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A temperate super-Jupiter imaged with JWST in the mid-infrared.
Matthews, E C; Carter, A L; Pathak, P; Morley, C V; Phillips, M W; P M, S Krishanth; Feng, F; Bonse, M J; Boogaard, L A; Burt, J A; Crossfield, I J M; Douglas, E S; Henning, Th; Hom, J; Ko, C-L; Kasper, M; Lagrange, A-M; Petit Dit de la Roche, D; Philipot, F.
Afiliação
  • Matthews EC; Max Planck Institute for Astronomy, Heidelberg, Germany. matthews@mpia.de.
  • Carter AL; Space Telescope Science Institute, Baltimore, MD, USA.
  • Pathak P; Department of SPASE, Indian Institute of Technology Kanpur, Kanpur, India.
  • Morley CV; Department of Astronomy, University of Texas at Austin, Austin, TX, USA.
  • Phillips MW; Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh, UK.
  • P M SK; Steward Observatory and Department of Astronomy, Tucson, AZ, USA.
  • Feng F; Shanghai Jiao Tong University, Shanghai, People's Republic of China.
  • Bonse MJ; ETH Zurich, Institute for Particle Physics & Astrophysics, Zurich, Switzerland.
  • Boogaard LA; Max Planck Institute for Intelligent Systems, Tübingen, Germany.
  • Burt JA; Max Planck Institute for Astronomy, Heidelberg, Germany.
  • Crossfield IJM; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA.
  • Douglas ES; Department of Physics and Astronomy, University of Kansas, Lawrence, KS, USA.
  • Henning T; Steward Observatory and Department of Astronomy, Tucson, AZ, USA.
  • Hom J; Max Planck Institute for Astronomy, Heidelberg, Germany.
  • Ko CL; Steward Observatory and Department of Astronomy, Tucson, AZ, USA.
  • Kasper M; Steward Observatory and Department of Astronomy, Tucson, AZ, USA.
  • Lagrange AM; European Southern Observatory, Munich, Germany.
  • Petit Dit de la Roche D; LESIA, Observatoire de Paris, Université PSL, CNRS, Meudon, France.
  • Philipot F; Department of Astronomy, University of Geneva, Versoix, Switzerland.
Nature ; 633(8031): 789-792, 2024 Sep.
Article em En | MEDLINE | ID: mdl-39048015
ABSTRACT
Of the approximately 25 directly imaged planets to date, all are younger than 500 Myr, and all but six are younger than 100 Myr (ref. 1). Eps Ind A (HD209100, HIP108870) is a K5V star of roughly solar age (recently derived as 3.7-5.7 Gyr (ref. 2) and 3.5 - 1.3 + 0.8 Gyr (ref. 3)). A long-term radial-velocity trend4,5 and an astrometric acceleration6,7 led to claims of a giant planet2,8,9 orbiting the nearby star (3.6384 ± 0.0013 pc; ref. 10). Here we report JWST coronagraphic images which reveal a giant exoplanet that is consistent with these radial and astrometric measurements but inconsistent with the previously claimed planet properties. The new planet has a temperature of approximately 275 K and is remarkably bright at 10.65 and 15.50 µm. Non-detections between 3.5 and 5.0 µm indicate an unknown opacity source in the atmosphere, possibly suggesting a high-metallicity, high carbon-to-oxygen ratio planet. The best-fitting temperature of the planet is consistent with theoretical thermal evolution models, which were previously untested at this temperature range. The data indicate that this is probably the only giant planet in the system, and therefore we refer to it as b, despite it having significantly different orbital properties than the previously claimed planet b.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nature Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Alemanha País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nature Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Alemanha País de publicação: Reino Unido