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Communication Dans Un Congrès Année : 2017

Asteroseismic modelling of the Binary HD 176465

Résumé

The detection and analysis of oscillations in binary star systems is critical in understanding stellar structure and evolution. This is because such systems have the same initial chemical composition and age. Solar-like" oscillations have been detected in both components of the asteroseismic binary HD 176465 by Kepler. This study presents an independent modelling of the two stars in this binary system. Stellar models generated using MESA (Modules for Experiment in Stellar Astrophysics) were fitted to both the observed individual frequencies and some spectroscopic parameters. The individual theoretical oscillation frequencies for the corresponding stellar models were obtained using GYRE as the pulsation code. A Bayesian approach was applied to find the Probability Distribution Functions of the stellar parameters using AIMS (Asteroseismic Inference on Massive Scale) as the optimization code. The ages of HD 176465 A and HD 176465 B were found to be 2.81 +/- 0.48 Gyrs and 2.52 +/- 0.80 Gyrs respectively. These results are in agreement when compared to previous studies carried out using other asteroseismic modelling techniques and gyrochronology.

Dates et versions

hal-03743974 , version 1 (02-08-2022)

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Citer

B. Nsamba, M. J. P. F. G. Monteiro, Tiago L. Campante, Daniel Reese, Timothy R. White, et al.. Asteroseismic modelling of the Binary HD 176465. Seismology of the Sun and the Distant Stars 2016 : Using Today's Successes to Prepare the Future. Joint TASC2 & KASC9 Workshop - SPACEINN & HELAS8, Jul 2016, Azores Islands, Portugal, Portugal. ⟨hal-03743974⟩
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