GJ1061 is a very nearby M star hosting three low-mass temperate planets detected from radial velocity variations. The close to 4:2:1 period commensurability of the planets, the available long-term monitoring of the system and new very high-precision radial velocity measurements from ESPRESSO enable the determination of masses from the planet-planet interaction. Using nested sampling, we derived parameter distributions for a co-planar configuration. The three planets (Mb =1.07 +- 0.11M_Earth, Pb =3.2073 +- 0.0003 d, Mc=1.76 +- 0.13M_Earth, Pc=6.6821 +- 0.0008 d, Md =1.55 +- 0.17M_Earth, Pd =13.066 +- 0.002 d) are potentially all rocky with equilibrium temperatures between 360 K and 240 K. This makes the GJ1061 system one of the prime targets for future ground or space based instruments suitable for a direct detection of the planetary atmospheres.
@article{arxiv.2504.10926,
title = {RedDots: Planetary masses in the GJ1061 system from planet-planet interaction},
author = {S. Dreizler and S. V. Jeffers and F. Liebing and P. Gorrini and C. A. Haswell and E. Gaidos and J. R. Barnes and F. Del Sordo and H. R. A. Jones and E. Rodríguez and Y. Tsapras},
journal= {arXiv preprint arXiv:2504.10926},
year = {2025}
}
Comments
Astronomy and Astrophysics, accepted; 10 Pages, 7 Figures plus Appendix