Constraints on long-period planets from an L′- and M-band survey of nearby sun-like stars: Modeling results

A. N. Heinze, Philip M Hinz, Matthew Kenworthy, Michael Meyer, Suresh Sivanandam, Douglas Miller

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We have carried out an L′- and M-band adaptive optics (AO) extrasolar planet imaging survey of 54 nearby, Sun-like stars using the Clio camera at the MMT. Our survey concentrates more strongly than all others to date on very nearby F, G, and K stars, in that we have prioritized proximity higher than youth. Our survey is also the first to include extensive observations in the M band, which supplemented the primary L′ observations. These longer-wavelength bands are most useful for very nearby systems in which low-temperature planets with red IR colors (i.e., H - L′, H - M) could be detected. The survey detected no planets, but set interesting limits on planets and brown dwarfs in the star systems we investigated. We have interpreted our null result by means of extensive Monte Carlo simulations and constrained the distributions of extrasolar planets in mass M and semimajor axis a. If planets are distributed according to a power law with dN M α a β dMda, normalized to be consistent with radial velocity (RV) statistics, we find that a distribution with α = -1.1 and β = -0.46, truncated at 110AU, is ruled out at the 90% confidence level. These particular values of α and β are significant because they represent the most planet-rich case consistent with current statistics from RV observations. With 90% confidence no more than 8.1% of stars like those in our survey have systems with three widely spaced, massive planets like the A star HR 8799. Our observations show that giant planets in long-period orbits around Sun-like stars are rare, confirming the results of shorter-wavelength surveys and increasing the robustness of the conclusion.

Original languageEnglish (US)
Pages (from-to)1570-1581
Number of pages12
JournalAstrophysical Journal
Volume714
Issue number2
DOIs
StatePublished - 2010

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planets
sun
planet
stars
modeling
extrasolar planets
radial velocity
confidence
statistics
G stars
F stars
K stars
A stars
wavelength
adaptive optics
wavelengths
proximity
cameras
orbits
color

Keywords

  • Astrometry
  • Infrared: planetary systems
  • Instrumentation: adaptive optics
  • Planetary systems
  • Planets and satellites: detection

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Constraints on long-period planets from an L′- and M-band survey of nearby sun-like stars : Modeling results. / Heinze, A. N.; Hinz, Philip M; Kenworthy, Matthew; Meyer, Michael; Sivanandam, Suresh; Miller, Douglas.

In: Astrophysical Journal, Vol. 714, No. 2, 2010, p. 1570-1581.

Research output: Contribution to journalArticle

Heinze, A. N. ; Hinz, Philip M ; Kenworthy, Matthew ; Meyer, Michael ; Sivanandam, Suresh ; Miller, Douglas. / Constraints on long-period planets from an L′- and M-band survey of nearby sun-like stars : Modeling results. In: Astrophysical Journal. 2010 ; Vol. 714, No. 2. pp. 1570-1581.
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