A Planet with a 3.1 Day Period around a Solar Twin
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چکیده
Doppler measurements from the Keck/HIRES spectrometer of the G3 V star HD 187123 reveal Keplerian variations with a period of 3.097 days and a semiamplitude of 72 m s. An orbital fit yields a companion mass of , a semimajor axis of AU, and an eccentricity of M 5 0.52 M / sin i a 5 0.042 e 5 0.03 JUP (consistent with zero). HD 187123 appears similar to the Sun in mass, age, chromosphere, and rotation rate. Although unlikely, non-Keplerian explanations for the Doppler variations, such as spots and pulsation, cannot be ruled out and require future photometry and spectroscopy.
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تاریخ انتشار 1998