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  Model-independent Measurement of Internal Stellar Structure in 16 Cygni A and B

Bellinger, E. P., Basu, S., Hekker, S., & Ball, W. H. (2017). Model-independent Measurement of Internal Stellar Structure in 16 Cygni A and B. The Astrophysical Journal, 851(2): 80. doi:10.3847/1538-4357/aa9848.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-5FF4-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-02BC-6
Genre: Journal Article

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 Creators:
Bellinger, Earl P.1, Author              
Basu, Sarbani, Author
Hekker, Saskia1, Author              
Ball, Warrick H., Author
Affiliations:
1Max Planck Research Group in Stellar Ages and Galactic Evolution (SAGE), Max Planck Institute for Solar System Research, Max Planck Society, ou_2265636              

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 Abstract: We present a method for measuring internal stellar structure based on asteroseismology that we call "inversions for agreement." The method accounts for imprecise estimates of stellar mass and radius as well as the relatively limited oscillation mode sets that are available for distant stars. By construction, the results of the method are independent of stellar models. We apply this method to measure the isothermal sound speeds in the cores of the solar-type stars 16 Cyg A and B using asteroseismic data obtained from Kepler observations. We compare the asteroseismic structure that we deduce against best-fitting evolutionary models and find that the sound speeds in the cores of these stars exceed those of the models.

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Language(s): eng - English
 Dates: 2018-02-022017
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.3847/1538-4357/aa9848
 Degree: -

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Title: The Astrophysical Journal
Source Genre: Journal
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Publ. Info: Bristol; Vienna : IOP Publishing; IAEA
Pages: - Volume / Issue: 851 (2) Sequence Number: 80 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215_3