Hvězda typu Alfa Cygni

Hvězdy typu Alfa Cygni jsou proměnné hvězdy, které vykazují neradiální pulzaci, což znamená že některé části povrchu hvězdy se smršťují a ve stejném okamžiku se jiné části povrchu rozpínají.[1] Tyto hvězdy jsou veleobry spektrální třídy B nebo A. Velikosti změn jasnosti jsou kolem 0,1m. Periody pulzací jsou od několika dnů do několika týdnů.

Prototyp těchto hvězd, Deneb (alfa Cygni) mění svou jasnost v rozmezí 1,21m až 1,29m.

Reference

V tomto článku byl použit překlad textu z článku Alpha Cygni variable na anglické Wikipedii.

  1. ↑ Nonradial Pulsation [online]. Universität Wien [cit. 2010-02-22]. Dostupné online. 
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