Fast-moving features in the debris disk around AU Microscopii - Archive ouverte HAL
Article Dans Une Revue Nature Année : 2015

Fast-moving features in the debris disk around AU Microscopii

Anthony Boccaletti
Christian Thalmann
Anne-Marie Lagrange
  • Fonction : Auteur
Markus Janson
Jean-Charles Augereau
Glenn Schneider
  • Fonction : Auteur
Julien Milli
Carol Grady
John Debes
  • Fonction : Auteur
Maud Langlois
David Mouillet
  • Fonction : Auteur
Thomas Henning
Carsten Dominik
Anne-Lise Maire
  • Fonction : Auteur
Jean-Luc Beuzit
Joseph Carson
  • Fonction : Auteur
Kjetil Dohlen
  • Fonction : Auteur
Natalia Engler
  • Fonction : Auteur
Markus Feldt
  • Fonction : Auteur
  • PersonId : 1337656
Thierry Fusco
Christian Ginski
  • Fonction : Auteur
Julien H. Girard
  • Fonction : Auteur
Dean Hines
  • Fonction : Auteur
Markus Kasper
  • Fonction : Auteur
Dimitri Mawet
Franois Menard
  • Fonction : Auteur
Michael R. Meyer
  • Fonction : Auteur
Claire Moutou
Johan Olofsson
Timothy Rodigas
  • Fonction : Auteur
Jean-Francois Sauvage
Joshua Schlieder
Hans Martin Schmid
  • Fonction : Auteur
Massimo Turatto
Stephane Udry
  • Fonction : Auteur
Farrokh Vakili
  • Fonction : Auteur
Arthur Vigan
Zahed Wahhaj
  • Fonction : Auteur
John Wisniewski

Résumé

In the 1980s, excess infrared emission was discovered around main-sequence stars; subsequent direct-imaging observations revealed orbiting disks of cold dust to be the source(1). These `debris disks' were thought to be by-products of planet formation because they often exhibited morphological and brightness asymmetries that may result from gravitational perturbation by planets. This was proved to be true for the beta Pictoris system, in which the known planet generates an observable warp in the disk(2-5). The nearby, young, unusually active late-type star AU Microscopii hosts a well-studied edge-on debris disk; earlier observations in the visible and near-infrared found asymmetric localized structures in the form of intensity variations along the midplane of the disk beyond a distance of 20 astronomical units(6-9). Here we report high-contrast imaging that reveals a series of five large-scale features in the southeast side of the disk, at projected separations of 10-60 astronomical units, persisting over intervals of 1-4 years. All these features appear to move away from the star at projected speeds of 4-10 kilometres per second, suggesting highly eccentric or unbound trajectories if they are associated with physical entities. The origin, localization, morphology and rapid evolution of these features are difficult to reconcile with current theories.

Dates et versions

hal-01434380 , version 1 (13-01-2017)

Identifiants

Citer

Anthony Boccaletti, Christian Thalmann, Anne-Marie Lagrange, Markus Janson, Jean-Charles Augereau, et al.. Fast-moving features in the debris disk around AU Microscopii. Nature, 2015, 526 (7572), pp.230+. ⟨10.1038/nature15705⟩. ⟨hal-01434380⟩
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