V335 Vul

[Francois Teyssier]

Poalo Berardi has obtained a spectrum of V335 Vul at medium resolution (R = 5000)

V335Vul.PNG (21.13 KiB) Viewed 7258 times

V335 is suspected symbiotic in Belczinski & al. catalog
The Ha line is very narrow for a symbiotic (67 km/s in Paolo's spectrum)
The red giant is a carbon star
Mag ~ 11.8

A low resolution spectrum should be welcome in the next Information letter



François

[Joan Guarro Flo]

To all :

This graph of V335 Vul, complemented the observation of Paolo.

Regards, Joan.

[Francisco Campos]

Hello,

here is my contribution, taken the last night.

Joan, you observed at the same time as me. Quina casualitat!

_v335vul_20160822_851.png (9.28 KiB) Viewed 7207 times

Greetings
Fran

[Francois Teyssier]

Thank you Joan and Fran
It will be interesting to compare the instrumental response

Comments of Belczinski & al. in their Catalog of Symbiotics :
V335 Vul Suspected in [225]: presence of carbon giant and optical emission-line spectrum (H i) displaying hot continuum in blue. We agree with this classification although this object might be a single pulsating star: (i) the carbon star might pulsate with period of 342 days [55]and then emission lines behave as for a Mira variable – they disappear near minimum light and show up again at maximum (see spectra in [225]); (ii) Hα is very narrow:
2˚A (90 km s−1) and for a symbiotic star we would expect a width of about 300–500 km s−1; (iii) the Balmer decrement is different than that observed for symbiotic stars (it resembles that of Mira variable), although the authors of [225] claim that the Balmer decrement resembles that of a symbiotic star.

[225} = Munari, U., Tomov, T., Rejkuba, M., 1998, Inf. Bull. Variable Stars 4668
See also : Dahlmark, L., 1994, J. Am. Assoc. Variable Star Obs. 23, 34 for the period

François

[Francois Teyssier]

Pas mal !

V335Vul.PNG (16.82 KiB) Viewed 7197 times

Bonne continuation,

François

[Joan Guarro Flo]

CONGRATULATIONS, Fran !!

(Una mica més i ens cau el pèl ), Joan.

[Olivier Thizy]

Hello,,


to have some fun and push my equipment I did 4h15min on V335 Vul tonight. Not all individual spectra are ok but the outcome is still nice with lot of details and an overall shape which looks like the one published here before.

Here is:
-the spectrum from 5000A (below it is very noisy, maybe I should I go to Hbeta...
-a zoom on Halpha and above, this start beeing very red.
-the astrometry on my guiding image
-the overall screen of the PC observatory during the acquisitions...

Capture V335 Vul astrometry ok.JPG (83.9 KiB) Viewed 7176 times

Cordialement,
Olivier Thizy

[Joan Guarro Flo]

Il est un bon document, Olivier !
Tu sais, ce observer la V335 Vul est pas facile.
Joan.