Notes for Gliese 876

by Jean Schneider

update: 4 November 2002

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The planet(s):

• Detection method: Radial Velocity
• Basic data:

  The star:

  Remarks:
  • 7 march 01: From stability considerations, Lauglin & Chambers argue that "the facteors for the 2 planets are likely in the 1.25 - 2.0 range" (implying a sini of ~ 0.6 (Chambers & Laughlin, 2001)
  • Circumstellar disk searched for at UKIRT and KECK but not found (Trilling et al. 1999, 2000)
  References:

  1. BENEDICT F., McARTHUR E., FORVEILLE T., DELFOSSE X., NELAN E., BUTLER R., PIESMAN W., MARCY G., GOLDMAN B., PERRIER C., JEFFREYS W. & MAYOR M., 2002
     A Mass for the Extrasolar Planet Gl 876b Determined from Hubble Space Telescope Fine Guidance Sensor 3 Astrometry and High-Precision Radial Velocities.
     ApJ. Letters, submitted
  2. DELFOSSE X., FORVEILLE T., MAYOR M. PERRIER C., NAEF D.& QUELOZ D., 1998
     A giant planet around the M4 dwarf Gl 876
     Astron. & Astrophys., 338, L67
     paper
  3. GOZ'DZIEWSKI K. & BOIS E., 2002
     Global dynamics of the Gliese 876 planetary system.
     MNRAS, 332, 839
     paper
  4. HADJIDEMETRIOU J., 2002
     Resonant periodic motion and the stability of extrasolar planetary systems.
     Celestial Mechanics and Dynamical Astronomy, in press preprint
  5. JI J., LI G. & LIU L., 2002
     The dynamical simulations of the planets orbiting GJ 876.
     ApJ., 572, 1041
     paper
  6. JIANGHUI J., GUANGYU L. & LIN L., 2002
     The Dynamical Simulations of the Planets Orbiting GJ 876.
     ApJ, 572, 20 June
     preprint
  7. JONES B. & SLEEP P., 2002a
     The Orbits of Terrestrial Planets in the Habitable Zones of Known Exoplanetary Systems.
     in Scientific Frontiers in Research on Extrasolar Planets, edited by Deming and Seager. ASP Conference Series.
     paper
  8. KINOSHITA H. & NAKAI H., 2001
     Stability of the GJ 876 Planetary System.
     PASJ, 53, L25
     paper
  9. LAUGHLIN G. & CHAMBERS J., 2001
     Short-Term Dynamical Interactions Among Extrasolar Planets.
     ApJ. Lett., submitted
     preprint
  10. LEE M. & PEALE S., 2001
      Evolution of the GJ876 Planets into the 2:1 Orbital Resonance.
      BAAS, 34, #3.03
      paper
  11. LEE M. & PEALE S., 2002c
      Extrasolar Planets and Mean-Motion Resonances.
      in Scientific Frontiers in Research on Extrasolar Planets, Deming & Seager Eds. (ASP Conf. Series)
      paper
  12. MARCY G., BUTLER P., FISCHER D., VOGT S., LISSAUER J. & RIVERA E., 2001b
      A Pair of Resonant Planets Orbiting GJ 876.
      ApJ., submitted.
      preprint
  13. MARCY G., BUTLER P., VOGT S., FISCHER D. & LISSAUER J., 1998
      A Planetary Companion to the M4 Dwarf, Gliese 876
      ApJ. Letters. 505, L147
      paper
  14. MARCY G., BUTLER P. & VOGT S., 1998
      Searches for planetary companions with Lick, Keck and AAT.
      in Proceedings of IAU Colloquium 170, Precise stellar radial velocities (J.B.Hearnshaw & C.D.Scarfe Eds.), ASP Conf. Series (1999) in press
      abstract
  15. NAUENBERG M., 2001
      Determination of Masses and Other Properties of Extra-Solar Planetary Systems with More than One Planet.
      ApJ., 568, 369
      paper
  16. RIVERA E. & LISSAUER J., 2002
      Dynamical Models of the Resonant Pair of Planets Orbiting the Star GJ 876.
      in DDA 33rd Meeting
      BAAS, 34, #9.03
      abstract
  17. SNELLGROVE M., PAPALOIZOU J. & NELSON R., 2001
      On disc driven inward migration of resonantly coupled planets with application to the system around Gj876.
      Astron. & Astrophys., submitted
      preprint
  18. RIVERA E. & LISSAUER J., 2001
      Dynamical Models of the Resonant Pair of Planets Orbiting the Star GJ 876.
      ApJ, submitted
  19. TAMBURINI F., BIANCHINI A. & ORTOLANI S., 2002
      Polarization statistics of extra-solar systems.
      Astron. & Astrophys., submitted
      preprint
  20. TRILLING D., BROWN R. & RIVKIN A., 1999
      Circumstellar dust disks and extrasolar planets: Far-off analogs of our Solar System
      in 31^st Annual Meeting of the DPS
      abstract
  21. TRILLING D., BROWN R. & RIVKIN A., 2000
      Circumstellar Dust Disks around Stars with Known Planetary Companions.
      ApJ., 529, 499
      paper
  Other Web pages:

  1. Data and velocity curves (Marcy, Butler et al.
  2. Geneva Observatory data
  3. Protoplanetary disk with 2 planets (G. Bryden)

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  • Distance: 4.72 pc
  • Spectral type: M4V
  • Apparent magnitude: V = 10.17
  • Absolute luminosity: 0.0124 L_sun
  • Coordinates (2000):    RA = 22 53 13.4& nbsp;     DEC = -14 15 13
  • Metallicity: [Fe/H]= 0.
  • Mass (M_sun): M= 0.32
  • More data:
    • Basic Data (from simbad )
    • Most recent refs. (from ADS; enter ` ' in the `objects' field)

  ---

  Back to the Extra-solar Planets Catalog

  Name:	Gl 876 b	Gl 876 c
  M.sini:	1.89 MJ	0.56 MJ
  Semi-major axis:	0.21 AU	0.13 AU
  Orbital period:	61.02 d.	30.1 d
  Eccentricity:	0.10	0.27
  Inclination	sini = 0.6 ?	sini = 0.6 ?
  Omega (deg):	333	330
  T_peri (JD-2450000):	106.2	31.4
  Inclinaison:	-	-