A Planet with a 3.1 Day Period around a Solar Twin

Details A Planet with a 3.1 Day Period around a Solar Twin A Planet with a 3.1 Day Period around a Solar Twin

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998pasp..110.1389b&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 110, Issue 754, pp. 1389-1393.

Astronomy and Astrophysics

Astronomy

58

Stars: Planetary Systems, Stars: Individual: Henry Draper Number: Hd 187123, Research Notes

Scientific paper

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^-1. An orbital fit yields a companion mass of M=0.52 M_JUP/ sini, a semimajor axis of a=0.042 AU, and an eccentricity of e=0.03 (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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