PU Vulpecula with many emission lines - 27Aug17

[James Foster]

As part of the efforts to acquire spectra of lesser observed objects, I acquired this spectrum of PU Vulpecula on 27Aug17
from my high altitude/dark sky site at Mt. Pinos, CA:



While looking at the 2D image of the spectrum, this objects had so many emission spikes I thoughts it could be a nova; see 2D image after Isis V1.90 processing:



According to the Kyoto cataclysmic stellar data base, this is a Z Andromeda (or Z And/NC) type, trinary system whose main components are a set
of A4II-F8Iab+M6IIIe stars. Its well placed for observation, near +22 declination. I'll definitely add this to my regular photometry/spectra target list.

James

[Francois Teyssier]

Excellent, the LISA is well tuned
and correct identitification of the lines. You have also the second Raman OVI at ~ 7080.
On such a spectrum, you can estimate the electronic temperature from [OIII] lines

Yes, it a symbiotic star and more precisely a symbiotic nova (1979)
Very long plateau maximum ~ 8 years before decline and a deep eclispe just after the outburst

PUVul.PNG (5.17 KiB) Viewed 3233 times

The reference catalog for symbiotics is
https://aas.aanda.org/articles/aas/pdf/ ... /h2255.pdf
A little bit old (2000) but still very usefull

The composition of the system is still subject of discussion


François