HATS-5 b

Cet article est une ébauche concernant une exoplanète.

Vous pouvez partager vos connaissances en l’améliorant (comment ?) selon les recommandations des projets correspondants.

HATS-5 b est une planète extrasolaire (exoplanète) confirmée en orbite autour de HATS-5, une étoile de type spectral G, âgée d'environ 3,6 milliards d'années et située à une distance d'environ 257 ± 8 parsecs du Soleil, dans la direction de la constellation australe de l'Éridan[1].

Sa découverte par la méthode des transits a été annoncée en 2014.

Avec une vraie masse de moins d'un quart de masse jovienne (0,237 ± 0,012 MJ) pour un rayon avoisinant celui de Jupiter (0,912 ± 0,025 RJ), HATS-5 b serait une planète géante gazeuse de faible masse volumique (0,39 ± 0,04 g·cm-3) et à la température d'équilibre élevée (1 025 ± 17 K).

HATS-5 b révolutionne autour de son étoile en moins de cinq jours (4,763 387 ± 0,000 010 j) et à la distance moyenne de 0,054 2 ± 0,000 6 ua, sur une orbite elliptique presque circulaire (excentricité de 0,019 ± 0,019) et dont le plan est presque perpendiculaire (inclinaison de 89,3 ± 0,3°) par rapport à l'équateur de son étoile.

Notes et références

  1. ↑ (en) Résultats pour HATS-5 sur l'application Compute constellation name from position de VizieR
  • (en) George Zhou et al., « HATS-5b: A transiting hot-Saturn from the HATSouth Survey », The Astronomical Journal, vol. 147, no 6,‎ , id. 144 (DOI 10.1088/0004-6256/147/6/144, Bibcode 2014AJ....147..144Z, arXiv 1401.1582, résumé)
    Les coauteurs de l'article sont, outre George Zhou : Daniel Bayliss, K. Penev, G. Á. Bakos, J. D. Hartman, A. Jordán, L. Mancini, M. Mohler, Z. Csubry, S. Ciceri, R. Brahm, M. Rabus, L. Buchhave, T. Henning, V. Suc, N. Espinoza, B. Béky, R. W. Noyes, B. Schmidt, R. Paul Butler, Stephen A. Shectman, I. Thompson, J. Crane, B. Sato, B. Csák, J. Lázár, I. Papp, P. Sári et N. Nikolov.
    L'article a été reçu par la revue The Astronomical Journal le 7 janvier 2014, accepté par son comité de lecture le 2 avril 2014 et publié le 6 mai 2014.

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