MAGELLAN AO SYSTEM z′, y S, and L′ OBSERVATIONS of the VERY WIDE 650 AU HD 106906 PLANETARY SYSTEM

Ya Lin Wu, Laird M. Close, Vanessa P. Bailey, Timothy J. Rodigas, Jared R. Males, Katie M. Morzinski, Katherine B. Follette, Philip M. Hinz, Alfio Puglisi, Runa Briguglio, Marco Xompero

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

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; Δz′ = 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.

Original languageEnglish (US)
Article number24
JournalAstrophysical Journal
Volume823
Issue number1
DOIs
StatePublished - May 20 2016

Keywords

  • circumstellar matter
  • instrumentation: adaptive optics
  • planets and satellites: individual (HD 106906AB b)
  • stars: individual (HD 106906AB)
  • techniques: high angular resolution

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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