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Stellar activity analysis of Barnard's Star: Very slow rotation and evidence for long-term activity cycle
B. Toledo-Padrón, J. I. González Hernández, C. Rodríguez-López +58
The search for Earth-like planets around late-type stars using ultra-stable spectrographs requires a very precise characterization of the stellar activity and the magnetic cycle of…
A candidate super-Earth planet orbiting near the snow line of Barnard's star
I. Ribas, M. Tuomi, A. Reiners +60
At a distance of 1.8 parsecs, Barnard's star (Gl 699) is a red dwarf with the largest apparent motion of any known stellar object. It is the closest single star to the Sun, second…
Minimizing the bias in exoplanet detection - application to radial velocities of LHS 1140
Fabo Feng, Mikko Tuomi, Hugh R. A. Jones
A rocky planet orbiting LHS 1140 with a period of 24.7d has been found based on the discovery of transits in its light and high precision radial velocity data (Dittmann et al. 2017…
Detection of the closest Jovian exoplanet in the Epsilon Indi triple system
Fabo Feng, Mikko Tuomi, Hugh R. A. Jones
We confirm the trend in the radial velocity data for Epsilon Indi A suggesting a long-period planetary companion and find significant curvature is present, sufficient to quantify E…
AD Leonis: Radial velocity signal of stellar rotation or spin-orbit resonance?
Mikko Tuomi, Hugh R. A. Jones, Guillem Anglada-Escudé +3
AD Leonis is a nearby magnetically active M dwarf. We find Doppler variability with a period of 2.23 days as well as photometric signals: (1) a short period signal which is similar…
An improved quantification of HD 147379 b
Fabo Feng, Hugh R. A. Jones, Mikko Tuomi
We reanalyze the CARMENES and HIRES/KECK radial velocity data for HD 147379, and also analyze the SOPHIE data using the Agatha software in combination with MCMC posterior sampling.…