A Super-Earth Orbiting the Nearby Sun-like Star HD 1461
Eugenio J. Rivera, R. Paul Butler, Steven S. Vogt, Gregory Laughlin,, Gregory W. Henry, Stefano Meschiari

TL;DR
This paper reports the discovery of a Super-Earth orbiting the nearby star HD 1461 using 12.8 years of radial velocity data, and discusses potential additional planets, their stability, and transit prospects.
Contribution
First detection of a Super-Earth around HD 1461 with extensive long-term radial velocity data and analysis of possible additional planets and their stability.
Findings
Detected a 7.4 Earth-mass planet with a 5.77-day orbit.
Suggested presence of two additional outer planets with low eccentricity.
No transits detected in photometric data, but follow-up needed.
Abstract
We present precision radial velocity data that reveal a Super-Earth mass planet and two probable additional planets orbiting the bright nearby G0V star HD 1461. Our 12.8 years of Keck HIRES precision radial velocities indicate the presence of a 7.4M_Earth planet on a 5.77-day orbit. The data also suggest, but cannot yet confirm, the presence of outer planets on low-eccentricity orbits with periods of 446.1 and 5017 days, and projected masses (M sin i) of 27.9 and 87.1M_Earth, respectively. Test integrations of systems consistent with the radial velocity data suggest that the configuration is dynamically stable. We present a 12.2-year time series of photometric observations of HD 1461, which comprise 799 individual measurements, and indicate that it has excellent long-term photometric stability. However, there are small amplitude variations with periods comparable to those of the…
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