Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978sciam.239...44w&link_type=abstract
Scientific American, vol. 239, Aug. 1978, p. 44-53.
Astronomy and Astrophysics
Astrophysics
1
Stellar Mass Ejection, Stellar Winds, Absorption Spectra, Astronomical Spectroscopy, Astrophysics, Cool Stars, Eclipsing Binary Stars, Infrared Astronomy, Radiation Pressure, Red Giant Stars, Solar Wind, Stellar Envelopes, Stellar Evolution, Supergiant Stars, Ultraviolet Astronomy
Scientific paper
Almost every kind of star, including the sun, is ejecting significant amounts of matter into space, sometimes in sporadic violent outbursts and at other times in a slow, steady stream. An understanding of these processes is important for a number of reasons, related to the effects of the loss of matter on the evolution of the star, questions regarding the enrichment or depletion of gas in the Galaxy, and the study of the physical processes which take place in the outer layers of stars. Attention is given to the halo of gas surrounding the red-supergiant star Alpha Orionis, massive stellar winds which flow from the surface of the red supergiants in the Alpha Herculis multiple-star system, the effect of stellar dust on the spectral energy distribution of two comparatively cool stars, and spectral profiles of the outflowing gas from the star Tau Scorpii.
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