Spectre de P Cyg ou le revenant 9 mai 2024 (Luc Caron)

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Spectre de P Cyg ou le revenant 9 mai 2024

P Cyg est une étoile bleu géante variable (LBV). Elle est entourée d'un nuage de matière qu'elle a éjectée radialement et qui émet sous sa radiation une série de raies d'émission comprenant la série de Balmer Ha,Hb, Hy et Hd. Aussi toute une série de He I est visible ainsi que quelques raies de Si et Fe. C'est un spectre assez riche bien plaisant à analyser. Puisque c'est une étoile variable et qui a déjà eu quelques hoquets, je vais la visiter de temps à autre. Si T Crb se transforme en nova ce sera le genre de spectre que l'on pourrait enregistrer.

P Cyg is a blue giant variable (LBV) star. It is surrounded by a cloud of matter that it has ejected radially and which emits under its radiation a series of emission lines including the Balmer series Ha, Hb, Hy and Hd. Also a whole series of He I is visible as well as some lines of Si and Fe. It is a fairly rich spectrum which is very pleasant to analyze. Since it is a variable star and has already had a few hiccups, I will visit it from time to time. If T Crb goes nova it will be the kind of spectrum we could record.

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	Image of the day	Top pick	Top pick nominations	Total submitted
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Other
Unknown

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Spectre de P Cyg ou le revenant 9 mai 2024

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Spectre de P Cyg ou le revenant 9 mai 2024

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