Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...121..286r&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 121, no. 2, May 1983, p. 286-290. Research supported by the Nationale Fonds vo
Astronomy and Astrophysics
Astrophysics
O Stars, Radiation Pressure, Stellar Coronas, Stellar Evolution, Stellar Mass Ejection, Stellar Models, Stellar Winds, Conservation Laws, Differential Equations, Stellar Atmospheres, Stellar Temperature, Wind Velocity
Scientific paper
Atmospheric models are presented for the outer layers of hot stars, O and Of stars. The processes included are radiation pressure, deposition of energy generated in the lower atmosphere, and radiation cooling. In this way coronal layers with temperatures of the order of several million K are generated, with an extent of 1-2 stellar radii, and with mass loss rates and stellar wind velocities of the same order of magnitude as observed. Winds are computed for stars throughout the blue part of the HRD. The computations indicate that the mass loss rates increase as a star evolves. The mass loss rate and the velocity structure are determined by the radiation pressure, while the temperature structure is a consequence of the form of the energy deposition.
de Loore Camiel
Olson G.
Robbrecht W.
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