The HARPS search for southern extra-solar planets: XVIII. An Earth-mass planet in the GJ 581 planetary system
@article{Mayor2009TheHS, title={The HARPS search for southern extra-solar planets: XVIII. An Earth-mass planet in the GJ 581 planetary system}, author={Michel Mayor and Xavier Bonfils and Thierry Forveille and Xavier Delfosse and St{\'e}phane Udry and J L Bertaux and Herv'e Beust and François Bouchy and Cristophe Lovis and Francesco A. Pepe and Christian Perrier and Didier Queloz and Nuno C. Santos}, journal={Astronomy and Astrophysics}, year={2009}, volume={507}, pages={487-494} }
The GJ 581 planetary system was already known to harbour three planets, including two presumably rocky planets which straddle its habitable zone. We report here the detection of an additional planet ‐ GJ 581e ‐ with a minimum mass of 1.9 M" . With a period of 3.15 days, it is the innermost planet of the system and has a # 5% transit probability. We also correct our previous confusion of the orbital period of GJ 581d (the outermost planet) with a one-year alias, thanks to an extended time span…
305 Citations
The HARPS search for southern extra-solar planets - XXXVI. Planetary systems and stellar activity of the M dwarfs GJ 3293, GJ 3341, and GJ 3543
- Physics, Geology
- 2015
Context. Planetary companions of a fixed mass induce reflex motions with a larger amplitude around lower-mass stars, which adds to making M dwarfs excellent targets for extra-solar planet searches.…
The HARPS search for southern extra-solar planets - XIX. Characterization and dynamics of the GJ 876 planetary system
- Physics, Geology
- 2010
Precise radial-velocity measurements for data acquired with the HARPS spectrograph infer that three planets orbit the M4 dwarf star GJ876. In particular, we confirm the existence of planet d, which…
THE LICK–CARNEGIE SURVEY: A NEW TWO-PLANET SYSTEM AROUND THE STAR HD 207832
- Physics, Geology
- 2012
Keck/HIRES precision radial velocities of HD 207832 indicate the presence of two Jovian-type planetary companions in Keplerian orbits around this G star. The planets have minimum masses of Msin i =…
A PLANETARY SYSTEM AROUND THE NEARBY M DWARF GJ 667C WITH AT LEAST ONE SUPER-EARTH IN ITS HABITABLE ZONE
- Physics, Geology
- 2012
We re-analyze 4 years of HARPS spectra of the nearby M1.5 dwarf GJ 667C available through the European Southern Observatory public archive. The new radial velocity (RV) measurements were obtained…
The SOPHIE search for northern extrasolar planets. III. A Jupiter-mass companion around HD 109246
- Physics, Geology
- 2010
We report the detection of a Jupiter-mass planet discovered with the SOPHIE spectrograph mounted on the 1.93-m telescope at the Haute-Provence Observatory. The new planet orbits HD 109246, a G0V star…
THREE SUPER-EARTHS ORBITING HD 7924
- Physics, Geology
- 2015
We report the discovery of two super-Earth-mass planets orbiting the nearby K0.5 dwarf HD 7924, which was previously known to host one small planet. The new companions have masses of 7.9 and 6.4 M ⨁…
FORMATION, TIDAL EVOLUTION, AND HABITABILITY OF THE KEPLER-186 SYSTEM
- Physics, Geology
- 2014
The Kepler-186 system consists of five planets orbiting an early M dwarf. The planets have physical radii of 1.0–1.50 R⊕ and orbital periods of 4–130 days. The 1.1 R⊕ Kepler-186f with a period of 130…
THE ANGLO-AUSTRALIAN PLANET SEARCH. XX. A SOLITARY ICE-GIANT PLANET ORBITING HD 102365
- Physics, Geology
- 2011
We present 12 years of precision Doppler data for the very nearby G3 star HD 102365, which reveals the presence of a Neptune-like planet with a 16.0 MEarth minimum mass in a 122.1 day orbit. Very few…
The HARPS search for southern extra-solar planets - XXXI. The M-dwarf sample
- Physics, Geology
- 2011
Searching for planets around stars with different masses helps us to assess the outcome of planetary formation for different initial conditions. The low-mass M dwarfs are also the most frequent stars…
The HARPS-N Rocky Planet Search. I. HD 219134 b: A transiting rocky planet in a multi-planet system at 6.5 pc from the Sun
- Physics, Geology
- 2015
We present here the detection of a system of four low-mass planets around the bright (V=5.5) and close-by (6.5 pc) star HD219134. This is the first result of the Rocky Planet Search program with…
References
SHOWING 1-10 OF 88 REFERENCES
An extrasolar planetary system with three Neptune-mass planets
- Physics, GeologyNature
- 2006
Simulations show that the system of three Neptune-mass planets orbiting the nearby star HD 69830 is in a dynamically stable configuration and theoretical calculations favour a mainly rocky composition for both inner planets, while the outer planet probably has a significant gaseous envelope surrounding its rocky/icy core.
A Neptune-Mass Planet Orbiting the Nearby M Dwarf GJ 436
- Physics, Geology
- 2004
We report precise Doppler measurements of GJ 436 (M2.5 V) obtained at Keck Observatory. The velocities reveal a planetary companion with orbital period of 2.644 days, eccentricity of 0.12 (consistent…
A Long‐Period Jupiter‐Mass Planet Orbiting the Nearby M Dwarf GJ 849
- Physics, Geology
- 2006
We report precise Doppler measurements of GJ 849 (M3.5 V) that reveal the presence of a planet with a minimum mass of 0.82MJup in a 5.16 yr orbit. At a = 2.35 AU, GJ 849b is the first…
The HARPS search for southern extra-solar planets - XXXI. The M-dwarf sample
- Physics, Geology
- 2011
Searching for planets around stars with different masses helps us to assess the outcome of planetary formation for different initial conditions. The low-mass M dwarfs are also the most frequent stars…
A JUPITER-LIKE PLANET ORBITING THE NEARBY M DWARF GJ 832
- Physics, Geology
- 2008
Precision Doppler velocity measurements from the Anglo-Australian Telescope reveal a planet with a 9.4 ± 0.4 year period orbiting the M1.5 dwarf GJ 832. Within measurement uncertainty the orbit is…
A ~7.5 M⊕ Planet Orbiting the Nearby Star, GJ 876
- Physics, Geology
- 2005
High-precision, high-cadence radial velocity monitoring over the past 8 yr at the W. M. Keck Observatory reveals evidence for a third planet orbiting the nearby (4.69 pc) dM4 star GJ 876. The…
A New Planet around an M Dwarf: Revealing a Correlation between Exoplanets and Stellar Mass
- Physics, Geology
- 2007
We report precise Doppler measurements of GJ 317 (M3.5 V) that reveal the presence of a planet with a minimum mass MP sin i = 1.2 MJup in an eccentric, 692.9 day orbit. GJ 317 is only the third M…
THE NASA-UC ETA-EARTH PROGRAM. I. A SUPER-EARTH ORBITING HD 7924
- Physics, Geology
- 2009
We report the discovery of the first low-mass planet to emerge from the NASA-UC Eta-Earth Program, a super-Earth orbiting the K0 dwarf HD 7924. Keplerian modeling of precise Doppler radial velocities…
A Pair of Resonant Planets Orbiting GJ 876
- Physics, Geology
- 2001
Precise Doppler measurements during 6 yr from the Lick and Keck observatories reveal two planets orbiting GJ 876 (M4V). The orbital fit yields companion masses of M sin i = 0.56 and 1.89 MJ, orbital…
A Planetary Companion to a Nearby M4 Dwarf, Gliese 876
- Physics, Geology
- 1998
Doppler measurements of the M4 dwarf star Gliese 876 taken at both Lick and Keck Observatories reveal periodic, Keplerian velocity variations with a period of 61 days. The orbital fit implies that…