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Title: CONFIRMATION OF THE PLANET AROUND HD 95086 BY DIRECT IMAGING

VLT/NaCo angular differential imaging at L' (3.8 μm) revealed a probable giant planet comoving with the young and early-type HD 95086, also known to harbor an extended debris disk. The discovery was based on the proper motion analysis of two datasets spanning 15 months. However, the second dataset suffered from bad atmospheric conditions, which limited the significance of the re-detection at the 3σ level. In this Letter, we report new VLT/NaCo observations of HD 95086 obtained on 2013 June 26 and 27 at L' to recover the planet candidate. We unambiguously re-detect the companion HD 95086 b with multiple independent pipelines at a signal-to-noise ratio greater than or equal to 5. Combined with previously reported measurements, our astrometry decisively shows that the planet is comoving with HD 95086 and inconsistent with a background object. With a revised mass of 5 ± 2 Jupiter masses, estimated from its L' photometry and ''hot-start'' models at 17 ± 4 Myr, HD 95086 b becomes a new benchmark for further physical and orbital characterization of young giant planets.
Authors:
; ;  [1] ; ;  [2] ;  [3] ;  [4] ;  [5] ; ;  [6] ;  [7]
  1. UJF-Grenoble 1/CNRS-INSU, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG) UMR 5274, Grenoble F-38041 (France)
  2. Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden (Netherlands)
  3. LESIA, Observatoire de Paris, CNRS, University Pierre et Marie Curie Paris 6 and University Denis Diderot Paris 7, 5 place Jules Janssen, F-92195 Meudon (France)
  4. Institute for Astronomy, ETH Zurich, Wolfgang-Pauli-Strasse 27, 8093 Zurich (Switzerland)
  5. Department of Astronomy and Astrophysics, University of Toronto, 50 St. George St., Toronto, Ontario M5S 1A1 (Canada)
  6. European Southern Observatory, Casilla 19001, Santiago 19 (Chile)
  7. Max Planck Institute für Astronomy, Königsthul 17, D-69117 Heidelberg (Germany)
Publication Date:
OSTI Identifier:
22364077
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 779; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTRONOMY; ASTROPHYSICS; BENCHMARKS; DETECTION; JUPITER PLANET; MASS; OPTICS; PHOTOMETRY; PROPER MOTION; SATELLITES; SIGNAL-TO-NOISE RATIO; STARS