A uniform metallicity in the outskirts of massive, nearby galaxy clusters

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F17%3A00099812" target="_blank" >RIV/00216224:14310/17:00099812 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1093/mnras/stx1542" target="_blank" >http://dx.doi.org/10.1093/mnras/stx1542</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stx1542" target="_blank" >10.1093/mnras/stx1542</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A uniform metallicity in the outskirts of massive, nearby galaxy clusters

Popis výsledku v původním jazyce

Suzaku measurements of a homogeneous metal distribution of Z similar to 0.3 Solar in the outskirts of the nearby Perseus cluster suggest that chemical elements were deposited and mixed into the intergalactic medium before clusters formed, likely over 10 billion years ago. A key prediction of this early enrichment scenario is that the intracluster medium in all massive clusters should be uniformly enriched to a similar level. Here, we confirm this prediction by determining the iron abundances in the outskirts (r &gt; 0.25r(200)) of a sample of 10 other nearby galaxy clusters observed with Suzaku for which robust measurements based on the Fe-K lines can be made. Across our sample, the iron abundances are consistent with a constant value, Z(Fe) = 0.316 +/- 0.012 Solar (chi(2) = 28.85 for 25 degrees of freedom). This is remarkably similar to the measurements for the Perseus cluster of Z(Fe) = 0.314 +/- 0.012 Solar, using the Solar abundance scale of Asplund et al.

Název v anglickém jazyce

A uniform metallicity in the outskirts of massive, nearby galaxy clusters

Popis výsledku anglicky

Suzaku measurements of a homogeneous metal distribution of Z similar to 0.3 Solar in the outskirts of the nearby Perseus cluster suggest that chemical elements were deposited and mixed into the intergalactic medium before clusters formed, likely over 10 billion years ago. A key prediction of this early enrichment scenario is that the intracluster medium in all massive clusters should be uniformly enriched to a similar level. Here, we confirm this prediction by determining the iron abundances in the outskirts (r &gt; 0.25r(200)) of a sample of 10 other nearby galaxy clusters observed with Suzaku for which robust measurements based on the Fe-K lines can be made. Across our sample, the iron abundances are consistent with a constant value, Z(Fe) = 0.316 +/- 0.012 Solar (chi(2) = 28.85 for 25 degrees of freedom). This is remarkably similar to the measurements for the Perseus cluster of Z(Fe) = 0.314 +/- 0.012 Solar, using the Solar abundance scale of Asplund et al.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

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Svazek periodika

470

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

17

Strana od-do

4583-4599

Kód UT WoS článku

000408207600058

EID výsledku v databázi Scopus

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