Stellar companions to stars with planets

Jennifer Patience, R. J. White, A. M. Ghez, C. McCabe, I. S. McLean, J. E. Larkin, L. Prato, Sungsoo S. Kim, J. P. Lloyd, M. C. Liu, J. R. Graham, B. A. Macintosh, D. T. Gavel, C. E. Max, B. J. Bauman, S. S. Olivier, P. Wizinowich, D. S. Acton

Research output: Contribution to journalArticle

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Abstract

A combination of high-resolution and wide-field imaging reveals two binary stars and one triple star system among the sample of the first 11 stars with planets detected by radial velocity variations. High-resolution speckle or adaptive optics (AO) data probe subarcsecond scales down to the diffraction limit of the Keck 10 m or the Lick 3 m, and direct images or AO images are sensitive to a wider field, extending to 10″ or 38″, depending on the camera. One of the binary system - HD 114762 - was not previously known to be a spatially resolved multiple system; additional data taken with the combination of Keck adaptive optics and NIRSPEC are used to characterize the new companion. The second binary system - τ Boo - was a known multiple with two conflicting orbital solutions; the current data will help constrain the discrepant estimates of periastron time and separation. Another target - 16 Cyg B - was a known common proper motion binary, but the current data resolve a new third component, close to the wide companion 16 Cyg A. Both the HD 114762 and 16 Cyg B systems harbor planets in eccentric orbits, while the τ Boo binary contains an extremely close planet in a tidally circularized orbit. Although the sample is currently small, the proportion of binary systems is comparable to that measured in the field over a similar separation range. Incorporating the null result from another companion search project lowers the overall fraction of planets in binary systems, but the detections in our survey reveal that planets can form in binaries separated by less than 50 AU.

Original languageEnglish (US)
Pages (from-to)654-665
Number of pages12
JournalAstrophysical Journal
Volume581
Issue number1 I
DOIs
StatePublished - Dec 10 2002
Externally publishedYes

Fingerprint

planets
planet
stars
adaptive optics
triple stars
eccentric orbits
harbors
high resolution
binary stars
speckle
proper motion
radial velocity
diffraction
proportion
harbor
cameras
probe
optics
orbits
orbitals

Keywords

  • Binaries: general
  • Planetary systems
  • Stars: individual (HD 114762, τ Bootis, 16 Cygni B)
  • Techniques: high angular resolution

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Patience, J., White, R. J., Ghez, A. M., McCabe, C., McLean, I. S., Larkin, J. E., ... Acton, D. S. (2002). Stellar companions to stars with planets. Astrophysical Journal, 581(1 I), 654-665. https://doi.org/10.1086/342982

Stellar companions to stars with planets. / Patience, Jennifer; White, R. J.; Ghez, A. M.; McCabe, C.; McLean, I. S.; Larkin, J. E.; Prato, L.; Kim, Sungsoo S.; Lloyd, J. P.; Liu, M. C.; Graham, J. R.; Macintosh, B. A.; Gavel, D. T.; Max, C. E.; Bauman, B. J.; Olivier, S. S.; Wizinowich, P.; Acton, D. S.

In: Astrophysical Journal, Vol. 581, No. 1 I, 10.12.2002, p. 654-665.

Research output: Contribution to journalArticle

Patience, J, White, RJ, Ghez, AM, McCabe, C, McLean, IS, Larkin, JE, Prato, L, Kim, SS, Lloyd, JP, Liu, MC, Graham, JR, Macintosh, BA, Gavel, DT, Max, CE, Bauman, BJ, Olivier, SS, Wizinowich, P & Acton, DS 2002, 'Stellar companions to stars with planets', Astrophysical Journal, vol. 581, no. 1 I, pp. 654-665. https://doi.org/10.1086/342982
Patience J, White RJ, Ghez AM, McCabe C, McLean IS, Larkin JE et al. Stellar companions to stars with planets. Astrophysical Journal. 2002 Dec 10;581(1 I):654-665. https://doi.org/10.1086/342982
Patience, Jennifer ; White, R. J. ; Ghez, A. M. ; McCabe, C. ; McLean, I. S. ; Larkin, J. E. ; Prato, L. ; Kim, Sungsoo S. ; Lloyd, J. P. ; Liu, M. C. ; Graham, J. R. ; Macintosh, B. A. ; Gavel, D. T. ; Max, C. E. ; Bauman, B. J. ; Olivier, S. S. ; Wizinowich, P. ; Acton, D. S. / Stellar companions to stars with planets. In: Astrophysical Journal. 2002 ; Vol. 581, No. 1 I. pp. 654-665.
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