Symbiotics stars

Recommended equipment : Star Analyser, Lhires III, eShel, Alpy, Lisa

Time : one night or a life time !

Summary

Symbiotic stars are interacting binary red giant & hot stars. The red giant loose material which is accreted by the hot star (main sequence star, white dwarf or neutron star). Outbursts occurs over the years which make them brighter and easier to record in spectroscopy.

Links

I would recommend the excellent web page from François Teyssier : http://www.astronomie-amateur.fr/Projets%20Spectro1%20SySt.html

While in french, the line identification, catalog, spectroscopic atlas and almost complete bibliography are easy to access in any language!

Interesting targets

• CI Cyg : eruption in summer 2010. See François Teyssier web page on CI Cyg.
• V407 Cyg : symbiotic nova.
• ARAS web page with all spectra available for download : http://astrosurf.com/aras/V407Cyg/v407cyg.htm
• Christian Buil page : http://astrosurf.com/buil/v407cyg/obs.htm
• François Teyssier page : http://www.astronomie-amateur.fr/feuilles/Spectroscopie/SyS/V407%20Cyg.html