Direct imaging of an asymmetric debris disk in the HD 106906 planetary system

Paul G. Kalas, Abhijith Rajan, Jason J. Wang, Maxwell A. Millar-Blanchaer, Gaspard Duchene, Christine Chen, Michael P. Fitzgerald, Ruobing Dong, James R. Graham, Jennifer Patience, Bruce Macintosh, Ruth Murray-Clay, Brenda Matthews, Julien Rameau, Christian Marois, Jeffrey Chilcote, Robert J De Rosa, René Doyon, Zachary H. Draper, Samantha LawlerS. Mark Ammons, Pauline Arriaga, Joanna Bulger, Tara Cotten, Katherine B. Follette, Stephen Goodsell, Alexandra Greenbaum, Pascale Hibon, Sasha Hinkley, Li Wei Hung, Patrick Ingraham, Quinn Konapacky, David Lafreniere, James E. Larkin, Douglas Long, Jérôme Maire, Franck Marchis, Stan Metchev, Katie M. Morzinski, Eric L. Nielsen, Rebecca Oppenheimer, Marshall D. Perrin, Laurent Pueyo, Fredrik T. Rantakyrö, Jean Baptiste Ruffio, Leslie Saddlemyer, Dmitry Savransky, Adam C. Schneider, Anand Sivaramakrishnan, Rémi Soummer, Inseok Song, Sandrine Thomas, Gautam Vasisht, Kimberly Ward-Duong, Sloane J. Wiktorowicz, Schuyler G. Wolff

Research output: Contribution to journalArticlepeer-review

80 Scopus citations


We present the first scattered light detections of the HD 106906 debris disk using the Gemini/Gemini Planet Imager in the infrared and Hubble Space Telescope (HST)/Advanced Camera for Surveys in the optical. HD 106906 is a 13 Myr old F5V star in the Sco-Cen association, with a previously detected planet-mass candidate HD 106906b projected 650 AU from the host star. Our observations reveal a near edge-on debris disk that has a central cleared region with radius ∼50 AU, and an outer extent >500 AU. The HST data show that the outer regions are highly asymmetric, resembling the "needle" morphology seen for the HD 15115 debris disk. The planet candidate is oriented ∼21° away from the position angle of the primary's debris disk, strongly suggesting non-coplanarity with the system. We hypothesize that HD 106906b could be dynamically involved in the perturbation of the primary's disk, and investigate whether or not there is evidence for a circumplanetary dust disk or cloud that is either primordial or captured from the primary. We show that both the existing optical properties and near-infrared colors of HD 106906b are weakly consistent with this possibility, motivating future work to test for the observational signatures of dust surrounding the planet.

Original languageEnglish (US)
Article number32
JournalAstrophysical Journal
Issue number1
StatePublished - Nov 20 2015


  • circumstellar matter
  • infrared: stars
  • stars: individual (HD 106906)
  • techniques: high angular resolution

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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