The Jupiter Twin HD 154345b

Abstract

We announce the discovery of a twin of Jupiter orbiting the slightly metal-poor ([Fe/H] = -0.1) nearby (d = 18 pc) G8 dwarf HD 154345. This planet has a minimum mass of 0.95 Jupiter masses and a 9.2 year, circular orbit with radius 4.2 AU. There is currently little or no evidence for other planets in the system, but smaller or exterior planets cannot yet be ruled out. We also detect a ~ 9-year activity cycle in this star photometrically and in chromospheric emission. We rule out activity cycles as the source of the radial velocity variations by comparison with other cycling late-G dwarfs.

15pp. ApJL. v2: Substantial additions, including 3 new authors, new photometry, activity measurements, and a discussion of activity cycles

References in corpus (7)

• Catalog of Nearby Exoplanets
• Chromospheric CaII Emission in Nearby F, G, K, and M stars
• Radial Velocity Jitter in Stars from the California and Carnegie Planet Search at Keck Observatory
• Five Planets Orbiting 55 Cancri
• Patterns of photometric and chromospheric variation among Sun-like stars: A 20-year perspective
• A Planet at 5 AU Around 55 Cancri
• Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars

Cited by in corpus (47)

• The Occurrence and Mass Distribution of Close-in Super-Earths, Neptunes, and Jupiters
• The LCES HIRES/Keck Precision Radial Velocity Exoplanet Survey
• The California Planet Survey I. Four New Giant Exoplanets
• Limits on Planetary Companions from Doppler Surveys of Nearby Stars
• Long-term magnetic activity of a sample of M-dwarf stars from the HARPS program I. Comparison of activity indices
• Statistics of Long Period Gas Giant Planets in Known Planetary Systems
• Masses and Orbital Constraints for the OGLE-2006-BLG-109Lb,c Jupiter/Saturn Analog Planetary System
• Planetary detection limits taking into account stellar noise. II. Effect of stellar spot groups on radial-velocities
• The HARPS search for southern extra-solar planets. XXX. Planetary systems around stars with solar-like magnetic cycles and short-term activity variation
• Mass constraints on substellar companion candidates from the re-reduced Hipparcos intermediate astrometric data: Nine confirmed planets and two confirmed brown dwarfs
• Explorations Beyond the Snow Line: Spitzer/IRS Spectra of Debris Disks Around Solar-Type Stars
• Does the presence of planets affect the frequency and properties of extrasolar Kuiper Belts? Results from the Herschel DEBRIS and DUNES surveys
• Far-Ultraviolet Activity Levels of F, G, K, and M dwarf Exoplanet Host Stars
• Do stellar magnetic cycles influence the measurement of precise radial velocities?
• The planet search programme at the ESO CES and HARPS. IV. The search for Jupiter analogues around solar-like stars
• The California Planet Survey IV: A Planet Orbiting the Giant Star HD 145934 and Updates to Seven Systems with Long-Period Planets
• The Discovery of HD 37605c and a Dispositive Null Detection of Transits of HD 37605b
• Starspot-induced optical and infrared radial velocity variability in T Tauri star Hubble 4
• Correlations between the stellar, planetary and debris components of exoplanet systems observed by $\text{Herschel}$
• The SOPHIE search for northern extrasolar planets. V. Follow-up of ELODIE candidates: Jupiter-analogs around Sun-like stars
• Two Exoplanets Discovered at Keck Observatory
• Rotation periods of exoplanet host stars
• Astrophysical Insights into Radial Velocity Jitter from an Analysis of 600 Planet-search Stars
• The Posterior Distribution of sin(i) for Exoplanets with M_T sin(i) Determined from Radial Velocity Data
• Empirical evidences for a planetary modulation of total solar irradiance and the TSI signature of the 1.09-year Earth-Jupiter conjunction cycle
• The Lick-Carnegie Exoplanet Survey: HD32963 -- A New Jupiter Analog Orbiting a Sun-like Star
• Detection of Planetary and Stellar Companions to Neighboring Stars via a Combination of Radial Velocity and Direct Imaging Techniques
• Discussion on the spectral coherence between planetary, solar and climate oscillations: a reply to some critiques
• Stellar Activity and Exclusion of the Outer Planet in the HD 99492 System
• The SOPHIE search for northern extrasolar planets. X. Detection and characterization of giant planets by the dozen
• Planetary harmonics in the historical Hungarian aurora record (1523-1960)
• Ruling Out Possible Secondary Stars to Exoplanet Host Stars Using the CHARA Array
• The first super-Earth Detection from the High Cadence and High Radial Velocity Precision Dharma Planet Survey
• The Solar Twin Planet Search II. A Jupiter twin around a solar twin
• A Third Planet Orbiting HIP 14810
• Detecting the Signatures of Uranus and Neptune
• In the Presence of a Wrecking Ball: Orbital Stability in the HR 5183 System
• Kepler-1656b's Extreme Eccentricity: Signature of a Gentle Giant
• Radial Velocities as an Exoplanet Discovery Method
• Detection and Characterization of Extrasolar Planets through Doppler Spectroscopy
• The complementarity of astrometric and radial velocity exoplanet observations - Determining exoplanet mass with astrometric snapshots
• The California-Kepler Survey. XI. A Survey of Chromospheric Activity Through the Lens of Precise Stellar Properties
• The NEID Earth Twin Survey. II. Dynamical Masses in Seven High-acceleration Star Systems
• Planet formation: key mechanisms and global models
• The California Legacy Survey I. A Catalog of 178 Planets from Precision Radial Velocity Monitoring of 719 Nearby Stars over Three Decades
• Magnetism and activity of planet hosting stars
• Exoplanets: past, present, and future