Status Report

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

By SpaceRef Editor
November 9, 2015
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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 Lawler, S. 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, et al. (11 additional authors not shown)
(Submitted on 9 Oct 2015)

We present the first scattered light detections of the HD 106906 debris disk using Gemini/GPI in the infrared and HST/ACS 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 the outer regions are highly asymmetric, resembling the ”needle” morphology seen for the HD 15115 debris disk. The planet candidate is oriented ∼21deg 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.

Comments: Accepted for publication in the Astrophysical Journal; 15 pages, 7 figures
Subjects: Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:1510.02747 [astro-ph.EP]
(or arXiv:1510.02747v1 [astro-ph.EP] for this version)
Submission history
From: Paul Kalas
[v1] Fri, 9 Oct 2015 17:32:59 GMT (2156kb,D)

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