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Annie Baglin, Gaël Buldgen, Marc-Antoine Dupret, Andrea Miglio, Josefina MontalbÁn, Sébastien Salmon, Hiromoto Shibahashi & Valérie Van Grootel

How Much do we Trust StellarModels?
– Foreword –

Article
Open Access

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Figure 1: A Tribute to Arlette by her longtime friend Annie Baglin

1. Conference rationale

1Eighty years ago, Paul Ledoux, then in Chicago, published with Chaim Leib Pekeris the now famous work entitled Radial Pulsations of Stars. Stellar evolution was still in its infancy, numerical model were not computed on a massive scale as today. With the advent of computers and the improvement of observational data, the study of stellar structure and evolution has now become a central field of astrophysics, and pulsations have become the prime method to learn about the internal structure of stars.

2In the last fifteen years space telescopes provided us a tremendous amount of data, opening the way to test stellar models with unprecedented thoroughness. It is now up to theoretical stellar physi-cists to use these observations to improve stellar models and provide accurate stellar properties to fields such as exoplanetary science and Galactic archeology.

3The last decades were also marked by the achievements of a remarkable scientist, an inspiring col-league, a patient teacher and a friend, who devoted herself to our field of research and who celebrated her 75th birthday in August 2018, Arlette Grotsch-Noels. This conference is a tribute to Arlette.

4The aim of this workshop was to bring together experts of theoretical stellar physics and Galactic archeology to discuss the current issues connected to stellar structure and evolution. Topics ranged from microphysical ingredients such as atomic diffusion and radiative opacities to macrophysical pro-cesses such as rotational mixing and turbulence and their connexion to the solar modeling problem, the evolution of solar-like and massive stars, as well as the modeling of red giants and the importance of these Galactic candles to unravel the history of the Galaxy.

5Happy birthday Arlette!

Image 10000000000002D20000021FEF653BDB20FDFA61.jpg

Figure 2: A Tribute to Arlette by her longtime friend Hiromoto Shibahashi

2 Some fun as well?

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Figure 3: After effort comes comfort

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Figure 4: Arlette’s friends at the conference dinner

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Figure 5: Arlette with Carla, Georges and Cristina

Table of Contents

1 Foreword

Baglin A. et al.

1-4

2 Uncertainties in Current Stellar Models

Grevesse N.

The Solar Chemical Composition: Past and Present

5-14

Eggenberger P.

Magnetic Fields and Transport Processes

15-26

Belkacem K.

Transport of Angular Momentum by Waves in Stars

27-43

Richard O.

Gravitational Settling and Radiative Accelerations

44-49

3 Main Sequence Stars

Buldgen G.

Global Helioseismology

50-75

Maceroni C.

Binaries as Precious Tools for Stellar Evolution and Asteroseismic Results

76-83

Deheuvels S.

Probing Core Overshooting using Asteroseismology

84-105

Reese D.

Fast Rotation and Acoustic Modes

106-114

4 Evolved Stars

Goupil M.J.

Seismic Probe of Transport Processes in Red Giants

115-146

Shibahashi H., Murphy S.J.

Asteroseismology as a New Window to Statistics of Binaries

147-162

To cite this article

Annie Baglin, Gaël Buldgen, Marc-Antoine Dupret, Andrea Miglio, Josefina MontalbÁn, Sébastien Salmon, Hiromoto Shibahashi & Valérie Van Grootel, «How Much do we Trust StellarModels?», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 88 - Année 2019, Actes de colloques, How Much to we Trust Stellar Models ? - September 2018 - Liège, Belgium, 1-4 URL : https://popups.uliege.be/0037-9565/index.php?id=9227.

About: Annie Baglin

LESIA, Observatoire de Paris, 92195 Meudon.

About: Gaël Buldgen

School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK and Observatoire de Genève, Universitéde Genève, 51 Ch. Des Maillettes, CH-1290 Sauverny, Suisse.

About: Marc-Antoine Dupret

Space sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, 19c allée du Six Août, B-4000 Liège, Belgium.

About: Andrea Miglio

School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.

About: Josefina MontalbÁn

School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.

About: Sébastien Salmon

Space sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, 19c allée du Six Août, B-4000 Liège, Belgium.

About: Hiromoto Shibahashi

Department of Astronomy, School of Science, University of Tokyo, Tokyo 113-0033, Japan

About: Valérie Van Grootel

Space sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, 19c allée du Six Août, B-4000 Liège, Belgium.