Nébuleuse australe du Crabe

Henize 2-104
Image illustrative de l’article Nébuleuse australe du Crabe
Données d’observation
(Époque J2000.0)
Constellation Centaure
Ascension droite (α) 14h 11m 52,06s[1]
Déclinaison (δ) −51° 26′ 24,1″ [1]

Localisation dans la constellation : Centaure

(Voir situation dans la constellation : Centaure)
Astrométrie
Distance 14 500 al[2]
(4 445,7 pc)
Caractéristiques physiques
Type d'objet Nébuleuse
Liste des nébuleuses

La nébuleuse australe du Crabe, désignée par Henize 2-104 (abrégé en Hen 2-104), est une nébuleuse située dans la constellation du Centaure à environ 4 450 pc (∼14 500 al) du Système solaire. Cette structure est générée par une étoile binaire, plus précisément une étoile symbiotique formée d'une géante rouge variable de type Mira et d'une naine blanche.

Formation

Selon une étude publiée au début du XXIe siècle[2], les deux jets et les deux lobes du sablier extérieur proviendraient de la naine blanche tandis que le sablier intérieur serait généré par le vent stellaire de la géante rouge.

Dénomination

La dénomination Henize 2-104 fait référence à Karl G. Henize, un astronome américain (et astronaute de la NASA à bord d'Apollo 15 et du Skylab) qui étudia, entre autres, les nébuleuses planétaires.

Galerie

Liens externes

Notes et références

  1. a et b (en) Nébuleuse australe du Crabe sur la base de données Simbad du Centre de données astronomiques de Strasbourg.
  2. a et b (en) Romano L. M. Corradi, Mario Livio, Bruce Balick, Ulisse Munari et Hugo E. Schwarz, « The Southern Crab from a New Perspective », The Astrophysical Journal, vol. 553, no 1,‎ , p. 211-218 (lire en ligne) DOI 10.1086/320665
  3. (en) HubbleSite – 24 août 1999 « The Center of the Southern Crab Nebula He2-104 ».
  4. (en) HubbleSite – 24 août 1999 « Symbiotic Star Blows Bubbles into Space »

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