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An illustration of bow shock


An illustration of bow shock. Discontinuity of density and pressure of the matter appears at the boundary where the stellar wind from Betelgeuse collides into the interstellar matter. Betelgeuse moves in the space from lower right to upper left in this figure.

Results: AKARI Highlights I: A supergiant making a splash in a cosmic river – AKARI revealed the shock wave at the interface between stellar wind and interstellar matters –