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Near-surface Effects in Modelling Oscillations of η Boo

Published online by Cambridge University Press:  12 April 2016

Jørgen Christensen-Dalsgaard ,
Timothy R. Bedding ,
Günter Houdek ,
Hans Kjeldsen ,
Colin Rosenthal ,
Regner Trampedach ,
Mario J.P.F.G. Monteiro  and
Åke Nordlund
Jørgen Christensen-Dalsgaard
Affiliation:
Teoretisk Astrofysik Center, Danmarks Grundforskningsfond
Timothy R. Bedding
Affiliation:
School of Physics, University of Sydney 2006, Australia
Günter Houdek
Affiliation:
Institut für Astronomie, Universität Wien, Austria
Hans Kjeldsen
Affiliation:
Teoretisk Astrofysik Center, Danmarks Grundforskningsfond
Colin Rosenthal
Affiliation:
Teoretisk Astrofysik Center, Danmarks Grundforskningsfond
Regner Trampedach
Affiliation:
Teoretisk Astrofysik Center, Danmarks Grundforskningsfond
Mario J.P.F.G. Monteiro
Affiliation:
Centro de Astrofisica, Universidade do Porto, Portugal
Åke Nordlund
Affiliation:
Niels Bohr Institutet, Københavns Universitet, Denmark

Extract

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Following the report of solar-like oscillations in the G0 V star η Boo (Kjeldsen et al. 1995), a first attempt to model the observed frequencies was made by Christensen-Dalsgaard et al. (1995). This attempt succeeded in reproducing the observed frequency separations Δv and δv02, although there remained a difference of ∼ 10 μHz between observed and computed frequencies. In those models, the near-surface region of the star was treated rather crudely: convection was described by means of a local mixing-length theory neglecting turbulent pressure, and the oscillations were assumed to be adiabatic. These approximations are likely to affect both Δv and absolute frequencies.

Type
Part 2. Poster Papers
Information
International Astronomical Union Colloquium , Volume 155: Astrophysical Applications of Stellar Pulsation , 1995 , pp. 447 - 448
Copyright
Copyright © Astronomical Society of the Pacific 1995

References

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