Sheliak 10 mai 2022 (Luc Caron)

Sheliak 10 mai 2022

Link: https://groupecoamnd.wixsite.com/coamnd/luc-caron

Sheliak 10 mai 2022

Link: https://groupecoamnd.wixsite.com/coamnd/luc-caron

Mon spectre de Sheliak pris hier soir. On distingue très bien les deux raies d'émission en H-a et H-b.
Cela s'explique par un échange de matière entre les deux étoiles de cette binaire (en fait il y aurait 4 étoiles en tout) qui sont assez proches l'une de l'autre. Cela crée, dans le cas de Sheliak, un disque d'accrétion autour de la partenaire et l'éjection de matière sous forme de jets le long de son axe de rotation créant ces raies d'émissions.

Ces raies sont facilement détectables sur le spectre original lors de l'acquisition. Avec mon système Alpy et le réfracteur 73 mm, j'ai besoin de 60 sec d'exposition par spectre. Ici j'ai pris 30 x 60 sec pour faire mon spectre. Vraiment, avec la spectro on ne voit plus les étoiles de la même façon.

My spectrum of Sheliak taken last night. The two emission lines at H-a and H-b can be clearly distinguished.
This is explained by an exchange of matter between the two stars of this binary (in fact there would be 4 stars in all) which are quite close to each other. This creates, in the case of Sheliak, an accretion disk around the partner and the ejection of matter in the form of jets along its axis of rotation creating these emission lines.

These lines are easily detectable on the original spectrum during acquisition. With my Alpy system and the 73 mm refractor, I need 60 sec of exposure per spectrum. Here I took 30 x 60 sec to do my spectrum. Really, with the spectro we no longer see the stars in the same way.

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Status	Basic failed
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Astrometry.net job	5759622
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Sheliak 10 mai 2022

Sheliak 10 mai 2022

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Sheliak 10 mai 2022

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