Debris distribution in HD 95086 - A young analog of HR 8799

Kate Y L Su, Sarah Morrison, Renu Malhotra, Paul S. Smith, Zoltan Balog, George H. Rieke

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

HD 95086 is a young early-type star that hosts (1) a 5 MJ planet at the projected distance of 56AU revealed by direct imaging, and (2) a prominent debris disk. Here we report the detection of 69 μm crystalline olivine feature from the disk using the Spitzer/MIPS-SED data covering 55-95 μm. Due to the low resolution of the MIPS-SED mode, this feature is not spectrally resolved, but is consistent with the emission from crystalline forsterite contributing ∼5% of the total dust mass. We also present detailed analysis of the disk spectral energy distribution and re-analysis of resolved images obtained by Herschel. Our results suggest that the debris structure around HD 95086 consists of a warm (∼175 K) belt, a cold (∼55 K) disk, and an extended disk halo (up to ∼800AU), and is very similar to that of HR 8799. We compare the properties of the three debris components, and suggest that HD 95086 is a young analog of HR 8799. We further investigate and constrain single-planet, two-planet, three-planet, and four-planet architectures that can account for the observed debris structure and are compatible with dynamical stability constraints. We find that equal-mass four-planet configurations of geometrically spaced orbits, with each planet of mass ∼ 5 MJ, could maintain the gap between the warm and cold debris belts, and also be just marginally stable for timescales comparable to the age of the system.

Original languageEnglish (US)
Article number146
JournalAstrophysical Journal
Volume799
Issue number2
DOIs
StatePublished - Feb 1 2015

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debris
planets
planet
analogs
forsterite
spectral energy distribution
distribution
young
olivine
halos
coverings
dust
timescale
orbits
stars
configurations
energy

Keywords

  • Circumstellar matter
  • Infrared: stars
  • Planetary systems
  • Stars: individual (HD 95086)

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Debris distribution in HD 95086 - A young analog of HR 8799. / Su, Kate Y L; Morrison, Sarah; Malhotra, Renu; Smith, Paul S.; Balog, Zoltan; Rieke, George H.

In: Astrophysical Journal, Vol. 799, No. 2, 146, 01.02.2015.

Research output: Contribution to journalArticle

Su, Kate Y L ; Morrison, Sarah ; Malhotra, Renu ; Smith, Paul S. ; Balog, Zoltan ; Rieke, George H. / Debris distribution in HD 95086 - A young analog of HR 8799. In: Astrophysical Journal. 2015 ; Vol. 799, No. 2.
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