A suggestion concerning the generation of the physical state of stellar mantles

Details A suggestion concerning the generation of the physical state of stellar mantles A suggestion concerning the generation of the physical state of stellar mantles

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...240l.153u&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 240, Sept. 15, 1980, p. L153-L156.

Astronomy and Astrophysics

Astronomy

12

B Stars, Early Stars, Stellar Atmospheres, Stellar Coronas, Stellar Structure, Supergiant Stars, Chromosphere, O Stars, Stellar Spectra, Stellar Winds, Ultraviolet Astronomy

Scientific paper

The physical state of the winds of B supergiants varies from one of a high level of ionization and rapid outflow to one of relatively low ionization and a moderate rate of outflow as one goes from type B0 to type A0. It is proposed here that this is the result of magnetodynamic energy being released in the mantles of these stars, much as occurs in the sun. Data are presented to show that this idea is plausible. It is noted that the release of magnetodynamic energy as the result of interaction between magnetic fields and differential motion in an inhomogeneous structure is probably the cause of the heating in all outer stellar atmospheres (mantles). In the late-type stars, the material in the mantle must first be ionized by the deposition of energy from acoustic waves; in the early-type stars, the material is already ionized at least once in the photosphere, as a result of the normal transfer of radiative energy, so no priming process is necessary for these stars.

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