Identification of lines
in Symbiotic Stars
Classical symbiotic stars
CH Cygni
CH Cyg is a peculiar symbiotic star.
The emission spectrum strongly varies with the activity. Until the 60', CH Cygni was a reference as classical M giant!
The hot component is probably an accretion disk. The ionization degree is low for a symbiotic (T* ~ 50 000 K)
The emission spectrum shows Balmer lines, [OI] and [OIII] (strongly dependent of the activity of the hot component, [N II] and number of metal lines (mainly Fe, but also Ti, Cr ..., neutral or singly ionised, recombination or collisionnally excited lines)List of emission lines from Yoo, 2010
RR Tel
RR Tel is a symbiotic nova which exhibits many emission lines.
The list of lines published by Crawford+ ( 1999)
Number of lines: 793
Range: 3600 - 9230 angströms can be used for lines identification in classical novae and symbiotic stars
References
http://articles.adsabs.harvard.edu/pdf/1977MmRAS..83....1T
RS Oph, recurrent symbiotic nova
Compilation of lines from various publications + additional lines observed in ARAS spectra during the 2021 outburst
Note: this list must be considered as a working document.
Some identifications can be subject to debateNumber of lines: 203
Range: 3388- 8662 angströms
References
http://articles.adsabs.harvard.edu/pdf/1977MmRAS..83....1T
R
Publications
The enhanced spectrum of the symbiotic variable star CH Cygni on November 2, 2006
Yoo, Kye Hwa
New Astronomy, Volume 15, Issue 2, p. 215-226
http://adsabs.harvard.edu/abs/2010NewA...15..215Y
Summary
1. Cool component - Spectral type - Wind
2. Hot component - Accretion - Steady burning - Accretion disk
3. Orbital elements
4. Excitation level
5. Emission Lines - Formation - Identification - Diagnostic from lines
6. Outbursts
7. Symbiotic Miras
8. Symbiotic novae
9. Recurrent Novae (Symbiotics)
10. List of bright symbiotic stars
11. News
12. Recent publications