Unusual high-frequency oscillations in the Kepler delta Scuti star KIC 4840675

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Balona, LA (Autor) Outra; Breger, M (Autor) Outra; Catanzaro, G (Autor) Outra; Cunha, MS (Autor) FCUP; Handler, G (Autor) Outra; Kolaczkowski, Z (Autor) Outra; Kurtz, DW (Autor) Outra; Murphy, S (Autor) Outra; Niemczura, E (Autor) Outra; Paparo, M (Autor) Outra; Smalley, B (Autor) Outra; Szabo, R (Autor) Outra; Uytterhoeven, K (Autor) Outra; Christiansen, JL (Autor) Outra; Uddin, K (Autor) Outra; Stumpe, MC (Autor) Outra

Revista

Título: Monthly Notices of the Royal Astronomical Society

Vol. 424

Páginas: 1187-1196

ISSN: 0035-8711

Editora: Oxford University Press

Indexação

ISI Web of Knowledge - 8 Citações

Scopus - 7 Citações

Outras Informações

ID Authenticus: P-002-7N5

DOI: 10.1111/j.1365-2966.2012.21295.x

Abstract (EN): We show that the star KIC 4840675 observed by Kepler is composed of three stars with a rapidly rotating A-type star and two solar-type fainter companions. The A-type star is a d Scuti variable with a dominant mode and many other modes of lower amplitude, including several low-frequency variations. The low-frequency variation with highest amplitude can be interpreted as rotational modulation with the light curve changing with time. However, the most interesting aspect of this star is a triplet of independent modes in the range 118129 d-1 (1.41.5 mHz), which is far outside the range of typical d Scuti frequencies. We discuss the possibility that these modes could be solar-like oscillations, oscillations of the roAp type or due to an unseen pulsating compact companion.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10