Some Constraints on Chromospheric Modelling for Solar-Type Stars with High S/n Spectra

Bibcode
1988IAUS..132..149F
Foing, B. H.; Castelli, F.; Vladilo, G.; Beckman, J.
Bibliographical reference

The Impact of Very High S/N Spectroscopy on Stellar Physics: Proceedings of the 132nd Symposium of the International Astronomical Union held in Paris, France, June 29-July 3, 1987. Edited by G. Cayrel de Strobel and Monique Spite. International Astronomical Union. Symposium no. 132, Kluwer Academic Publishers, Dordrecht., p.149

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0
1988
Number of authors
4
IAC number of authors
0
Citations
1
Refereed citations
1
Description
High signal to noise spectra are required in chromospheric modelling because chromospheric emission lines are formed in a boundary layer under conditions of NLTE and in non-hydrostatic equilibrium, as well as in multiple magnetically-controlled streams, with horizontal structure on several scales, and vertical velocity fields. To obtain useable estimates of energy dissipation with height the authors have obtained sequences of spectra from F8 to K5 and for stars of different activity levels. The authors outline the constraints such observations place on models and indicate theoretical and observational difficulties.
Type
Non-refereed

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