The RoPES project with HARPS and HARPS-N I. A system of super-Earths orbiting the moderately active K-dwarf HD 176986

• Type: Article in International Scientific Journal
• Date: 2018

Authors

Suarez Mascareno, AS (Author) Other; Gonzalez Hernandez, JIG (Author) Other; Rebolo, R (Author) Other; Velasco, S (Author) Other; Toledo Padron, B (Author) Other; Udry, S (Author) Other; Motalebi, F (Author) Other; Segrasan, D (Author) Other; Wyttenbach, A (Author) Other; Mayor, M (Author) Other; Pepe, F (Author) Other; Lovis, C (Author) Other; N.C. Santos (Author) FCUP; Figueira, P (Author) Other; Esposito, M (Author) Other

Journal

Title: Astronomy and Astrophysics

Vol. 612

Final page: A41

ISSN: 0004-6361

Publisher: EDP Sciences

Indexing

ISI Web of Knowledge - 6 Citations

Other information

Authenticus ID: P-00N-WGA

DOI: 10.1051/0004-6361/201732042

Abstract (EN): We report the discovery of a system of two super-Earths orbiting the moderately active K-dwarf HD 176986. This work is part of the RoPES RV program of G-and K-type stars, which combines radial velocities (RVs) from the HARPS and HARPS-N spectrographs to search for short-period terrestrial planets. HD 176986 b and c are super-Earth planets with masses of 5.74 and 9.18 M-circle plus, orbital periods of 6.49 and 16.82 days, and distances of 0.063 and 0.119AU in orbits that are consistent with circular. The host star is a K2.5 dwarf, and despite its modest level of chromospheric activity (log(10) (R'(HK)) = -4.90 +/- 0.04), it shows a complex activity pattern. Along with the discovery of the planets, we study the magnetic cycle and rotation of the star. HD 176986 proves to be suitable for testing the available RV analysis technique and further our understanding of stellar activity.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 16