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  Surface effects in solar-like oscillators

Ball, W. H. (2017). Surface effects in solar-like oscillators. 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/201716002001.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-41A3-D Version Permalink: http://hdl.handle.net/21.11116/0000-0001-41A4-C
Genre: Conference Paper

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 Creators:
Ball, Warrick H.1, Author              
Affiliations:
1Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832287              

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 Abstract: Inaccurate modelling of the near-surface layers of solar models causes a systematic difference between modelled and observed solar mode frequencies. This difference—known as the “surface effect” or “surface term”—presumably also exists in other solar-like oscillators and must somehow be corrected to accurately relate mode frequencies to stellar model parameters. After briefly describing the various potential causes of surface effects, I will review recent progress along two different lines. First, various methods have been proposed for removing the surface effect from the mode frequencies and thereby fitting stellar models without the disproportionate influence of the inaccurate near-surface layers. Second, three-dimensional radiation hydrodynamics simulations are now being used to replace the near-surface layers of stellar models across a range of spectral types, leading to predictions of how some components of the surface effect vary between stars. Finally, I shall briefly discuss the future of the problem in terms of both modelling and observation.

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Language(s): eng - English
 Dates: 2018-05-072017
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1051/epjconf/201716002001
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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
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Publ. Info: -
Pages: - Volume / Issue: 160 Sequence Number: 02001 Start / End Page: - Identifier: -