Magellan AO System z′, Y S , and L′ Observations of the Very Wide 650 AU HD 106906 Planetary System
Journal
Date Issued
2016
Author(s)
Wu, Ya-Lin
•
Close, Laird M.
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Bailey, Vanessa P.
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Rodigas, Timothy J.
•
Males, Jared R.
•
Morzinski, Katie M.
•
Follette, Katherine B.
•
Hinz, Philip M.
•
•
•
Abstract
We analyze archival data from Bailey and co-workers from the Magellan adaptive optics system and present the first 0.9 μm detection (z′ = 20.3 ± 0.4 mag; ∆z′ = 13.0 ± 0.4 mag) of the 11 M Jup circumbinary planet HD 106906AB b, as well as 1 and 3.8 μm detections of the debris disk around the binary. The disk has an east-west asymmetry in length and surface brightness, especially at 3.8 μm where the disk appears to be one-sided. The spectral energy distribution of b, when scaled to the K S -band photometry, is consistent with 1800 K atmospheric models without significant dust reddening, unlike some young, very red, low-mass companions such as CT Cha B and 1RXS 1609 B. Therefore, the suggested circumplanetary disk of Kalas and co-workers might not contain much material, or might be closer to face-on. Finally, we suggest that the widest (a ≳ 100 AU) low mass ratio (M p/M ⋆ ≡ q ≲ 0.01) companions may have formed inside protoplanetary disks but were later scattered by binary/planet interactions. Such a scattering event may have occurred for HD 106906AB b with its central binary star, but definitive proof at this time is elusive. This paper includes data gathered with the 6.5 m Magellan Clay Telescope at Las Campanas Observatory, Chile.
Volume
823
Issue
1
Start page
24
Issn Identifier
0004-637X
Ads BibCode
2016ApJ...823...24W
Rights
open.access
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