The solar-like "Second Spectrum" and the polarised metal lines in emission of the post-AGB binary 89 Herculis

F. Leone, M. Gangi, M. Giarrusso +6

We studied the polarised spectrum of the post-AGB binary system 89\,Herculis on the basis of data collected with the high resolution \emph{Catania Astrophysical Observatory Spectro…