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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 withExpand
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Five Intermediate-Period Planets from the N2K Sample
We report the detection of five Jovian-mass planets orbiting high-metallicity stars. Four of these stars were first observed as part of the N2K program, and exhibited low rms velocity scatter afterExpand
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On the thermal and magnetic histories of Earth and Venus: Influences of melting, radioactivity, and conductivity
Abstract The study of the thermal evolution of Earth’s interior is uncertain and controversial in many respects, from the interpretation of petrologic observations used to infer the temperature andExpand
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Simulating 2 Ga of geodynamo history
The paleomagnetic record indicates the geodynamo has been active over much of Earth history with surprisingly little trend in paleointensity. Variability, however, is expected from models thatExpand
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TWO JOVIAN-MASS PLANETS IN EARTHLIKE ORBITS
We report the discovery of two new planets: a 1.94 M_(Jup) planet in a 1.8 yr orbit of HD 5319, and a 2.51 M_(Jup) planet in a 1.1 yr orbit of HD 75898. The measured eccentricities are 0.12 for HDExpand
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Geodynamo reversal frequency and heterogeneous core–mantle boundary heat flow
Abstract We analyze more than two hundred and forty magnetic polarity reversals and excursions over forty million years of time from numerical dynamos with heterogeneous boundary heat flux.Expand
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Divergent evolution of Earth and Venus: Influence of degassing, tectonics, and magnetic fields
Knowledge of the earliest evolution of Earth and Venus is extremely limited, but it is obvious from their dramatic contrasts today that at some point in their evolution conditions on the two planetsExpand
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The N2K Consortium. I. A Hot Saturn Planet Orbiting HD 88133
The N2K ("next 2000") consortium is carrying out a distributed observing campaign with the Keck, Magellan, and Subaru telescopes, as well as the automatic photometric telescopes of FairbornExpand
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Optimal dynamos in the cores of terrestrial exoplanets: Magnetic field generation and detectability
Abstract A potentially promising way to gain knowledge about the internal dynamics of extrasolar planets is by remote measurement of an intrinsic magnetic field. Strong planetary magnetic fields,Expand
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From superchrons to secular variation: A broadband dynamo frequency spectrum for the geomagnetic dipole
Abstract We build a broadband frequency spectrum for geomagnetic dipole intensity variations originating in the core using results from numerical dynamos. Scaling dipole intensity spectra fromExpand
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