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  A view into the core of α Cen A

Bazot, M., Christensen-Dalsgaard, J., Benomar, O., & Gizon, L. (2017). A view into the core of α Cen A. In EPJ Web of Conferences: Seismology of the Sun and the Distant Stars 2016 – Using Today’s Successes to Prepare the Future. doi:10.1051/epjconf/201716003006.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-4199-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-419A-8
Genre: Conference Paper

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 Creators:
Bazot, Michaël, Author
Christensen-Dalsgaard, Jørgen, Author
Benomar, Othman, Author
Gizon, Laurent1, Author              
Affiliations:
1Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832287              

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 Abstract: We present results of modelling of α Cen A. In order to estimate the physical parameters of this star, we modelled spectroscopic, interferometric, astrometric and asteroseismic data. To that effect we chose to use a Bayesian approach to parameter estimation, which allowed us, in particular, to define our prior knowledge on the parameters. An important question we wanted to address was to assess whether or not α Cen A has a convective core. We found that the data we used give indecisive results on this issue. If the star has a convective core, and provided that overshooting is taken into account, there is a possibility for the star to be in the peculiar state in which the ppII chain is the main driver of nuclear energy generation. We also found a non-negligible probability for α Cen A to be a very early subgiant.

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Language(s): eng - English
 Dates: 2018-05-072017
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1051/epjconf/201716003006
 Degree: -

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Title: TASC2 & KASC9 Workshop – SPACEINN & HELAS8 Conference
Place of Event: Açores Islands, Portugal
Start-/End Date: 2016-07-11 - 2016-07-15

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Title: EPJ Web of Conferences: Seismology of the Sun and the Distant Stars 2016 – Using Today’s Successes to Prepare the Future
Source Genre: Proceedings
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 160 Sequence Number: 03006 Start / End Page: - Identifier: -