Fe-bias in the cluster of galaxies Abell 2052

Fe-bias in the cluster of galaxies Abell 2052

We present radial profiles of the temperature and metallicity of the cluster of galaxies Abell 2052 obtained with XMM-Newton. The temperature is rising from 2 keV in the core of the cluster up to similar to 3 keV around 9'. The iron abundance profile as derived from single-temperature models sh...

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Veröffentlicht in:Proceedings of the International Conference 2009-09, Vol.1248, p.289-290
Hauptverfasser: De Plaa, J, Grange, Y G, Kaastra, J S, Werner, N, Simionescu, A
Format: Artikel
Sprache:eng
Schlagworte:
Abundance
Bias
Clusters
Dipping
Galaxies
Iron
Metallicity
XMM (spacecraft)
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Beschreibung
Zusammenfassung:We present radial profiles of the temperature and metallicity of the cluster of galaxies Abell 2052 obtained with XMM-Newton. The temperature is rising from 2 keV in the core of the cluster up to similar to 3 keV around 9'. The iron abundance profile as derived from single-temperature models shows a dip in the center of the cluster. The dip turns into a peak when multi-temperature models are used to fit the central 1'. This result is a dramatic example of so-called 'Fe bias'. The use of multi-temperature models is necessary in this cluster to obtain accurate abundance values.
ISSN:0094-243X