NationMaster - Encyclopedia: Detached binary

Detached binaries are a kind of binary stars where each component is within its Roche lobe. The stars have no major effect on each other, and essentially evolve separately. Most binaries belong to this class, for example Sirius Binary star A binary star system consists of two stars both orbiting around their barycenter. ... The Roche lobe is the region of space around a star in a binary system within which orbiting material is gravitationally bound to that star. ... This article is about the star. ...

Categories: Astronomy | Binary stars

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Binary star - Wikipedia, the free encyclopedia (1194 words)
	A binary star is thus a pair of stars that are held together by the force of gravity.
	Binary stars may be found with any conceivable separation, from pairs orbiting so closely that they are practically in contact with each other, to pairs so distantly separated that their connection is indicated only by their common proper motion through space.
	In the case of a visual binary star, after the orbit has been determined and the stellar parallax of the system obtained, the combined mass of the two stars may be obtained by a direct application of the Keplerian harmonic law.

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