MMT/AO 5 μm imaging constraints on the existence of giant planets orbiting fomalhaut at 13-40 AU

Matthew A. Kenworthy, Eric E. Mamajek, Philip M. Hinz, Michael R. Meyer, Aren N. Heinze, Douglas L. Miller, Suresh Sivanandam, Melanie Freed

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

A candidate ≲3 M Jup extrasolar planet was recently imaged by Kalas etal. using Hubble Space Telescope/Advanced Camera for Surveys and Keck II at 127 (96AU) separation from the nearby (d = 7.7 pc) young (200 Myr) A2V star Fomalhaut. Here, we report results from M-band (4.8 μm) imaging of Fomalhaut on 2006 December 5 using the Clio IR imager on the 6.5 m MMT with the adaptive secondary mirror. Our images are sensitive to giant planets at orbital radii comparable to the outer solar system (10-40AU). Comparing our 5σ M-band photometric limits to theoretical evolutionary tracks for substellar objects, our results rule out the existence of planets with masses >2 M Jup from 13 to 40AU and objects >13 M Jup from 8 to 40AU.

Original languageEnglish (US)
Pages (from-to)1928-1933
Number of pages6
JournalAstrophysical Journal
Volume697
Issue number2
DOIs
StatePublished - Jan 1 2009

Keywords

  • Astrometry
  • Instrumentation: adaptive optics
  • Planetary systems
  • Stars: individual (Fomalhaut)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Kenworthy, M. A., Mamajek, E. E., Hinz, P. M., Meyer, M. R., Heinze, A. N., Miller, D. L., Sivanandam, S., & Freed, M. (2009). MMT/AO 5 μm imaging constraints on the existence of giant planets orbiting fomalhaut at 13-40 AU. Astrophysical Journal, 697(2), 1928-1933. https://doi.org/10.1088/0004-637X/697/2/1928