CoRoT/ESTA-TASK 1 and TASK 3 comparison of the internal structure and seismic properties of representative stellar models: Comparisons between the ASTEC, CESAM, CLES, GARSTEC and STAROX codes

Abstract

We compare stellar models produced by different stellar evolution codes for the CoRoT/ESTA project, comparing their global quantities, their physical structure, and their oscillation properties. We discuss the differences between models and identify the underlying reasons for these differences. The stellar models are representative of potential CoRoT targets. Overall we find very good agreement between the five different codes, but with some significant deviations. We find noticeable discrepancies (though still at the per cent level) that result from the handling of the equation of state, of the opacities and of the convective boundaries. The results of our work will be helpful in interpreting future asteroseismology results from CoRoT.

26 pages, 21 figures, accepted for publication in Astrophysics and Space Science, CoRoT/ESTA Volume

References in corpus (10)

• ADIPLS -- the Aarhus adiabatic oscillation package
• ASTEC -- the Aarhus STellar Evolution Code
• CLES, Code Liegeois d'Evolution Stellaire
• CESAM: a free code for stellar evolution calculations
• The Liege Oscillation Code
• Asteroseismology with the Kepler mission
• The CoRoT Evolution and Seismic Tools Activity: Goals and Tasks
• Grids of stellar evolution models for asteroseismology (CESAM + POSC)
• Comparisons for Esta-Task3: Cles and Cesam
• Microscopic Diffusion in Stellar Evolution Codes: First Comparison results of ESTA-Task~3

Cited by in corpus (4)

• Radius determination of solar-type stars using asteroseismology: What to expect from the Kepler mission
• The CoRoT Evolution and Seismic Tools Activity: Goals and Tasks
• Thorough analysis of input physics in CESAM and CLES codes
• Reference grids of stellar models and oscillation frequencies: Data from the CESAM stellar evolution code and ADIPLS oscillation programme