Dramatic change of H alpha profile

[Christian Buil]

Global display of some recent spectra of CH Cyg taken with VHIRES-MO (R=50000) and a 8-inch telescope:

Date: 24.099 / 04 / 2015


Date: 31.081/ 04 / 2015


Date: 4.922 / 04 / 2015 (stack of only 4x600 sec. short for VHIRES)


Date: 5.971 / 04 / 2015 (bad weather)


(note change in He5876 line)

Detail of 6300 A OI line (RV not corrected):






Christian Buil

[Tim Lester]

After posting my animation for the night of June 4th I was worried that possibly the variations were just noise.
To check this I grouped them into 9 4x300 sec spectra to reduce noise and plotted an overlay. Same normalization as before (6600A - 6620A).
It still looks like the complex Ha line may be varying a small amount all the time on a relatively short time scale.

Ch_Cyg_series.png (9.14 KiB) Viewed 10424 times

Tim

[Jacques Montier]

Hello,

Low resolution spectrum of CH Cyg with Alpy 600

20150607_chcyg.png (77.34 KiB) Viewed 10457 times

Hight resolution spectrum (Halpha line) with LhiresIII 2400 t/mm

20150607_chcyg_lhires.png (50.52 KiB) Viewed 10457 times

Best regards,

[umberto sollecchia]

Bonsoir à tous,voici mon animation où il y avait un effet significatif P-cyg sur le H-bêta de heures 2,35 à 2,43 TU.

@15-06-2015.gif (733.27 KiB) Viewed 10353 times

Range H-beta

ch_cyg_hbeta.gif (1.21 MiB) Viewed 10353 times

Cordialement Umberto

[Jacques Montier]

Hi all,

CH Cyg profile with Alpy600 on 2015/06/17

20150617_CHCyg_line.png (52.76 KiB) Viewed 10315 times

Cheers,

[umberto sollecchia]

Salut, je l'ai enregistré un nouvel effet de P-Cyg sur le H-bêta avec une observation dans la nuit du 17 et 18/06/2015 à partir de 22:55 heures à 00:07 heures TU, voici le film.

@17-06-2015.gif (317.67 KiB) Viewed 10287 times

@CH Cyg H-beta.gif (317.67 KiB) Viewed 10285 times

Cordialement Umberto

[Olivier GARDE]

Fast changes in the spectrum of CH Cyg last night in just 1 hour?

Some animations of 12 spectra of 300s each with eshel spectrograph and RC400 astrosib.

Variation for H Alpha


Variation for H beta


Variation for HeI


Variation of some line on 45 order

[Joan Guarro Flo]

Molto buono lavoro, Umberto.

Très bon travail, Olivier.

Félicitations, Congratulazioni,

Joan.

[Francois Teyssier]

Excellent Olivier !
Tu est tombé sur le bon moment.
Je mets la base à jour cette semaine
Amicalement,
François

[Olivier GARDE]

Last night I took about 5 hours of spectra for CH Cyg (180s unit exposure) and a total of more than hundred spectra, but I haven't see any fast change, just some ondulation for the blue part of Halpha.



Olivier