Asteroseismology Across the HRD

Tutorial for the 2022 MESA Summer School at UC Santa Barbara, given by Earl Bellinger on August 11.

This series of labs teaches how to extend MESA in order to do stellar pulsation calculations with GYRE. The test-case is evolving a solar-type star from the main sequence through to the red giant branch phase and observing the emergence and evolution of mixed oscillation modes (see Supplementary Materials below for background information).

This tutorial involves editing the Fortran run_star_extras.f90 file in order to call GYRE on every stellar model. For a tutorial based on post-processing of stellar models e.g. in Python, see this tutorial that I gave at the annual asteroseismology meeting.

Contents

• MiniLab 1: First Steps
  • Overview
  • Download a Working Directory
  • Evolve the Model
  • Modify the Code
  • Compile and Run
• MiniLab 2: Plotting Frequencies
  • Overview
  • Adding Frequencies to History Output
  • Running the Code
  • Plotting the Frequencies
• MiniLab 3: Plotting Eigenfunctions
  • Overview
  • Adding Eigenfunctions to Profile Output
  • Running the Code
  • Fixing the Crash
  • Plotting the Eigenfunctions
• MaxiLab: Exploring Mixed Oscillation Modes
  • Overview
  • Finding the mixed mode
  • Mapping the Instability Strip
• Supplementary Materials
  • Talk Slides
  • Instability Strips