Fe-bias in the cluster of galaxies Abell 2052

Computer Science – Databases

Scientific paper

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Interstellar Matter, Cameras, Sky Surveys, Interstellar Dust Grains, Diffuse Emission, Infrared Cirrus, Photography, Photographic Instruments, Xerography, Astronomical Catalogs, Atlases, Sky Surveys, Databases, Retrieval Systems, Archives, Etc.

Scientific paper

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 ~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.

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