Five Planets Orbiting 55 Cancri

@article{Fischer2008FivePO,
  title={Five Planets Orbiting 55 Cancri},
  author={Debra A. Fischer and Geoffrey W. Marcy and R. Paul Butler and Steven S. Vogt and Gregory Laughlin and Gregory W. Henry and David Abouav and Kathryn M. G. Peek and Jason T. Wright and John Asher Johnson and Chris McCarthy and Howard T. Isaacson},
  journal={The Astrophysical Journal},
  year={2008},
  volume={675},
  pages={790-801}
}
Wereport18yearsof Dopplershiftmeasurementsof anearbystar,55Cancri,thatexhibitsstrongevidenceforfive orbiting planets. The four previously reported planets are strongly confirmed here. Afifth planet is presented, with an apparent orbital period of 260 days, placing it 0.78 AU from the star in the large empty zone between two other planets. The velocity wobble amplitude of 4.9 m s � 1 implies a minimum planet massM sini ¼ 45:7 M� . The orbital eccentricity is consistent with a circular orbit, but… Expand
A fourth planet orbiting υ Andromedae
We present a 4-planet Keplerian fit for the radial velocity curve of the F8V star υ Andromeda, indicating the presence of a fourth planet in the system. We detect an additional fifth coherent signalExpand
A DYNAMICAL PERSPECTIVE ON ADDITIONAL PLANETS IN 55 CANCRI
Five planets are known to orbit the star 55 Cancri. The recently discovered planet f at 0.78 AU (Fischer et al.) is located at the inner edge of a previously identified stable zone that separates theExpand
Exoplanet properties from Lick, Keck and AAT
Doppler-shift measurements with a remarkable precision of Δλ/λ=3×10−9, corresponding to velocities of 1 m s−1, have been made repeatedly of 2500 stars located within 300 light years. The observedExpand
A Third Planet Orbiting HIP 14810
We present new precision radial velocities and a three-planet Keplerian orbit fit for the V = 8.5, G5 V star HIP 14810. We began observing this star at Keck Observatory as part of the N2K PlanetExpand
THE SUCCESSFUL PREDICTION OF THE EXTRASOLAR PLANET HD 74156d
Most of the first-discovered extrasolar multiplanet systems were found to lie close to dynamically unstable configurations. However, a few observed multiplanet systems (e.g., HD 74156) did not showExpand
The Anglo-Australian planet search. XX. A solitary ice-giant planet orbiting HD 102365
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 M Earth minimum mass in a 122.1 day orbit. VeryExpand
HD 5388 b is a 69 MJup companion instead of a planet
We examined six exoplanet host stars with non-standard Hipparcos astrometric solution, which may be indicative of unrecognised orbital motion. Using Hipparcos intermediate astrometric data, weExpand
Possible Disintegrating Short-period Super-Mercury Orbiting KIC 12557548
We report on the discovery of stellar occultations, observed with Kepler, which recur periodically at 15.685 hr intervals, but which vary in depth from a maximum of 1.3% to a minimum that can be lessExpand
Dynamics of a Probable Earth-mass Planet in the GJ 832 System
The stability of planetary orbits around the GJ 832 star system, which contains inner (GJ 832c) and outer (GJ 832b) planets, is investigated numerically and a detailed phase-space analysis isExpand
Ultra-short-period Planets from Secular Chaos
Over a hundred rocky planets orbiting Sun-like stars in very short orbital periods (<1 day) have been discovered by the Kepler mission. These planets, known as ultra-short-period (USP) planets, areExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 57 REFERENCES
A Neptune-Mass Planet Orbiting the Nearby M Dwarf GJ 436
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 (consistentExpand
A Planet at 5 AU around 55 Cancri
We report precise Doppler-shift measurements of 55 Cancri (G8 V) obtained from 1989 to 2002 at Lick Observatory. The velocities reveal evidence for an outer planetary companion to 55 Cancri orbitingExpand
Three New “51 Pegasi-Type” Planets*
We report Keplerian Doppler velocity variations, consistent with orbiting "51 Pegasi-type" planets, for the three stars HR 3522 (G8V), HR 5185 (F7V), and HR 458 (F8V). HR 3522 exhibits a velocityExpand
Predictions for the frequency and orbital radii of massive extrasolar planets
We investigate the migration of massive extrasolar planets caused by gravitational interaction with a viscous protoplanetary disc. We show that a model in which planets form at 5 au at a constantExpand
Radial Velocity Detectability of Low-Mass Extrasolar Planets in Close Orbits
Detection of Jupiter-mass companions to nearby solar-type stars with precise radial velocity measurements is now routine, and Doppler surveys are moving toward lower velocity amplitudes. TheExpand
The HARPS survey for southern extra-solar planets. II. A 14 Earth-masses exoplanet around μ Arae
In this letter we present the discovery of a very light planetary companion to the star mu Ara (HD160691). The planet orbits its host once every 9.5days, and induces a sinusoidal radial velocityExpand
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. TheExpand
Evidence for Multiple Companions to υ Andromedae
The bright F8 V star t Andromedae was previously reported to have a 4.6 day Doppler velocity periodicity, consistent with having a Jupiter-mass companion orbiting at 0.059 AU. Follow-up obser-Expand
Statistical properties of exoplanets. III. Planet properties and stellar multiplicity
Among the hundred or so extrasolar planets discovered to date, 19 are orbiting a component of a double or multiple star system. In this paper, we discuss the properties of these planets and compareExpand
The N2K Consortium. II. A Transiting Hot Saturn around HD 149026 with a Large Dense Core
Doppler measurements from Subaru and Keck have revealed radial velocity variations in the V = 8.15, G0 IV star HD 149026 consistent with a Saturn-mass planet in a 2.8766 day orbit. PhotometricExpand
...
1
2
3
4
5
...