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Planet 35

NaCo imaging survey for planets around young stars (NaCo-ISPY)

Principal Investigators

  • Dr. A. Müller
    Max-Planck Institut für Astronomie, Heidelberg
  • Prof. Dr. A. Quirrenbach
    Landessternwarte Heidelberg-Königstuhl, Heidelberg


We have carried out a deep NACO L’-band coronagraphic angular differential imaging (ADI) GTO survey for wide-separation giant planets (GPs) around nearby young stars with circumstellar disks. Our main goal is the revelation and characterization of the observationally not yet well-characterised wide-separation (>5-10 au) GP population during the time of formation and dynamical evolution. Our survey was therefore focused on two target groups: (1) stars with protoplanetary transition disks (PPDs) and (2) stars with well-characterised debris disks, many of which show signatures of dynamical activity that could indicate the presence of GPs.
With the combination of L’-band observations, the use of the AGPM coronagraph to minimize the inner working angle for bright stars, and a strategy for going significantly deeper than previous surveys, we optimize the sensitivity to both more embedded (younger) as well as cooler (lower-mass and older) planets than targeted by previous/other surveys. NACO-ISPY is thus far the most systematic and complete direct imaging planet survey focusing on young stars with disks, thus providing an excellent basis for a robust statistical analysis of the occurrence of GPs during these specific early evolutionary phases.


André Müller, Thomas Henning, Andreas Quirrenbach, Damien Ségransan, Ralf Launhardt, Francesco Pepe, Sabine Reffert, Roy van Boekel, Julien Girard, Stanimir Metchev, Johan Olofsson, Sascha Quanz, Didier Queloz, Stefan Brems, Anthony Cheetham, Nico Godoy, Gabriele Cugno, Grant Kennedy, Arianna Musso-Barcucci, Emily Rickman, Matthias Samland

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