Exoplanets

Exoplanets are the celestial bodies orbiting stars other than our Sun. Their small size makes them difficult to detect from Earth, particularly as they appear much dimmer than their parent stars. So indirect methods are employed, such as observing changes in starlight as a result of the exoplanet and its motion.

Latest Research and Reviews

  • Research |

    Two Hα emission peaks are detected within the disk of the T Tauri star PDS 70: one corresponds to protoplanet PDS 70 b, and the other is associated with a second accreting planet of few Jupiter masses at ~35 au. The two protoplanets are near 2:1 mean motion resonance, supporting migration scenarios of giant planets during planetary formation.

    • S. Y. Haffert
    • , A. J. Bohn
    • , J. de Boer
    • , I. A. G. Snellen
    • , J. Brinchmann
    • , J. H. Girard
    • , C. U. Keller
    •  & R. Bacon
  • Research |

    Compact exoplanetary systems frequently experience spin–orbit coupling driven by secular resonances, which can shape their architecture, allowing the planet to maintain a large obliquity and inducing the piling up of planets just wide of the first-order resonance.

    • Sarah Millholland
    •  & Gregory Laughlin
    Nature Astronomy 3, 424-433
  • Research |

    The initial abundance of 26Al in a planetary system determines the surface environment of its solid planets. High levels of 26Al will dehydrate planetesimals and produce water-poor worlds similar to the terrestrial planets in our Solar System; sub-solar levels of 26Al will preferentially generate ocean planets.

    • Tim Lichtenberg
    • , Gregor J. Golabek
    • , Remo Burn
    • , Michael R. Meyer
    • , Yann Alibert
    • , Taras V. Gerya
    •  & Christoph Mordasini
    Nature Astronomy 3, 307-313
  • Research |

    Kepler-107 b and c have the same radius but, contrary to expectations, the outermost Kepler-107 c is much denser. This difference cannot be explained by photoevaporation by stellar high-energy particle flux and it suggests that Kepler-107 c experienced a giant impact event.

    • Aldo S. Bonomo
    • , Li Zeng
    • , Mario Damasso
    • , Zoë M. Leinhardt
    • , Anders B. Justesen
    • , Eric Lopez
    • , Mikkel N. Lund
    • , Luca Malavolta
    • , Victor Silva Aguirre
    • , Lars A. Buchhave
    • , Enrico Corsaro
    • , Thomas Denman
    • , Mercedes Lopez-Morales
    • , Sean M. Mills
    • , Annelies Mortier
    • , Ken Rice
    • , Alessandro Sozzetti
    • , Andrew Vanderburg
    • , Laura Affer
    • , Torben Arentoft
    • , Mansour Benbakoura
    • , François Bouchy
    • , Jørgen Christensen-Dalsgaard
    • , Andrew Collier Cameron
    • , Rosario Cosentino
    • , Courtney D. Dressing
    • , Xavier Dumusque
    • , Pedro Figueira
    • , Aldo F. M. Fiorenzano
    • , Rafael A. García
    • , Rasmus Handberg
    • , Avet Harutyunyan
    • , John A. Johnson
    • , Hans Kjeldsen
    • , David W. Latham
    • , Christophe Lovis
    • , Mia S. Lundkvist
    • , Savita Mathur
    • , Michel Mayor
    • , Giusi Micela
    • , Emilio Molinari
    • , Fatemeh Motalebi
    • , Valerio Nascimbeni
    • , Chantanelle Nava
    • , Francesco Pepe
    • , David F. Phillips
    • , Giampaolo Piotto
    • , Ennio Poretti
    • , Dimitar Sasselov
    • , Damien Ségransan
    • , Stéphane Udry
    •  & Chris Watson
    Nature Astronomy 3, 416-423
  • Research |

    ALMA observations of well-studied quadruple stellar system HD 98800 have revealed the presence of a circumbinary disk in a polar orientation around one of the binary pairs, providing observational confirmation of the theoretical stability of such an arrangement.

    • Grant M. Kennedy
    • , Luca Matrà
    • , Stefano Facchini
    • , Julien Milli
    • , Olja Panić
    • , Daniel Price
    • , David J. Wilner
    • , Mark C. Wyatt
    •  & Ben M. Yelverton
    Nature Astronomy 3, 230-235
  • Research |

    Observations at millimetre wavelengths reveal a young protostar surrounded by a disk with two differently tilted regions.

    • Nami Sakai
    • , Tomoyuki Hanawa
    • , Yichen Zhang
    • , Aya E. Higuchi
    • , Satoshi Ohashi
    • , Yoko Oya
    •  & Satoshi Yamamoto
    Nature 565, 206-208

News and Comment