THE DISTRIBUTION OF BARYON MATTER IN THE NEARBY X-RAY GALAXY CLUSTERS
We present the results on the distribution of baryon matter in the galaxy clusters (z < 0.2), based on the Chandra X-ray Observatory data. The observed surface brightness profiles were approximated by β- model, which provides a good fit for all clusters. We found a correlation between cluster...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Odessa I. I. Mechnykov National University
2012-11-01
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| Series: | Odessa Astronomical Publications |
| Online Access: | http://oap.onu.edu.ua/article/view/83328 |
| Summary: | We present the results on the distribution of baryon matter in the galaxy clusters (z < 0.2), based on the Chandra X-ray Observatory data. The observed surface brightness profiles were approximated by β- model, which provides a good fit for all clusters. We found a correlation between cluster's radius R200 and temperature T , taking into account that their measurements are statistically independent because of the mass of gas is almost independent on cluster's temperature: R200 = 850 kpc x T 0.61±0.04 keV. We obtained an empirical relation for a total mass of baryon matter (intercluster medium and galaxies), and the upper limit (25-30%) on its changes in a total mass of nearby X-ray galaxy clusters. |
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| ISSN: | 1810-4215 |