HAT-P-32 Ab

HAT-P-32 Ab
Étoile
Nom HAT-P-32 A
Constellation Andromède[1]
Ascension droite 02h 04m 10,28s[2]
Déclinaison +46° 41′ 16,21″[2]
Type spectral F/G[1]

Localisation dans la constellation : Andromède

(Voir situation dans la constellation : Andromède)
Caractéristiques orbitales
Demi-grand axe (a) 0,034 26 ± 0,000 41  UA  [1]
Excentricité (e) ≤ 0,044  [1]
Période (P) 2,150 008 (± 1,2 × 10−7)  j  [1]
Inclinaison (i) 88,9 ± 0,4°  [1]
Caractéristiques physiques
Masse (m) 0,75 ± 0,13 MJ [1]
Rayon (R) 1,789 ± 0,025  RJ  [1]
Découverte
Méthode Transit[1]
Date 2011[1]
Statut confirmée[1],[3]

HAT-P-32 Ab[4],[5],[6], aussi désignée simplement HAT-P-32 b[1],[7],[8],[9],[10],[11],[12],[13],[14],[15] (en particulier avant la découverte de l'étoile HAT-P-32 B), est une exoplanète orbitant autour de HAT-P-32 A, l'étoile principale du système HAT-P-32. Elle a été découverte le par la méthode des transits[1]. Elle fait 0,75 fois la masse de Jupiter[1]. Son rayon en fait la plus grande exoplanète connue fin 2012[réf. nécessaire].

Découverte

Dès 2004, des observations par les télescopes du projet HATNet suggèrent la présence d'une exoplanète dans le système HAT-P-32. Cependant, la gigue importante dans le signal limite l'efficacité de la méthode habituelle utilisée pour traiter ces signaux ce qui rend difficile la confirmation de l'exoplanète[7].

Notes et références

  1. a b c d e f g h i j k l m et n (en) « Planet HAT-P-32 b », sur exoplanet.eu (consulté le ).
  2. a et b « Open Exoplanet Catalogue - HAT-P-32 », sur openexoplanetcatalogue.com, (consulté le ).
  3. (en-US)HAT-P-32 b sur NASA Exoplanet Archive
  4. Zhao et al. 2014.
  5. Tregloan-Reed et al. 2017.
  6. Alam et al. 2020.
  7. a et b Hartman et al. 2011
  8. Gibson et al. 2013.
  9. Seeliger et al. 2014.
  10. Nortmann et al. 2016.
  11. Mallonn et al. 2016.
  12. Mallonn et Strassmeier 2016.
  13. Damiano et al. 2017.
  14. Mallonn et Wakeford 2017.
  15. Wang et al. 2019.

Liens internes

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