Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979qjras..20..361g&link_type=abstract
Royal Astronomical Society, Quarterly Journal, vol. 20, Dec. 1979, p. 361-382.
Astronomy and Astrophysics
Astronomy
83
Hertzsprung-Russell Diagram, Late Stars, Reaction Kinetics, Stellar Mass Ejection, Giant Stars, Mass Flow Rate, Stellar Coronas, Stellar Evolution, Stellar Structure, Stellar Winds, Supergiant Stars
Scientific paper
Observational and theoretical evidence for mass loss from various types of stars are summarized, and mechanisms for its generation are described, including shock waves, thermally driven winds, and radiation-driven winds with laminar flow. In particular, spectroscopic observations of Alpha Orionis are reported, and the K I, Ca II, and H I lines show that its atmosphere is divided into at least three zones: a photosphere fluctuating in both brightness and radial velocity, an expanding chromosphere hot enough (temperature on the order of 1000 K) to emit strong Balmer-line radiation and uncoupled from motions in the photosphere, and a cold, distant circumstellar shell. Furthermore, the 5.781 yr period for the mean radial velocity variation of the photosphere is found to be correct to within about 0.5%, and the flow of matter away from the star appears to begin in the chromosphere, where it is accelerated to about 50% of its terminal value.
No associations
LandOfFree
Some problems connected with mass loss in late-type stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Some problems connected with mass loss in late-type stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Some problems connected with mass loss in late-type stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1450185