…De Vaucouleur found that the distribution of relatively bright galaxies in the celestial sphere is concentrated in a belt-like area, just like the Milky Way for stars, and by analogy with the Milky Way, he thought that the nearby galaxies around us form a finite spheroidal system (Figure 1 shows the distribution of bright galaxies in the celestial sphere). In 1882, Richard Brent Tully compiled distance data for about 2,200 galaxies based on the redshift values of their spectral lines, and from the spatial distribution of these galaxies, he confirmed the existence of the supergalaxy system (named the Local Supercluster by Tully) that de Vaucouleur had proposed, and clarified its three-dimensional structure. Figure 2 shows the galaxy density distribution map of the Local Supercluster that he obtained. The dense core is the Virgo cluster, where 20% of all galaxies are concentrated. … *Some of the terminology that mentions "Tully, RB" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…ド・ボークルールは比較的明るい銀河の天球分布が,ちょうど恒星の場合の天の川のように帯状の部分に集中していることを見いだし,天の川の類推から,われわれのまわりの近距離銀河が,回転楕円体状の有限な体系を作っているものと考えた(図1に明るい銀河の天球分布図を示す)。82年タリーRichard Brent Tullyは,約2200個の銀河について,スペクトル線の赤方偏移の値に基づく距離のデータをとりまとめ,これら諸銀河の空間分布から,ド・ボークルールの唱えた超銀河系(タリーの命名では局部超銀河団)の存在を確認し,その三次元構造を明らかにした。図2は彼が得た局部超銀河団の銀河密度分布図で,密度の高い中核部はおとめ座の銀河団であり,この部分に全銀河の20%が集中する。… ※「Tully,R.B.」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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