RedDots: Planetary Masses In The GJ1061 System From Planet-planet Interaction

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 The three planets (M_b=1.07±0.11M_⊕, P_b=3.2073±0.0003 d, Mc=1.76±0.13M_⊕, P_c=6.6821 ± 0.0008 d, Md=1.55 ± 0.17M_⊕, P_d=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.

S. Dreizler, S. V. Jeffers, F. Liebing, P. Gorrini, C. A. Haswell, E. Gaidos, J. R. Barnes, F. Del Sordo, H. R. A. Jones, E. Rodríguez, Y. Tsapras

Comments: Astronomy and Astrophysics, accepted; 10 Pages, 7 Figures plus Appendix
Subjects: Earth and Planetary Astrophysics (astro-ph.EP); Solar and Stellar Astrophysics (astro-ph.SR)
Cite as: arXiv:2504.10926 [astro-ph.EP] (or arXiv:2504.10926v1 [astro-ph.EP] for this version)
https://doi.org/10.48550/arXiv.2504.10926
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Submission history
From: Stefan Dreizler
[v1] Tue, 15 Apr 2025 07:12:03 UTC (11,213 KB)
https://arxiv.org/abs/2504.10926
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