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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

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

Revista

Título: Astronomy and Astrophysics

Vol. 612

Página Final: A41

ISSN: 0004-6361

Editora: EDP Sciences

Indexação

ISI Web of Knowledge - 6 Citações

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 16