J/A+A/578/A46 Evolution of galaxy clusters metal abundance (Ettori+, 2015)
The evolution of the spatially-resolved metal abundance in galaxy clusters
up to z=1.4.
Ettori S., Baldi A., Balestra I., Gastaldello F., Molendi S., Tozzi P.
<Astron. Astrophys. 578, A46 (2015)>
=2015A&A...578A..46E 2015A&A...578A..46E
ADC_Keywords: Clusters, galaxy ; Redshifts ; Abundances
Keywords: galaxies: clusters: intracluster medium - X-rays: galaxies: clusters
Abstract:
We present the combined analysis of the metal content of 83 objects in
the redshift range 0.09-1.39, and spatially-resolved in the 3 bins
(0-0.15, 0.15-0.4, >0.4)R500, as obtained with similar analysis
using XMM-Newton data in Leccardi & Molendi (2008A&A...487..461L 2008A&A...487..461L) and
Baldi et al. (2012A&A...537A.142B 2012A&A...537A.142B).
By combining these two large datasets, we investigate the relations
between abundance, temperature, radial position and redshift holding
in the Intra-Cluster Medium.
We fit functional forms to the combination of the different physical
quantities of interest, i.e. ICM metal abundance, radius, and
redshift. We use the pseudo-entropy ratio to separate the Cool-Core
(CC) cluster population, where the central gas density tends to be
relatively higher, cooler and more metal rich, from the Non-Cool-Core
systems.
Description:
The full dataset is available at
http://pico.bo.astro.it/settori/abun/xmm.dat and will be updated.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
xmm.dat 77 221 Full dataset of clusters of galaxies
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See also:
http://pico.bo.astro.it/settori/abun/xmm.dat : Updated full dataset
Byte-by-byte Description of file: xmm.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name Cluster name
17- 22 F6.4 --- z [0.09/1.4] Redshift
24- 28 F5.3 --- R0 [0/0.4] Inner-radius, fraction of R200
30- 34 F5.3 --- R1 [0.1/1] Outer-radius, fraction of R200
36- 41 F6.3 keV T [1.9/13] X-ray Temperature
43- 47 F5.3 keV e_T [0.05/4.3] Error on Temperature
49- 53 F5.3 --- Z [0/1] Metallicity with respect to Anders and
Grevesse 1989 (Geochim. Cosmochim. Acta, 53, 197)
55- 59 F5.3 --- e_Z [0.02/0.5] Error on Metallicity, lower value
at 1σ
61- 65 F5.3 --- E_Z [0.02/0.5] Error on Metallicity, upper value
at 1σ
67- 71 F5.3 --- sigma [0.27/1.22] Pseudo-Entropy-Ratio σ (1)
73- 77 F5.3 --- e_sigma [0.01/0.48] Error on Pseudo-Entropy-Ratio
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Note (1): the Pseudo-Entropy-Ratio is defined as
σ = (T0/T1).(EM0/EM1), where
T0 = temperature measured in the inner region r≤0.15R500
T1 = temperature measured in the outer region 0.15R500≤r≤0.4R500
EM0 = emission measure of the inner region
EM1 = emission measure of the outer region
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Acknowledgements:
Stefano Ettori, stefano.ettori(at)oabo.inaf.it
(End) Patricia Vannier [CDS] 29-Apr-2015