We report the discovery of a super-Earth orbiting the star GJ 536 based on the analysis of the radial-velocity time series from the HARPS and HARPS-N spectrographs. GJ 536 b is a planet with a minimum mass M sin i of 5.36 +- 0.69 Me with an orbital period of 8.7076 +- 0.0025 days at a distance of 0.066610(13) AU, and an orbit that is consistent with circular. The host star is the moderately quiet M1 V star GJ 536, located at 10 pc from the Sun. We find the presence of a second signal at 43 days that we relate to stellar rotation after analysing the time series of Ca II H&K and H alpha spectroscopic indicators and photometric data from the ASAS archive. We find no evidence linking the short period signal to any activity proxy. We also tentatively derived a stellar magnetic cycle of less than 3 years.
@article{arxiv.1611.02122,
title = {A super-Earth orbiting the nearby M-dwarf GJ 536},
author = {A. Suárez Mascareño and J. I. González Hernández and R. Rebolo and N. Astudillo-Defru and X. Bonfils and F. Bouchy and X. Delfosse and T. Forveille and C. Lovis and M. Mayor and F. Murgas and F. Pepe and N. C. Santos and S. Udry and A. Wünsche and S. Velasco},
journal= {arXiv preprint arXiv:1611.02122},
year = {2017}
}