Results 131 to 140 of about 146,288 (166)
Science, 1966 Besides being of intrinsic interest, these outer stellar envelopes provide very useful astrophysical tools.
O C Wilson
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Stellar Model Chromospheres and Spectroscopic Diagnostics
Annual Review of Astronomy and Astrophysics, 2017 The discovery of exoplanets and the desire to understand their atmospheric chemical composition and habitability provides a new rationale for understanding the radiation from X-rays to radio wavelengths emitted by their host stars. Semiempirical models of stellar atmospheres that include accurate treatment of radiative transfer of all important atoms ...
Jeffrey Linsky
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A phenomenological interpretation of stellar chromospheres
Astrophysics and Space Science, 1986An attempt is made to develop a phenomenological interpretation of stellar chromospheres. The following problems are examined: observed emission powers of ‘magnesium’ chromospheres on stars based on the ultraviolet doublet, 2800 Mgii, observations; dependence of chromosphere emission on spectral and luminosity classes; stellar chromospheres as an ...
G A Gurzadyan
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Stellar chromospheres and coronae
Astrophysical Journal, 1981 The basic structural features of the solar chromosphere and corona are identified either with physical properties of the plasma or with properties of the energy input. It is argued that those properties identified with plasma physics should be relatively invariant whereas those identified with the energy input should vary from star to star.
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Stellar Convection Zones, Chromospheres, and Rotation
Astrophysical Journal, 1966 O C Wilson
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Stellar model chromospheres. IX - Chromospheric activity in dwarf stars
Astrophysical Journal, 1979 High-resolution Ca II K line profiles are used to model the upper photospheres and lower chromospheres of eight main-sequence stars ranging in spectral type from F0 to M0 and exhibiting different degrees of chromospheric activity. The model chromospheres are studied as a function of spectral type and activity for stars of similar spectral type in order
S P Worden, J L Linsky
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Heating of Stellar Chromospheres by Shock Waves.
Astrophysical Journal, 1960 Ray Weymann
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Detection of mass loss in stellar chromospheres
Astrophysical Journal, 1980 IUE observations of 47 cool giants have been made in a search for the onset of expansion in the Mg II h and k emission cores. It is found that, in a statistical sense, the longward emission peak becomes dominant above a velocity dividing line in the H-R diagram, which lies close to a temperature dividing line reported by Linsky and Haisch (1979).
D J Mullan, R E Stencel
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PREDICTED ULTRAVIOLET SPECTRA FROM STELLAR CHROMOSPHERES
Journal of Quantitative Spectroscopy and Radiative Transfer, 1968Abstract Perhaps the most tangible evidence of the existence and structure of postulated stellar chromospheres of otherwise relatively cool stars would be the detection of an intense ultraviolet spectrum. The solar case for which a variety of measurements is available now reveals that the observed spectrum depends in a very complex and not thoroughly
L. Oster, N.P. Patterson
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