Notes for Gl 86

by Jean Schneider

update: 4 April 2005

The planet(s):

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

  Name:	GI86 b
  M.sini:	4.01 MJ
  Semi-major axis:	0.11 AU
  Orbital period:	15.766 ± 0.04 d.
  Eccentricity:	0.046 ± 0.004
  Omega (deg):	266
  T_peri (JD-2450000):	1146.54
  Inclination:	-

• Remarks:
  20 apr. 03: Planet in wide (a ~ 19 AU) binary system (Eggenberger et al 2003) 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. BEICHMAN CC., BRYDEN G., PIEKE G., STANSBERRY J., TRILLING D., STAPELFELDT K., WERNER M., ENGELBRECHT C., BLAYLOCK M., GORDON K., CHEN C., SU K. & HINES D., 2004
     Planets and IR Excesses: Preliminary Results from a Spitzer MIPS Survey of Solar-Type Stars.
     ApJ. , 622, 1160
     paper
  2. EGGENBERGER A., UDRY S. & MAYOR M., 2003
     Planets in binaries.
     in Scientific Frontiers in Research on Extrasolar Planets, ASP Conference Series. D.Deming and S.Seager, eds.
     paper
  3. 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
  4. GIMENEZ A., 2000
     ubvy Photometry of stars with planets.
     Astron. & Astrophys., 356, 213.
     paper
  5. HAN I., BLACK D. & GATEWOOD G., 2000
     Preliminary astrometric masses for proposed exrasolar planetary companions.
     ApJ. Letters, accepted
     paper
  6. LEE M. & PEALE S., 2001b
     Dynamics and Origin of the 2:1 Orbital Resonances of the GJ 86A Planets.
     ApJ, 567, 596
     paper
  7. MUSIELAK Z., STUFF T. & CUNTZ M., 2005
     Stability of planetary orbits in binary systems.
     Astron. & Astrophys., 434, 355
     paper
  8. 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
  9. RYAN S, 2000
     The Host Stars of Extrasolar Planets Have Normal Lithium Abundances.
     MNRAS, in press preprint
  10. SOLOVAYA N. & PITTICH E., 2004
      The dynamical stability of extra-solar planets in binary systems.
      Contributions of the Astronomical Observatory Skalnaté Pleso, 34, 105
      abstract
  11. STEVENS I., 2004
      Magnetospheric Radio Emission from Extrasolar Giant Planets: The Role of the Host Stars.
      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

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)