Chemical evolution in Sersic 159-03 observed with XMM-Newton

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dc.creatorde Plaa, J.
dc.creatorWerner, N.
dc.creatorBykov, A. M.
dc.creatorKaastra, J. S.
dc.creatorMendez, M.
dc.creatorVink, J.
dc.creatorBleeker, J. A. M.
dc.creatorBonamente, M.
dc.creatorPeterson, J. R.
dc.date2006-02-27
dc.date.accessioned2026-07-07T07:00:53Z
dc.date.available2026-07-07T07:00:53Z
dc.descriptionUsing a new long X-ray observation of the cluster of galaxies Sersic 159-03 with XMM-Newton, we derive radial temperature and abundance profiles using single- and multi-temperature models. The fits to the EPIC and RGS spectra prefer multi-temperature models especially in the core. The radial profiles of oxygen and iron measured with EPIC/RGS and the line profiles in RGS suggest that there is a dip in the O/Fe ratio in the centre of the cluster compared to its immediate surroundings. A possible explanation for the large scale metallicity distribution is that SNIa and SNII products are released in the ICM through ram-pressure stripping of in-falling galaxies. This causes a peaked metallicity distribution. In addition, SNIa in the central cD galaxy enrich mainly the centre of the cluster with iron. This excess of SNIa products is consistent with the low O/Fe ratio we detect in the centre of the cluster. We fit the abundances we obtain with yields from SNIa, SNII and Population-III stars to derive the clusters chemical evolution. We find that the measured abundance pattern does not require a Population-III star contribution. The relative contribution of the number of SNIa with respect to the total number of SNe which enrich the ICM is about 25-50%. Furthermore, we discuss the possible presence of a non-thermal component in the EPIC spectra. A potential source of this non-thermal emission can be inverse-Compton scattering between Cosmic Microwave Background (CMB) photons and relativistic electrons, which are accelerated in bow shocks associated with ram-pressure stripping of in-falling galaxies.
dc.description18 pages, 11 figures, Accepted for publication in Astronomy & Astrophysics
dc.identifierhttps://arxiv.org/abs/astro-ph/0602582
dc.identifierhttp://arxiv.org/abs/astro-ph/0602582
dc.identifierAstron.Astrophys. 452 (2006) 397-412
dc.identifierdoi:10.1051/0004-6361:20053864
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/108112
dc.subjectAstrophysics
dc.titleChemical evolution in Sersic 159-03 observed with XMM-Newton
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