Abstract
Abstract A high-mass star contains more than about eight solar masses of material. Regions where such stars form differ significantly from those in which only low-mass stars form. High-mass stars are thought to be born in clumps that are magnetically supercritical, whereas clumps in which only low-mass stars appear are probably magnetically subcritical (cf. section 5.3). High-mass stars have more powerful winds than low-mass stars and they evolve into supernovae; consequently they affect much larger volumes of the environments surrounding them. Low-mass stars emit negligible amounts of ultraviolet radiation during their youth and main-sequence phases, whereas high-mass stars ionize large amounts of material and drive motions with the ultraviolet radiation that they emit.
Published Version
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