Relations of X-ray properties of 150 galaxy clusters observed with ASCA

被引：0
|
作者：
Akimoto, F [1 ]
Furuzawa, A [1 ]
Yamashita, K [1 ]
Tawara, Y [1 ]
机构：
[1] Nagoya Univ, Dept Phys, Chikusa Ku, Nagoya, Aichi 464, Japan
来源：
NEW CENTURY OF X-RAY ASTRONOMY | 2001年 / 251卷
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D O I：
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
150 clusters of galaxies observed with ASCA (including group of galaxies 20%, binary galaxies a few %, galaxy 10%) are analyzed, using common manner to minimize systematic deviation due to instrumental characteristics. Obtained correlation between X-ray luminosity and temperature (Lx-kT) enables us to discuss formation and evolution of a gravitationally bounded system above 10(12)M.. The slope of this relation becomes steeper below 3keV. It is because the gas fraction f(gas) is smaller than that of a large system. It can be described that a small system is much affected by preheating. However obtained correlation between central entropy S-0 and kT shows no sign of the preheating.
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页码：436 / 437
页数：2
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