Structure and Evolution of Nearby Stars with Planets. I. Short-Period Systems

Abstract

Using the Yale stellar evolution code, we have calculated theoretical models for nearby stars with planetary-mass companions in short-period nearly circular orbits: 51 Pegasi, Tau Bootis, Upsilon Andromedae, Rho Cancri, and Rho Coronae Borealis. We present tables listing key stellar parameters such as mass, radius, age, and size of the convective envelope as a function of the observable parameters (luminosity, effective temperature, and metallicity), as well as the unknown helium fraction. For each star we construct best models based on recently published spectroscopic data and the present understanding of galactic chemical evolution. We discuss our results in the context of planet formation theory, and, in particular, tidal dissipation effects and stellar metallicity enhancements.

48 pages including 13 tables and 5 figures, to appear in ApJ

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• Ten New and Updated Multi-planet Systems, and a Survey of Exoplanetary Systems
• Detection of a NEPTUNE-mass planet in the ${\rho }^1$ Cancri system using the Hobby-Eberly Telescope
• Structure and Evolution of Nearby Stars with Planets II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog
• The Spectroscopic Orbit of the Planetary Companion Transiting HD209458
• Parent Stars of Extrasolar Planets VI: Abundance Analyses of 20 New Systems
• Orbital perturbations on transiting planets: A possible method to measure stellar quadrupoles and to detect Earth-mass planets
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• Dynamical Instabilities in Extrasolar Planetary Systems Containing Two Giant Planets
• The Effect of Tidal Inflation Instability on the Mass and Dynamical Evolution of Extrasolar Planets with Ultra-Short Periods
• An Estimate of the Age Distribution of Terrestrial Planets in the Universe: Quantifying Metallicity as a Selection Effect
• A Planet at 5 AU Around 55 Cancri
• Observable Consequences of Planet Formation Models in Systems with Close-in Terrestrial Planets
• Empirical evidence for tidal evolution in transiting planetary systems
• Extra-Solar Planets
• A New 24 micron Phase Curve for upsilon Andromedae b
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• Abundance differences between components of wide binaries
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• A Sensitive Search for Methane in the Infrared Spectrum of Tau Bootis
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• The Effects of Multiple Companions on the Efficiency of the SIM Planet Searches
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• Migration of giant planets in planetesimal discs
• Distribution of refractory and volatile elements in CoRoT exoplanet host stars
• Extent of pollution in planet-bearing stars
• The impact of pollution on stellar evolution models
• Gravitational waves emitted by extrasolar planetary systems
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• The Sun's Interior Metallicity Constrained by Neutrinos
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