Coma Cluster of Galaxies

Japanese: かみのけ座銀河団 - かみのけざぎんがだん
Coma Cluster of Galaxies

...It was traditionally part of the constellation Virgo, but in 1602, T. Brahe established it as an independent constellation. It contains a large cluster of galaxies known as the Coma Cluster. It contains about 2,000 galaxies up to magnitude 15.5, has a diameter of 6 degrees, is about 20 million light years, and is 200 million light years away.

From [Galaxy Cluster]

...There is also a theory that this is due to interactions within galaxy clusters. The intergalactic space of galaxy clusters is filled with thin gas, and X-ray radiation from the high-temperature gas that is distributed so as to surround many galaxy clusters, including the Coma Cluster, has been observed. X-ray spectra indicate the presence of gas at 10 6 to 10 7 K that is thought to have a heavy element composition similar to or less than that of the material in the solar system. ...

*Some of the terminology that refers to the Coma Cluster of Galaxy is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…従来はおとめ座に属していたが,1602年T.ブラーエにより独立の星座としてとり上げられた。この星座には大銀河団があって,かみのけ座銀河団として知られている。15.5等までの銀河の数は約2000個,直径は6゜で約2000万光年,距離は2億光年である。…

【銀河団】より

…これも,銀河団中の相互作用に起因するとする説もある。銀河団の銀河間空間は希薄なガスで満たされていて,かみのけ座銀河団をはじめとする多くの銀河団について全体を包むように広がって分布する高温ガスからのX線放射が観測されている。X線スペクトルは,太陽系物質と同程度以下の重元素組成をもつと思われる106~107Kのガスの存在を示している。…

※「かみのけ座銀河団」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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