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The Gemini NICI planet-finding campaign: the orbit of the young exoplanet β Pictoris b

Authors
  • Eric Nielsen
  • Michael C, Liu
  • Zahed, Wahhaj
  • Beth A, Biller
  • Thomas L, Hayward
  • Jared R, Males
  • Laird M, Close
  • Katie M, Morzinski
  • Andrew J, Skemer
  • Marc J, Kuchner
  • Timothy J, Rodigas
  • Philip M, Hinz
  • Mark, Chun
  • Christ, Ftaclas
  • Douglas W, Toomey
Type
Published Article
Journal
The Astrophysical Journal
Publisher
American Astronomical Society
Publication Date
Oct 06, 2014
Volume
794
Issue
2
Pages
158–158
Source
SETI Institute
License
Unknown

Abstract

We present new astrometry for the young (12-21 Myr) exoplanet β Pictoris b taken with the Gemini/NICI and Magellan/MagAO instruments between 2009 and 2012. The high dynamic range of our observations allows us to measure the relative position of β Pic b with respect to its primary star with greater accuracy than previous observations. Based on a Markov Chain Monte Carlo analysis, we find the planet has an orbital semi-major axis of 9.1$^+ 5.3 _ -0.5 $ AU and orbital eccentricity< 0.15 at 68% confidence (with 95% ...

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