A Planet with a 3.1 Day Period around a Solar Twin
Open Access
- 1 December 1998
- journal article
- research article
- Published by IOP Publishing in Publications of the Astronomical Society of the Pacific
- Vol. 110 (754) , 1389-1393
- https://doi.org/10.1086/316287
Abstract
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 MJUP/sin i, 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.Keywords
This publication has 24 references indexed in Scilit:
- Modeling the Diversity of Outer Planetary SystemsThe Astronomical Journal, 1998
- A Search for Line Shape and Depth Variations in 51 Pegasi and τ BootisThe Astrophysical Journal, 1998
- Further evidence for the planet around 51 PegasiNature, 1998
- A planetary companion for 51 Pegasi implied by absence of pulsations in the stellar spectraNature, 1998
- The Discovery of a Planetary Companion to 16 Cygni BThe Astrophysical Journal, 1997
- Absence of a planetary signature in the spectra of the star 51 PegasiNature, 1997
- Three New “51 Pegasi–Type” PlanetsThe Astrophysical Journal, 1997
- Attaining Doppler Precision of 3 M s-1Publications of the Astronomical Society of the Pacific, 1996
- Comparing the Sun with other stars along the temperature coordinatePublications of the Astronomical Society of the Pacific, 1995
- Proximity of Jupiter-Like Planets to Low-Mass StarsScience, 1995