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The unseen companion of HD114762: a probable brown dwarf

Abstract

BROWN dwarfs are substellar objects with too little mass to ignite hydrogen in their cores. Despite considerable effort to detect brown dwarfs astrometrically1–4, photometrically4–9, and spectroscopi-cally10–12, only a few good candidates have been discovered. Here we present spectroscopic evidence for a probable brown-dwarf companion to the solar-type star HD114762. This star undergoes periodic variations in radial velocity which we attribute to orbital motion resulting from the presence of an unseen companion. The rather short period of 84 days places the companion in an orbit similar to that of Mercury around the Sun, whereas the rather low velocity amplitude of about 0.6 km s-1 implies that the mass of the companion may be as low as 0.011 solar masses, or 11 Jupiter masses. This leads to the suggestion that the companion is probably a brown dwarf, and may even be a giant planet. However, because the inclination of the orbit to the line of sight is unknown, the mass of the companion may be considerably larger than this lower limit.

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References

  1. Harrington, R. S. in Astrophysics of Brown Dwarfs (eds Kafatos, M. C., Harrington, R. S. & Maran, S. P.) 1–12 (Cambridge Univ. Press, 1986).

    Google Scholar 

  2. van de Kamp, P. Space Sci. Rev. 25, 211–327 (1986).

    ADS  Google Scholar 

  3. McAlister, H. A. A. Rev. Astr. Astrophys. 23, 59–87 (1985).

    Article  ADS  Google Scholar 

  4. Ianna, P. A., Rohde, J. R. & McCarthy D. W. Jr Astr. J. 95, 1226–1230 (1988).

    Article  ADS  Google Scholar 

  5. McCarthy, D. W. Jr, Probst, R. G. & Low, F. J. Astrophys. J. 290, L9–L13 (1985).

    Article  ADS  Google Scholar 

  6. Perrier, C. & Mariotti, J.-M. Astrophys. J. 312, L27–L30 (1987).

    Article  ADS  CAS  Google Scholar 

  7. Zuckerman, B. & Becklin, E. E. Nature 330, 138–140 (1987).

    Article  ADS  Google Scholar 

  8. Becklin, E. E. & Zuckerman, B. Nature 336, 656–658 (1989).

    Article  ADS  Google Scholar 

  9. Forrest, W. J., Skrutskie, M. F. & Shure, M. Astrophys. J. 330, L119–L123 (1988).

    Article  ADS  Google Scholar 

  10. Campbell, B., Walker, G. A. & Yang, S. Astrophys. J. 331, 902–921 (1988).

    Article  ADS  CAS  Google Scholar 

  11. Marcy, G. W. & Moore, D. Astrophys. J. (in the press).

  12. Marcy, G. W. & Benitz, K. J. Astrophys. J. (tn the press).

  13. Mayor, M. & Maurice, E. in IAU Coll. 88, Stellar Radial Velocities (eds Philip, A. G. D. & Latham, D. W.) 299–309 (Davis, Schenectady, 1985).

    Google Scholar 

  14. Latham, D. W. in IAU Coll. 88, Stellar Radial Velocities (eds Philip, A. G. D. & Latham, D. W.) 21–34 (Davis, Schenectady, 1985).

    Google Scholar 

  15. Mayor, M. in IAU Coll. 88, Stellar Radial Velocities (eds Philip, A. G. D. & Latham, D. W.) 35–48 (L. Davis Press, Schenectady, 1985).

    Google Scholar 

  16. Peterson, R. C. & Carney, B. W. Astrophys. J. 231, 762–780 (1979).

    Article  ADS  CAS  Google Scholar 

  17. Laird, J. B. Carney, B. W. & Latham, D. W. Astr. J. 95, 1843–1875 (1988).

    Article  ADS  CAS  Google Scholar 

  18. Latham, D. W., Andersen, J., Geary, J. C., Stefanik, R. P. & Rodrigues, O. in Fiber Optics in Astronomy, Astr. Soc. Pacif. Conf. Ser. Vol. 3 (ed. Barden, S. C.) 269–276 (1988).

    Google Scholar 

  19. Mazeh, T., Kemp, J. C., Leibowitz, E. M., Meningher, H. & Mendelson, H. Astrophys. J. 317, 824–829 (1987).

    Article  ADS  CAS  Google Scholar 

  20. Rufener, F. Catalogue of stars measured in the Geneva Observatory photometric system 4th Edn (Observatoire de Genève, 1988).

    Google Scholar 

  21. Deming, D., Espenak, F., Jennings, D. E. & Brault, J. W. in Astrophysics of Brown Dwarfs (eds Kafatos, M. C., Harrington, R. S. & Maran, S. P.) 58–65 (Cambridge Univ. Press. 1986).

    Google Scholar 

  22. Tarter, J. C. in Astrophysics of Brown Dwarfs (eds Kafatos, M. C., Harrington, R. S. & Maran, S. P.) 121–138 (Cambridge Univ. Press, 1986).

    Google Scholar 

  23. D'Antona, F. in Astrophysics of Brown Dwarfs (eds Kafatos, M. C., Harrington, R. S. & Maran, S. P.) 148–159 (Cambridge Univ. Press, 1986).

    Google Scholar 

  24. Nelson, L. A., Rappaport, S. A. & Joss, P. C. in Astrophysics of Brown Dwarfs (eds Kafatos, M. C., Harrington, R. S. & Maran, S. P.) 177–189 (Cambridge Univ. Press, 1986).

    Google Scholar 

  25. Stevenson, D. J. in Astrophysics of Brown Dwarfs (eds Kafatos, M. C., Harrington, R. S. & Maran, S. P.) 218–232 (Cambridge Univ. Press, 1986).

    Google Scholar 

  26. Boss, A. P. in Astrophysics of Brown Dwarfs (eds Kafatos, M. C., Harrington, R. S. & Maran, S. P.) 206–211 (Cambridge Univ. Press, 1986)

    Google Scholar 

  27. McClure, R. D., Griffin, R. F., Fletcher, J. M., Harris, H. C. & Mayor, M. Publs. astr. Soc. Pacif. 97, 740–744 (1985).

    Article  ADS  Google Scholar 

  28. Brown, R. A. presented at the Joint Workshop of the National Acad. Sci. and the Acad. Sci. of the USSR on Planetary Science, Moscow (January 1989).

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Latham, D., Mazeh, T., Stefanik, R. et al. The unseen companion of HD114762: a probable brown dwarf. Nature 339, 38–40 (1989). https://doi.org/10.1038/339038a0

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