Symbiotic stars: AG Dra, CI Cyg, ZZ CMi

[Peter Somogyi]

AG Dra:

Lines identified via VSpec, but I could just guess whether the one around 5015 is He (my choice) or Fe.
Calibration was very hard because noticed I've put in the Neon only (used 8 lines, RMS=0.08773, order=2). Won't do next time.

CI Cyg - I was curious how the Fe lines look in green:

But I was unable to identify the 2nd line from the left.

ZZ CMi from earlier last week:

H-alpha looks to be split.

Cheers,
Peter

[Peter Somogyi]

ZZ CMi: H-alpha shrinked, no split at this resolution anymore:

AG Dra has not changed much (small increase of Ha and He lines):

T CrB - small Ha-shape change:

Peter

[Joan Guarro Flo]

Hi:

AG Dra of the last night.

Regards, J.Guarro.

[Francois Teyssier]

AG Dra:

Lines identified via VSpec, but I could just guess whether the one around 5015 is He (my choice) or Fe.

Peter,

Fe II, multiplet 42, always appears with 3 lines : 4924, 5018, 5169
In the absence of emission near 5169, your He I identication is good.


Cheers,
François

[Francois Teyssier]

Peter said "ZZ CMi: H-alpha shrinked"

Confirmed in these eshel spectra :

zzcmi_20150325_20150413.png (33.54 KiB) Viewed 7518 times

(Significant improvement of the SNR)

François

[Francois Teyssier]

Peter, should you be kind enough for sharing your gnu file ?
The crop on H alpha is very nice

Cheers,

François

[Peter Somogyi]

I am sorry Francois, the Ha-crop is not scripted, just used simple 'paint' tool of windows 7 for now, cut & paste from a magnified double plot from ISIS, scaled Y minimum from 0.5 to get wav.scale axis closer. Not familiar with scripting ISIS yet, maybe with time.

At your resolution now I'd rather think that Ha emission of the star was just simply decreased, and a constant absorption nebula just absorbing the Ha - some hydrogen cloud around the star, or is there a deep sky nebula between us, maybe.

By the way, thank you for the elaboration on AG Dra!

Peter

[Peter Somogyi]

But something I don't understand: the Ha "absorption" part is "widening", it's not a simple straight one... Explanation needed!

[Peter Somogyi]

First try of the 2400/mm with the LHires.

ZZ CMi (good SNR, spkies are not noise):

AG Dra, Ha and Raman region, scaled to the same max value:

Cheers,
Peter