FIVE LONG-PERIOD EXTRASOLAR PLANETS IN ECCENTRIC ORBITS FROM THE MAGELLAN PLANET SEARCH PROGRAM

@article{Arriagada2010FIVELE,
  title={FIVE LONG-PERIOD EXTRASOLAR PLANETS IN ECCENTRIC ORBITS FROM THE MAGELLAN PLANET SEARCH PROGRAM},
  author={Pamela Arriagada and R. Paul Butler and Dante Minniti and Mercedes L{\'o}pez-Morales and Stephen A. Shectman and Fred C. Adams and Alan P. Boss and John E. Chambers},
  journal={The Astrophysical Journal},
  year={2010},
  volume={711},
  pages={1229 - 1235}
}
Five new planets orbiting G and K dwarfs have emerged from the Magellan velocity survey. These companions are Jovian-mass planets in eccentric (e ⩾ 0.24) intermediate- and long-period orbits. HD 86226b orbits a solar metallicity G2 dwarf. The MPsin i mass of the planet is 1.5 MJUP, the semimajor axis is 2.6 AU, and the eccentricity is 0.73. HD 129445b orbits a metal-rich G6 dwarf. The minimum mass of the planet is MPsin i = 1.6 MJUP, the semimajor axis is 2.9 AU, and the eccentricity is 0.70… 
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14 Citations
Background Citations
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Methods Citations
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14 Citations

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References

SHOWING 1-10 OF 48 REFERENCES
TWO JUPITER-MASS PLANETS ORBITING HD 154672 AND HD 205739
We report the detection of the first two planets from the N2K Doppler planet search program at the Magellan telescopes. The first planet has a mass of Msin i = 4.96 MJup and orbits the G3 IV star HD…
Retired A Stars and Their Companions: Exoplanets Orbiting Three Intermediate-Mass Subgiants
We report precision Doppler measurements of three intermediate-mass subgiants obtained at Lick and Keck Observatories. All three stars show variability in their radial velocities consistent with…
Eccentricity versus Mass for Low-Mass Secondaries and Planets
Spectroscopic orbits have been reported for six unseen companions orbiting solar-type stars with minimum possible masses in the range 0.5-10 Jupiter masses. The four least massive companions, around…
A SUPER-EARTH ORBITING THE NEARBY SUN-LIKE STAR HD 1461
We present precision radial velocity (RV) data that reveal a Super-Earth mass planet and two probable additional planets orbiting the bright nearby G0V star HD 1461. Our 12.8 years of Keck High…
LOW-MASS COMPANIONS FOR FIVE SOLAR-TYPE STARS FROM THE MAGELLAN PLANET SEARCH PROGRAM
We report low-mass companions orbiting five solar-type stars that have emerged from the Magellan precision Doppler velocity survey, with minimum (Msin i) masses ranging from 1.2 to 25 MJUP. These…
A SUPER-EARTH AND TWO NEPTUNES ORBITING THE NEARBY SUN-LIKE STAR 61 VIRGINIS
We present precision radial velocity data that reveal a multiple exoplanet system orbiting the bright nearby G5V star 61 Virginis. Our 4.6 years of combined Keck/HIRES and Anglo-Australian Telescope…
Five New Extrasolar Planets
We report multiple Doppler measurements of five nearby FGK main-sequence stars and subgiants obtained during the past 4-6 yr at the Keck Observatory. These stars, namely, HD 183263, HD 117207, HD…
A ~7.5 M⊕ Planet Orbiting the Nearby Star, GJ 876
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…
Evolution of Giant Planets in Eccentric Disks
We investigate the interaction between a giant planet and a viscous circumstellar disk by means of high-resolution, two-dimensional hydrodynamic simulations. We consider planetary masses that range…
Chaotic variations in the eccentricity of the planet orbiting 16 Cygni B
The planet recently discovered1 orbiting the star 16 Cyg B has the largest eccentricity (e= 0.67) of any known planet. Planets that form in circumstellar disks are expected to have nearly circular…
...
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