liu

Notes for HD 114762

by Jean Schneider

update: 22 November 2000

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The companion(s):

• Detection method: Radial Velocity

• Remarks: I do provisionaly classify this object as `brown dwarf' because, in spite of the fact that its Mxsini is smaller than the 13 M_J limit for brown dwarfs, there are indications that its inclination is low (i much less than 90^o, Hale 1995), so that its mass is finally likely to be above 13 M_J. See the discussion by Mazeh et al. (1996) based on 495 RV data.
  22 Nov. 00: From astrometry Han et al (2000) claim a preliminary mass of 145 M_J and inclination of 4.3^o
  
• Data:
  • Mass:M x sini =
    11.02 M_J from Marcy et al. 1998h
    - 9 M_J from Mazeh et al. 1996
  • Period:
    - 84.05 d. from Latham et al. 1989
    - 84.02 d. from Marcy et al.
  • Inclination:
    - From Robinson et al. (1990) the inclination cannot be high since there are no eclipses
    - From rotational velocity and V x sini measurements, the inclination is likely to be low (Cochran 1991, Hale 1995)

• References:
  1. COCHRAN W., HATZES A. & HANCOCK J., 1991
     "Constraints on the Companion Object to HD114762
     ApJ. Letters, 380, L35
     ( abstract).
  2. GIMENEZ A., 2000
     ubvy Photometry of stars with planets.
     Astron. & Astrophys., 356, 213.
     paper
  3. HAN I., BLACK D. & GATEWOOD G., 2000
     Preliminary astrometric masses for proposed exrasolar planetary companions.
     ApJ. Letters, accepted
     paper
  4. HENRY G., BALIUNAS S., DONAHUE R., SOON W., & SAAR S., 1996
     Properties of Sun-like Stars with Planets: 51 Pegasi, 47 Ursae Majoris, 70 Virginis, and HD114762
     Apj., 474, 503
     paper
  5. LATHAM D. W., STEFANIK R. P., MAZEH T., MAYOR M. & BURKI, G. 1989
     The unseen companion of HD114762 - A probable brown dwarf
     Nature, 339, 38
     ( Abstract).
  6. LLOYD J., LIU M., GRAHAM J., ENOCH M., KALAS P., MARCY G., FISCHER D., PATIENCE J., MACINTOSH B., GAVEL D., OLIVIER S., MAX C., WHITE R., GHEZ A. & McLEAN I., 2001
     An Adaptive Optics Survey for Companions to Stars with Extra-Solar Planets.
     in Proceedings of IAU Symposium 202, "Planetary Systems in the Universe: Observation, Formation and Evolution,", eds. A. Penny, P. Artymowicz, A.-M. Lagrange, and S. Russell
     paper
  7. MARCY G., BUTLER P., VOGT S., FISCHER D. & LIU M., 1998h
     Two New Planets in Eccentric Orbits.
     Apj. submitted
     preprint
  8. MAZEH T., LATHAM D. W. & STEFANIK R. P., 1996
     Spectroscopic Orbits for Three Binaries with Low-Mass Companions and the Distribution of Secondary Masses Near the Substellar Limit
     ApJ. 466, 415
     abstract and paper with figures 1 2 3 4 5 6 7 and tables 1 2 3 4
  9. ROBINSON, E. L. COCHRAN, A. L. COCHRAN W. D.SHAFTER A. W. and ZHANG, ER-HO, 1990
     A search for eclipses of HD 114762 by a low-mass companion
     Astronomical J., 99, 672
     ( Abstract).
  10. RYAN S, 2000
      The Host Stars of Extrasolar Planets Have Normal Lithium Abundances.
      MNRAS, in press preprint
  11. COCHRAN W. C. 1991
      The companion object to HD114762
      Reports of Planetary Astronomy, NASA, pp. 153-154
      ( Abstract).
  12. HALE, Alan 1995
      On the nature of the companion to HD 114762
      PASP, 107, 22
      ( Abstract).

• Other Web pages:
  • Velocity curve and basic data (Marcy, Butler et al

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The star:

• Distance: 28 pc (from photometry, Laird, Carney & Latham, AJ, 95, 1843 (1988)).
• Spectral type: F9V
• Apparent magnitude: B = 7.85, V = 7.30
• Coordinates (2000): RA = 13 12 21.73, DEC = +17 31 01.23
• Metallicity: [Fe/H] = -.5
• Mass (M_sun): M = 0.82
• More data:
  • Basic Data (from simbad )
  • Most recent refs. (from ADS; enter `HD 114762' in the `objects' field)

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