Bibcode
White, T. R.; Benomar, O.; Silva Aguirre, V.; Ball, W. H.; Bedding, T. R.; Chaplin, W. J.; Christensen-Dalsgaard, J.; Garcia, R. A.; Gizon, L.; Stello, D.; Aigrain, S.; Antia, H. M.; Appourchaux, T.; Bazot, M.; Campante, T. L.; Creevey, O. L.; Davies, G. R.; Elsworth, Y. P.; Gaulme, P.; Handberg, R.; Hekker, S.; Houdek, G.; Howe, R.; Huber, D.; Karoff, C.; Marques, J. P.; Mathur, S.; McQuillan, A.; Metcalfe, T. S.; Mosser, B.; Nielsen, M. B.; Régulo, C.; Salabert, D.; Stahn, T.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 601, id.A82, 16 pp.
Fecha de publicación:
5
2017
Revista
Número de citas
37
Número de citas referidas
34
Descripción
Binary star systems are important for understanding stellar structure
and evolution, and are especially useful when oscillations can be
detected and analysed with asteroseismology. However, only four systems
are known in which solar-like oscillations are detected in both
components. Here, we analyse the fifth such system, HD 176465, which was
observed by Kepler. We carefully analysed the system's power spectrum to
measure individual mode frequencies, adapting our methods where
necessary to accommodate the fact that both stars oscillate in a similar
frequency range. We also modelled the two stars independently by fitting
stellar models to the frequencies and complementaryparameters. We are
able to cleanly separate the oscillation modes in both systems. The
stellar models produce compatible ages and initial compositions for the
stars, as is expected from their common and contemporaneous origin.
Combining the individual ages, the system is about 3.0 ± 0.5 Gyr
old. The two components of HD 176465 are young physically-similar
oscillating solar analogues, the first such system to be found, and
provide important constraints for stellar evolution and
asteroseismology.
Proyectos relacionados
Sismología Solar y Estelar y Búsqueda de Exoplanetas
Los objetivos principales de este proyecto son: 1) estudiar la estructura y la dinámica del interior solar, 2) ampliar este estudio a otros tipos de estrellas y 3) buqueda de planetas extrasolares utilizando métodos fotométricos y su caracterización con información complementaria (espectrometría). Para alcanzar el primer objetivo, utilizamos la
Savita
Mathur