Thermal infrared constraint to a planetary companion of Vega with the MMT adaptive optics system

Philip M Hinz, A. N. Heinze, Suresh Sivanandam, Douglas L. Miller, Matthew A. Kenworthy, Guido Brusa, Melanie Freed, J Roger P Angel

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Vega may have a massive companion in a wide orbit, as evidenced by structure in its cold dust debris. We have tested this hypothesis by direct imaging with adaptive optics in the M band. The observations were made with a newly commissioned thermal infrared camera, Clio, on the 6.5 MMT AO system with low-background deformable secondary mirror. The observations constrain a planet to be less than 7 MJ at the approximate position angle expected from the dust structure and at a radius >20 AU (2″.5). This result is more stringent than similar previous near-infrared observations of Vega, which achieved limits of 20 and 10 MJ at separations of 7″. The higher sensitivity is due to both the more favorable contrast of gas giant planets at the M band and the higher Strehl ratio and more stable point spread function at longer wavelengths. Future L′ or M band observations could provide a powerful approach for wide-separation planet detection, especially for cooler and thus older or less massive planets. The natural best targets are nearby stars, where planets in the range of 5-15 MJ and as old as several Gyr are expected to be detectable with this technique.

Original languageEnglish (US)
Pages (from-to)1486-1492
Number of pages7
JournalAstrophysical Journal
Volume653
Issue number2 I
DOIs
StatePublished - Dec 20 2006

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adaptive optics
planet
planets
dust
gas giant planets
planet detection
ultrahigh frequencies
point spread functions
coolers
debris
cameras
mirrors
orbits
near infrared
stars
radii
sensitivity
wavelength
wavelengths
gas

Keywords

  • Infrared: stars
  • Instrumentation: adaptive optics
  • Planetary systems
  • Stars: individual (Vega)

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Thermal infrared constraint to a planetary companion of Vega with the MMT adaptive optics system. / Hinz, Philip M; Heinze, A. N.; Sivanandam, Suresh; Miller, Douglas L.; Kenworthy, Matthew A.; Brusa, Guido; Freed, Melanie; Angel, J Roger P.

In: Astrophysical Journal, Vol. 653, No. 2 I, 20.12.2006, p. 1486-1492.

Research output: Contribution to journalArticle

Hinz, PM, Heinze, AN, Sivanandam, S, Miller, DL, Kenworthy, MA, Brusa, G, Freed, M & Angel, JRP 2006, 'Thermal infrared constraint to a planetary companion of Vega with the MMT adaptive optics system', Astrophysical Journal, vol. 653, no. 2 I, pp. 1486-1492. https://doi.org/10.1086/506581
Hinz PM, Heinze AN, Sivanandam S, Miller DL, Kenworthy MA, Brusa G et al. Thermal infrared constraint to a planetary companion of Vega with the MMT adaptive optics system. Astrophysical Journal. 2006 Dec 20;653(2 I):1486-1492. https://doi.org/10.1086/506581
Hinz, Philip M ; Heinze, A. N. ; Sivanandam, Suresh ; Miller, Douglas L. ; Kenworthy, Matthew A. ; Brusa, Guido ; Freed, Melanie ; Angel, J Roger P. / Thermal infrared constraint to a planetary companion of Vega with the MMT adaptive optics system. In: Astrophysical Journal. 2006 ; Vol. 653, No. 2 I. pp. 1486-1492.
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