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Coupling between turbulence and solar-like oscillations: A combined Lagrangian PDF/SPH approach

Autor: J. Philidet, K. Belkacem, M.-J. Goupil

Publikováno v: Astronomy & Astrophysics. 664:A164

The first paper of this series established a linear stochastic wave equation for solar-like p-modes, correctly taking the effect of turbulence thereon into account. In this second paper, we aim at deriving simultaneous expressions for the excitation

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::950f7f7fb3b4271fe67bb52eb3bc1098
https://doi.org/10.1051/0004-6361/202142947

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Surface effects and turbulent pressure

Autor: Friedrich Kupka, R. Samadi, J. Philidet, K. Belkacem

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2021, 646, pp.L5. ⟨10.1051/0004-6361/202040259⟩

The use of the full potential of stellar seismology is made difficult by the improper modeling of the upper-most layers of solar-like stars and their influence on the modeled frequencies. Our knowledge on these \emph{surface effects} has improved tha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::362e5b6069da5871d759ae3b6e6f7f70
http://arxiv.org/abs/2101.06065

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Velocity-intensity asymmetry reversal of solar radial p-modes

Autor: Reza Samadi, C. Barban, J. Philidet, Hans-Günter Ludwig, Kevin Belkacem

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 644, pp.A171. ⟨10.1051/0004-6361/202038222⟩

The development of space-borne missions has significantly improved the quality of the measured spectra of solar-like oscillators. Their $p$-mode line profiles can now be resolved, and the asymmetries inferred for a variety of stars other than the Sun

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d779225798775a4b87e301608e2874a
https://hal.archives-ouvertes.fr/hal-03078855/file/aa38222-20.pdf

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Modelling the asymmetries of the Sun's radial $p$-mode line profiles

Autor: J. Philidet, Hans-Günter Ludwig, Kevin Belkacem, Reza Samadi, C. Barban

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 635, pp.A81. ⟨10.1051/0004-6361/201936847⟩

In this paper, we aim to develop a predictive model for solar radial $p$-mode line profiles in the velocity spectrum. Unlike the approach favoured by prior studies, this model is not described by free parameters and we do not use fitting procedures t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42d58b7512beaf71cd485f2e32405035

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Coupling between turbulence and solar-like oscillations: A combined Lagrangian PDF/SPH approach

Autor: Kevin Belkacem, M.-J. Goupil, J. Philidet

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2021, 656, pp.A95. ⟨10.1051/0004-6361/202141483⟩

Aims. This series of papers aims at building a new formalism specifically tailored to study the impact of turbulence on the global modes of oscillation in solar-like stars. This first paper aims at deriving a linear wave equation that directly and co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::687c33aeb3129a90ec2d462d3f799ba4
https://doi.org/10.1051/0004-6361/202141483

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Magnetohydrodynamics of stably stratified regions in planets and stars

Autor: Christophe Gissinger, Ludovic Petitdemange, J. Philidet, François Lignières

Publikováno v: Geophysical and Astrophysical Fluid Dynamics
Geophysical and Astrophysical Fluid Dynamics, In press, pp.1-20. ⟨10.1080/03091929.2019.1670827⟩
Geophysical and Astrophysical Fluid Dynamics, Taylor & Francis, In press, pp.1-20. ⟨10.1080/03091929.2019.1670827⟩

Stably stratified layers are present in stellar interiors (radiative zones) as well as planetary interiors - recent observations and theoretical studies of the Earth's magnetic field seem to indicate the presence of a thin, stably stratified layer at

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff15275c769762733a8539b8cc601c94
https://hal.sorbonne-universite.fr/hal-02344508

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