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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
X-ray spectroscopy of the Virgo Cluster out to the virial radius
Original language description
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 < r < rvir, the best-fitting temperature drops by roughly 60 per cent. Within a radius r <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.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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