Chromospheric modelling in late-type dwarfs. I - Quiescent objects

Details Chromospheric modelling in late-type dwarfs. I - Quiescent objects Chromospheric modelling in late-type dwarfs. I - Quiescent objects

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984msngr..38...24b&link_type=abstract

ESO Messenger (ISSN 0722-6691), Dec. 1984, p. 24-28.

Astronomy and Astrophysics

Astronomy

4

Chromosphere, Dwarf Stars, Late Stars, Stellar Models, Abundance, Emission Spectra, High Resolution, Line Shape, Spaceborne Astronomy, Spectral Resolution, Stellar Temperature, Temperature Distribution

Scientific paper

Attention is given to problems which arise when an attempt is made to use observational material to clarify the mechanisms responsible for the heating of the chromosphere in a late-type star, in order to derive a clearer physical view of the nature of a chromosphere, its relation to the underlying photosphere, and the overlying corona. Problems arise in the prediction of line shapes by means of simple models, in chromospheric inhomogeneities, in two-stream modeling, and in the coexistence of two temperature structures. It is deemed necessary to take the dominant role played by inhomogeneities into account, and to ensure that any interstellar effects in the line profile data are well and truly eliminated.

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