X-ray spectroscopy of the Virgo Cluster out to the virial radius

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F11%3A00059009" target="_blank" >RIV/00216224:14310/11:00059009 - isvavai.cz</a>

Výsledek na webu

<a href="http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2966.2011.18526.x/pdf" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2966.2011.18526.x/pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/j.1365-2966.2011.18526.x" target="_blank" >10.1111/j.1365-2966.2011.18526.x</a>

Jazyk výsledku

angličtina

Název v původním jazyce

X-ray spectroscopy of the Virgo Cluster out to the virial radius

Popis výsledku v původním jazyce

We present results from the analysis of a mosaic of 13 XMM-Newton pointings covering the Virgo Cluster from its centre northwards out to a radius r=1.2 Mpc (4.5deg), reaching the virial radius and beyond. This is the first time that the properties of a modestly sized (Mvir=1.4x1014 Mo, kT=2.3 keV), dynamically young cluster have been studied out to the virial radius. The density profile of the cluster can be described by a surprisingly shallow power-law ne r-beta with index beta= 1.21 pm 0.12. In the radial range of 0.3rvir &lt; r &lt; rvir, the best-fitting temperature drops by roughly 60 per cent. Within a radius r &lt;450 kpc, the entropy profile has an approximate power law form K r1.1, as expected for gravitationally collapsed gas in hydrostatic equilibrium. Beyond r=450 kpc, however, the temperature and metallicity drop abruptly, and the entropy profile becomes flatter, staying consistently below the expected value by a factor of 2-2.5.

Název v anglickém jazyce

X-ray spectroscopy of the Virgo Cluster out to the virial radius

Popis výsledku anglicky

We present results from the analysis of a mosaic of 13 XMM-Newton pointings covering the Virgo Cluster from its centre northwards out to a radius r=1.2 Mpc (4.5deg), reaching the virial radius and beyond. This is the first time that the properties of a modestly sized (Mvir=1.4x1014 Mo, kT=2.3 keV), dynamically young cluster have been studied out to the virial radius. The density profile of the cluster can be described by a surprisingly shallow power-law ne r-beta with index beta= 1.21 pm 0.12. In the radial range of 0.3rvir &lt; r &lt; rvir, the best-fitting temperature drops by roughly 60 per cent. Within a radius r &lt;450 kpc, the entropy profile has an approximate power law form K r1.1, as expected for gravitationally collapsed gas in hydrostatic equilibrium. Beyond r=450 kpc, however, the temperature and metallicity drop abruptly, and the entropy profile becomes flatter, staying consistently below the expected value by a factor of 2-2.5.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2011

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

—

Svazek periodika

414

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

2101-2111

Kód UT WoS článku

000292977600022

EID výsledku v databázi Scopus

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