Skip to main content

COMPOSITE - SPECTRUM BINARY STARS

Objective



Eclipsing binary stars are to be observed during their total and chromospheric eclipses, when the small, hot companion serves as a light probe for the chromosphere of the cool giant primary. New techniques are used to isolate the transient chromospheric features from the complex composite spectrum. In particular, a sequence of observations will resolve the chromospheric features spatially - the only possibility for such an achievement for any star other than the Sun. Computer modelling yields the distribution of densities, electron temperatures, excitation, etc.. with height. Improved knowledge about the transition from cool winds to hot coronae and new constraints to theoretical wind acceleration theory, will be achieved.

Coordinator

THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF CAMBRIDGE
Address
Trinity Lane, The Old Schools,
CB2 1TN Cambridge
United Kingdom

Participants (1)

UNIVERSITY OF HAMBURG
Germany
Address
Moorweidenstrasse, 18
20148 Hamburg