| Issue |
A&A
Volume 698, June 2025
|
|
|---|---|---|
| Article Number | A114 | |
| Number of page(s) | 16 | |
| Section | Planets, planetary systems, and small bodies | |
| DOI | https://doi.org/10.1051/0004-6361/202452490 | |
| Published online | 06 June 2025 | |
RedDots: Panetary masses in the GJ 1061 system from planet-planet interaction★
1
Institut für Astrophysik, Georg-August-Universität,
Friedrich-Hund-Platz 1,
37077
Göttingen,
Germany
2
Thüringer Landessternwarte Tautenburg,
Sternwarte 5,
07778
Tautenburg,
Germany
3
Gesundbrunnen 6a,
37079
Göttingen,
Germany
4
Department of Physics and Astronomy, The Open University, Walton Hall,
Milton Keynes
MK7 6AA,
UK
5
Department of Earth Sciences, University of Hawai’i at Mänoa,
1680 East-West Road,
Honolulu,
HI
96822,
USA
6
Institut für Astrophysik, Universität Wien,
Türkenschanzstraße 17,
1180
Wien,
Austria
7
Institute of Space Sciences (ICE-CSIC), Campus UAB, Carrer de Can Magrans s/n,
08193
Barcelona,
Spain
8
Institut d’Estudis Espacials de Catalunya (IEEC),
08034
Barcelona,
Spain
9
INAF, Osservatorio Astrofisico di Catania,
via Santa Sofia, 78
Catania,
Italy
10
Physics, Astronomy and Mathematics, University of Hertfordshire, College Lane,
Hatfield
AL10 9AB,
UK
11
Instituto de Astrofísica de Andalucía (IAA-CSIC); Glorieta de la Astronomía, s/n ;
18008
Granada,
Spain
12
Zentrum für Astronomie der Universität Heidelberg, Astronomisches Rechen-Institut,
Mönchhofstr. 12-14,
69120
Heidelberg,
Germany
★★ Corresponding author: dreizler@astro.physik.unigoettingen.de
Received:
4
October
2024
Accepted:
21
March
2025
GJ 1061 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 ± 0.11 M⊕, Pb=3.2073 ± 0.0003 d; Mc=1.76 ± 0.13 M⊕, Pc = 6.6821 ± 0.0008 d; and Md=1.55 ± 0.17 M⊕, Pd=13.066 ± 0.002 d) are potentially all rocky with equilibrium temperatures between 360 and 240 K. This makes the GJ 1061 system one of the prime targets for future ground- or space-based instruments suitable for a direct detection of the planetary atmospheres.
Key words: planets and satellites: detection / planets and satellites: fundamental parameters / planets and satellites: terrestrial planets / planets and satellites: individual: GJ1061 bcd / planetary systems / stars: individual: GJ1061
© The Authors 2025
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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