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Coupling 1D stellar evolution with 3D-hydrodynamical simulations on-the-fly II: Stellar Evolution and Asteroseismic Applications
- Source :
- Mosumgaard, J R, Jørgensen, A C S, Weiss, A, Aguirre, V S & Christensen-Dalsgaard, J 2020, ' Coupling 1D stellar evolution with 3D-hydrodynamical simulations on-the-fly II : Stellar Evolution and Asteroseismic Applications ', Monthly Notices of the Royal Astronomical Society, vol. 491, no. 1, pp. 1160-1173 . https://doi.org/10.1093/mnras/stz2979
- Publication Year :
- 2019
-
Abstract
- Models of stellar structure and evolution are an indispensable tool in astrophysics, yet they are known to incorrectly reproduce the outer convective layers of stars. In the first paper of this series, we presented a novel procedure to include the mean structure of 3D hydrodynamical simulations on-the-fly in stellar models, and found it to significantly improve the outer stratification and oscillation frequencies of a standard solar model. In the present work, we extend the analysis of the method; specifically how the transition point between envelope and interior affects the models. We confirm the versatility of our method by successfully repeating the entire procedure for a different grid of 3D hydro-simulations. Furthermore, the applicability of the procedure was investigated across the HR diagram and an accuracy comparable to the solar case was found. Moreover, we explored the implications on stellar evolution and find that the red-giant branch is shifted about 40 K to higher effective temperatures. Finally, we present for the first time an asteroseismic analysis based on stellar models fully utilising the stratification of 3D simulations on-the-fly. These new models significantly reduce the asteroseismic surface term for the two selected stars in the Kepler field. We extend the analysis to red giants and characterise the shape of the surface effect in this regime. Lastly, we stress that the interpolation required by our method would benefit from new 3D simulations, resulting in a finer sampling of the grid.<br />14 pages, 13 figures, 4 tables. Accepted for publication in MNRAS
- Subjects :
- Physics
Standard solar model
astro-ph.SR
010308 nuclear & particles physics
Hertzsprung–Russell diagram
FOS: Physical sciences
Stratification (water)
Astronomy and Astrophysics
01 natural sciences
Asteroseismology
Computational physics
symbols.namesake
Stars
Transition point
Astrophysics - Solar and Stellar Astrophysics
13. Climate action
Space and Planetary Science
0103 physical sciences
symbols
Astrophysics::Solar and Stellar Astrophysics
Stellar structure
Astrophysics::Earth and Planetary Astrophysics
010303 astronomy & astrophysics
Stellar evolution
Solar and Stellar Astrophysics (astro-ph.SR)
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Mosumgaard, J R, Jørgensen, A C S, Weiss, A, Aguirre, V S & Christensen-Dalsgaard, J 2020, ' Coupling 1D stellar evolution with 3D-hydrodynamical simulations on-the-fly II : Stellar Evolution and Asteroseismic Applications ', Monthly Notices of the Royal Astronomical Society, vol. 491, no. 1, pp. 1160-1173 . https://doi.org/10.1093/mnras/stz2979
- Accession number :
- edsair.doi.dedup.....cee794981aeb3eae8435a5d5e5f4136b