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Dynamic atmospheres and winds of cool luminous giants
Astronomy and Astrophysics
High spatial resolution techniques have given valuable insights into the mass loss mechanism of AGB stars, which presumably involves a combination of atmospheric levitation by pulsation-induced shock waves and radiation pressure on dust. Observations indicate that Al_2O_3 condenses at distances of about 2 stellar radii or less, prior to the formation of silicates. Al_2O_3 grains are therefore prime candidates for producing the scattered light observed in the close vicinity of several M-type AGBdoi:10.1051/0004-6361/201628424 fatcat:ib4hcai5uffplay27ehc3e2xwu