2006A&A...452..397D


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST12:42:43

2006A&A...452..397D - Astronomy and Astrophysics, volume 452, 397-412 (2006/6-3)

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

DE PLAA J., WERNER N., BYKOV A.M., KAASTRA J.S., MENDEZ M., VINK J., BLEEKER J.A.M., BONAMENTE M. and PETERSON J.R.

Abstract (from CDS):

Using 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.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: Sersic 159-03 - galaxies: abundances - intergalactic medium - X-rays: galaxies: clusters

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ZwCl 0335+0956 ClG 03 38 35.3 +09 57 54           ~ 343 1
2 ACO 496 ClG 04 33 30.3838 -13 14 21.584           ~ 660 2
3 NAME Hya A LIN 09 18 05.651 -12 05 43.99   14.38 14.8     ~ 908 1
4 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4208 2
5 NAME NGC 5920 Group ClG 15 21 50.7 +07 42 18     15.13     ~ 287 0
6 ACO 2256 ClG 17 03 43.5 +78 43 03           ~ 830 1
7 ACO S 1101 ClG 23 13 58.5 -42 43 39           ~ 233 1

    Equat.    Gal    SGal    Ecl

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2020.07.12-12:42:43

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