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Sagittarius Stream : ウィキペディア英語版 | Sagittarius Stream In Astronomy, the Sagittarius Stream is a long, complex, structure made of stars that wrap around the Milky Way galaxy in an almost polar orbit. It consists of tidally stripped stars from the Sagittarius Dwarf Elliptical Galaxy resulting from the process of merging with the Milky Way over a period of billions of years. ==Discovery== This stellar stream was originally proposed in 1995 by Donald Lynden-Bell after analyzing the distribution of globular clusters in the Milky Way. The actual structure was identified by Newberg et al. (2002)〔(The Ghost of Sagittarius and Lumps in the Halo of the Milky Way )〕 and Majewski et al. (2003)〔(A Two Micron All Sky Survey View of the Sagittarius Dwarf Galaxy. I. Morphology of the Sagittarius Core and Tidal Arms )〕 using data from the 2MASS and SDSS surveys. In 2006, Belokurov and his collaborators〔(The Field of Streams: Sagittarius and Its Siblings )〕 found that the Sagittarius Stream has two branches.
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「Sagittarius Stream」の詳細全文を読む
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