times the virial radius of galaxy groups and clusters. Comparing the results with supernova nucleosynthesis models, the number ratio of type II to Ia supernovae is estimated to be ~3.5. We also calculated not only Fe, but also O and Mg mass-to-light ratios (MLRs) with K-band luminosity. The MLRs in the clusters had a similar feature.
Type of Medium:
Online Resource
ISSN:
1805-2363
,
1210-2709
DOI:
10.14311/AP.2013.53.0583
Language:
Unknown
Publisher:
Czech Technical University in Prague - Central Library
Publication Date:
2013
detail.hit.zdb_id:
2575330-7
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