期刊
ASTRONOMY & ASTROPHYSICS
卷 435, 期 1, 页码 L9-L12出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361:200500100
关键词
cosmology; galaxies : clusters; cosmic microwave background
In this Letter we derive the SZ effect (SZE) observable in the direction of the giant X-ray cavities found in the atmospheres of galaxy clusters. We explore specifically the case of the cluster MS0735.6+7421. The SZE produced in the cavities embedded in the cluster thermal atmosphere is of non-thermal nature: it dominates the overall cluster SZE at the frequency x(0,th) - at which the thermal SZE from the cluster vanishes - and appears, at sub-mm frequencies, as a negative SZE located only in the regions of the intracluster space occupied by the cavities. We show that SZ observations, combined with X-ray and radio data, are able to shed light on the morphology, on the physical structure, on the dynamics and the origin of these recently discovered non-thermal features of galaxy clusters. These studies will be also relevant to determine the impact of specific events of the nature of cavities on the use of SZ and X-ray clusters as probes for cosmology and for the large scale structure of the universe.
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