Addressing the acoustic tachocline anomaly and the lithium depletion problem at the same time

Andreas Christ Sølvsten Jørgensen; Achim Weiss

doi:10.1093/mnras/sty2590

Addressing the acoustic tachocline anomaly and the lithium depletion problem at the same time

Andreas Christ Sølvsten Jørgensen, Achim Weiss

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

11 Citationer (Scopus)

Abstract

Current standard solar models neither account properly for the photospheric lithium abundance nor reproduce the inferred solar sound speed profile. Diffusive overshooting at the base of the solar convective envelope has previously been shown to solve either of these model inadequacies. In this paper, we present an analysis of solar models with four different parametrizations of diffusive overshooting. We find that these models are able to recover the correct lithium depletion, regardless of the parametrization, if overshooting is suppressed, during the early evolutionary stages. Further, parametrizations of diffusive overshooting have been shown to improve the inferred sound speed profile. However, none of the presented models are able to simultaneously solve both model inadequacies, showing that diffusive overshooting on its own is deficient to account for observations.

Originalsprog	Engelsk
Tidsskrift	Royal Astronomical Society. Monthly Notices
Vol/bind	481
Nummer	4
Sider (fra-til)	4389-4396
Antal sider	8
ISSN	0035-8711
DOI	https://doi.org/10.1093/mnras/sty2590
Status	Udgivet - 21 dec. 2018
Udgivet eksternt	Ja

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abstract = "Current standard solar models neither account properly for the photospheric lithium abundance nor reproduce the inferred solar sound speed profile. Diffusive overshooting at the base of the solar convective envelope has previously been shown to solve either of these model inadequacies. In this paper, we present an analysis of solar models with four different parametrizations of diffusive overshooting. We find that these models are able to recover the correct lithium depletion, regardless of the parametrization, if overshooting is suppressed, during the early evolutionary stages. Further, parametrizations of diffusive overshooting have been shown to improve the inferred sound speed profile. However, none of the presented models are able to simultaneously solve both model inadequacies, showing that diffusive overshooting on its own is deficient to account for observations.",

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Addressing the acoustic tachocline anomaly and the lithium depletion problem at the same time. / Jørgensen, Andreas Christ Sølvsten; Weiss, Achim.
I: Royal Astronomical Society. Monthly Notices, Bind 481, Nr. 4, 21.12.2018, s. 4389-4396.

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

TY - JOUR

T1 - Addressing the acoustic tachocline anomaly and the lithium depletion problem at the same time

AU - Jørgensen, Andreas Christ Sølvsten

AU - Weiss, Achim

PY - 2018/12/21

Y1 - 2018/12/21

N2 - Current standard solar models neither account properly for the photospheric lithium abundance nor reproduce the inferred solar sound speed profile. Diffusive overshooting at the base of the solar convective envelope has previously been shown to solve either of these model inadequacies. In this paper, we present an analysis of solar models with four different parametrizations of diffusive overshooting. We find that these models are able to recover the correct lithium depletion, regardless of the parametrization, if overshooting is suppressed, during the early evolutionary stages. Further, parametrizations of diffusive overshooting have been shown to improve the inferred sound speed profile. However, none of the presented models are able to simultaneously solve both model inadequacies, showing that diffusive overshooting on its own is deficient to account for observations.

AB - Current standard solar models neither account properly for the photospheric lithium abundance nor reproduce the inferred solar sound speed profile. Diffusive overshooting at the base of the solar convective envelope has previously been shown to solve either of these model inadequacies. In this paper, we present an analysis of solar models with four different parametrizations of diffusive overshooting. We find that these models are able to recover the correct lithium depletion, regardless of the parametrization, if overshooting is suppressed, during the early evolutionary stages. Further, parametrizations of diffusive overshooting have been shown to improve the inferred sound speed profile. However, none of the presented models are able to simultaneously solve both model inadequacies, showing that diffusive overshooting on its own is deficient to account for observations.

KW - Sun: abundance

KW - Sun: evolution

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DO - 10.1093/mnras/sty2590

M3 - Journal article

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JO - Royal Astronomical Society. Monthly Notices

JF - Royal Astronomical Society. Monthly Notices

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Addressing the acoustic tachocline anomaly and the lithium depletion problem at the same time

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