Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...138...25l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 138, no. 1, Sept. 1984, p. 25-35.
Astronomy and Astrophysics
Astrophysics
24
Early Stars, Infrared Spectra, Radio Spectra, Stellar Mass Ejection, Stellar Winds, Stellar Coronas, Stellar Models, Stellar Spectra, Stellar Temperature, Temperature Distribution
Scientific paper
The effect of different temperature structures and of clumping and hot blobs in stellar winds on the infrared and radio excess is studied. It is shown that the presence of a corona can lead to either an increase or a decrease of the IR excess, depending on the theoretical depth of the corona. In the case of hot blobs or hot filaments, the excess flux may also be either higher or lower than in a comparable isothermal wind without clumping. The excess flux can be simply calculated from the predicted excess flux of homogeneous isothermal wind models by applying a correction factor to the optical depth scale and a correction factor to the source function. For a wind with hot and cold blobs of the same density, the excess flux is smaller than from a comparable star with a homogeneous wind with the same mass loss rate and velocity law.
Lamers Henny J. G. L. M.
Waters Laurens B. F. M.
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