The status of blue stragglers studies (I): formation mechanisms

Astronomy and Astrophysics – Astrophysics

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Astrophysics, Blue Straggler, Review, Formation, Close Binary System, Stellar Collision

Scientific paper

Observations and theoretical studies show that several different mechanisms should be responsible for the formation of Blue Stragglers (BSs). This is true even within a single composite system. Nowadays, some popular mechanisms for the formation of BSs are: mass transfer and coalescence in close binary systems; stellar interactions in dense environments; and stellar coalescence caused by stellar resonant interactions in binary-binary and binary-single star systems. Meanwhile, BSs could be found almost in all kinds of stellar systems. They play important role in the dynamical and chemical evolution of stellar systems, and have great influence on the integrated spectral properties of stellar systems. Blue stragglers are useful tracers for the study of binary populations, stellar content and stellar evolution in composite stellar systems.

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