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Virial mass
In astronomy, the virial mass has different meanings depending on the context. In the context of dark matter halos of galaxies or galaxy clusters, virial mass refers to the mass within the virial radius , a radius within which a spherical "top hat" density perturbation destined to become a galaxy is collapsing. This radius is defined as where 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Virial mass」の詳細全文を読む
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