Improving 1D Stellar Models with 3D Atmospheres

Jakob Rørsted Mosumgaard; Víctor Silva Aguirre; Achim Weiss; Jørgen Christensen-Dalsgaard; Regner Trampedach

doi:10.1051/epjconf/201716003009

Improving 1D Stellar Models with 3D Atmospheres

Jakob Rørsted Mosumgaard, Víctor Silva Aguirre, Achim Weiss, Jørgen Christensen-Dalsgaard, Regner Trampedach

Institut for Fysik og Astronomi - Stellar Astrophysics Centre

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

7 Citationer (Scopus)

219 Downloads (Pure)

Abstract

Stellar evolution codes play a major role in present-day astrophysics, yet they share common issues. In this work we seek to remedy some of those by the use of results from realistic and highly detailed 3D hydrodynamical simulations of stellar atmospheres. We have implemented a new temperature stratification extracted directly from the 3D simulations into the Garching Stellar Evolution Code to replace the simplified atmosphere normally used. Secondly, we have implemented the use of a variable mixing-length parameter, which changes as a function of the stellar surface gravity and temperature - also derived from the 3D simulations. Furthermore, to make our models consistent, we have calculated new opacity tables to match the atmospheric simulations. Here, we present the modified code and initial results on stellar evolution using it.

Originalsprog	Engelsk
Artikelnummer	03009
Tidsskrift	E P J Web of Conferences
Vol/bind	160
Antal sider	4
ISSN	2100-014X
DOI	https://doi.org/10.1051/epjconf/201716003009
Status	Udgivet - 27 okt. 2017

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10.1051/epjconf/201716003009

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7 Citationer
1 Poster

Improving 1D Stellar Models with 3D Atmospheres
Mosumgaard, J. R., jul. 2016.
Publikation: Konferencebidrag › Poster › Forskning

1 Deltagelse i eller organisering af konference

TASC2/KASC9/SpaceInn
Mosumgaard, J. R. (Deltager)
10 jul. 2016 → 15 jul. 2016
Aktivitet: Deltagelse i eller arrangement af en begivenhed - typer › Deltagelse i eller organisering af konference

Citationsformater

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AU - Mosumgaard, Jakob Rørsted

AU - Silva Aguirre, Víctor

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AU - Christensen-Dalsgaard, Jørgen

AU - Trampedach, Regner

PY - 2017/10/27

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AB - Stellar evolution codes play a major role in present-day astrophysics, yet they share common issues. In this work we seek to remedy some of those by the use of results from realistic and highly detailed 3D hydrodynamical simulations of stellar atmospheres. We have implemented a new temperature stratification extracted directly from the 3D simulations into the Garching Stellar Evolution Code to replace the simplified atmosphere normally used. Secondly, we have implemented the use of a variable mixing-length parameter, which changes as a function of the stellar surface gravity and temperature - also derived from the 3D simulations. Furthermore, to make our models consistent, we have calculated new opacity tables to match the atmospheric simulations. Here, we present the modified code and initial results on stellar evolution using it.

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Improving 1D Stellar Models with 3D Atmospheres

Abstract

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Publikation

Improving 1D Stellar Models with 3D Atmospheres

Aktiviteter

TASC2/KASC9/SpaceInn

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