The N2K Consortium. II. A Transiting Hot Saturn Around HD 149026 With a Large Dense Core

Abstract

Doppler measurements from Subaru and Keck have revealed radial velocity variations in the V=8.15, G0IV star HD 149026 consistent with a Saturn-Mass planet in a 2.8766 day orbit. Photometric observations at Fairborn Observatory have detected three complete transit events with depths of 0.003 mag at the predicted times of conjunction. HD 149026 is now the second brightest star with a transiting extrasolar planet. The mass of the star, based on interpolation of stellar evolutionary models, is 1.3 +/- 0.1 solar masses; together with the Doppler amplitude, K=43.3 m s^-1, we derive a planet mass Msin(i)=0.36 Mjup, and orbital radius of 0.042 AU. HD 149026 is chromospherically inactive and metal-rich with spectroscopically derived [Fe/H]=+0.36, Teff=6147 K, log g=4.26 and vsin(i)=6.0 km s^-1. Based on Teff and the stellar luminosity of 2.72 Lsun, we derive a stellar radius of 1.45 Rsun. Modeling of the three photometric transits provides an orbital inclination of 85.3 +/- 1.0 degrees and (including the uncertainty in the stellar radius) a planet radius of 0.725 +/- 0.05 Rjup. Models for this planet mass and radius suggest the presence of a ~67 Mearth core composed of elements heavier than hydrogen and helium. This substantial planet core would be difficult to construct by gravitational instability.

25 pages, 5 figures, accepted by the Astrophysical Journal

References in corpus (31)

• Evolutionary tracks and isochrones for low- and intermediate-mass stars: from 0.15 to 7 M_sun, and from Z=0.0004 to 0.03
• Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945
• Detection of Planetary Transits Across a Sun-like Star
• Spectroscopic [Fe/H] for 98 extra-solar planet-host stars: Exploring the probability of planet formation
• No planet for HD 166435
• Models of Giant Planet formation with migration and disc evolution
• HST Time-Series Photometry of the Transiting Planet of HD 209458
• Theory of Low-Mass Stars and Substellar Objects
• The formation and retention of gas giant planets around stars with a range of metallicities
• The Interiors of Giant Planets: Models and Outstanding Questions
• A Neptune-Mass Planet Orbiting the Nearby M Dwarf GJ 436
• The metal-rich nature of stars with planets
• TrES-1: The Transiting Planet of a Bright K0V Star
• Giant Planets at Small Orbital Distances
• Evolution of "51Peg b-like" Planets
• Detection of a NEPTUNE-mass planet in the ${\rho }^1$ Cancri system using the Hobby-Eberly Telescope
• Measurement of Spin-Orbit Alignment in an Extrasolar Planetary System
• Albedo and Reflection Spectra of Extrasolar Giant Planets
• Parent Stars of Extrasolar Planets VI: Abundance Analyses of 20 New Systems
• On the Radii of Extrasolar Giant Planets
• Statistical properties of exoplanets II. Metallicity, orbital parameters, and space velocities
• The CORALIE survey for southern extra-solar planets. XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE
• The HARPS survey for southern extra-solar planets II. A 14 Earth-masses exoplanet around mu Arae
• A Theory for the Radius of the Transiting Giant Planet HD 209458b
• Searching for Planets in the Hyades III: The Quest for Short-Period Planets
• On the Nature of Stars with Planets
• A new Search for Carbon Monoxide Absorption in the Transmission Spectrum of the Extrasolar Planet HD 209458b
• The evolution of irradiated planets. Application to transits
• System Parameters of the Transiting Extrasolar Planet HD 209458b
• Theoretical Radii of Transiting Giant Planets: The Case of OGLE-TR-56b
• Detection of Intermediate-Period Transiting Planets with a Network of Small Telescopes: transitsearch.org

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