Notes for Gl 86

alias HD 13445, HR 637, HIP 10138

by Jean Schneider

update: 21 February 2002

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The planet(s):

• Detection method: Radial Velocity at the Swiss 1.2 m telescope at La Silla
• Basic data:

  Name:	GI86 b
  M.sini:	4 MJ
  Semi-major axis:	0.11 AU
  Orbital period:	15.78 ± 0.04 d.
  Eccentricity:	0.046 ± 0.004
  Omega (deg):	260
  T_peri (JD-2450000):	1177.82
  Inclinaison:	-

• Remarks:
  April 01: A possible brown dwarf companion at ~ 20 AU (Els et al 2001)
  22 Nov. 00: From astrometry Han et al (2000) claim a preliminary mass of 15 M_J and inclination of 164.0^o
  Jul. 8:The star is a spectroscopic binary. The separation between the components is > 10 AU.
• References:
  1. ELS S., STERZIK M., MARCHIS F., PANTIN E., ENDL M. & KUERSTER M., 2001
     A second substellar companion in the Gliese 86 system. A brown dwarf in an extrasolar planetary system.
     Astron. & Astrophys., 370, L1
     paper
  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. LEE M. & PEALE S., 2001b
     Dynamics and Origin of the 2:1 Orbital Resonances of the GJ 86A Planets.
     ApJ, 567, 596
     paper
  5. QUELOZ D., MAYOR M., WEBER L., BLECHA A., BURNET M., CONFINO B., NAEF D., PEPE F., SANTOS N., & UDRY S., 2000
     The CORALIE survey for southern extra-solar planets
     I. A planet orbiting the star Gliese 86
     Astron. & Astrophys., 354, 99
     paper
  6. RYAN S, 2000
     The Host Stars of Extrasolar Planets Have Normal Lithium Abundances.
     MNRAS, in press preprint
• Other Web pages:
  1. ESO Press release
  2. Data and radial velocity curve (Geneva group)
  3. California Planet Search Team data

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The star:

• Distance: 11 pc
• Spectral type: K1V
• Apparent magnitude: V = 6.17
• Coordinates (2000):     RA = 02 10 14.42       DEC = -50 50 00.5
• Metallicity: [Fe/H]= -0.24
• Mass (M_sun): M= 0.79
• More data:
  • Basic Data (from simbad )
  • Most recent refs. (from ADS; enter ` Gl 86 ' in the `objects' field)

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