Seismic Diagrams for beta Cephei stars; A database for COROT

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Seismic Diagrams for

b Cephei Stars

A database for COROT

BAG

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• Stellar Evolution Code: CLES • Adiabatic oscillation code: OSC • Non Adiabatic oscillation code: MAD

Tools

BAG

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Grid of models

• Model parameters: – Mass M: 8 to 11 M0 – Metallicity Z: 0.010 to 0.025 – Hydrogen Abundance X: 0.6 to 0.7 – Overshooting Parameter _ov: 0 to 0.2 BAG A. Thoul

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Excited zone on the Main Sequence:

effects of M and Z BAG

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effect of X BAG

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effects of _ov and Z BAG

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Depends mostly on the metallicity Z

BAG

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Which modes are excited?

BAG

Degree l Order n

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l=0, n=1 BAG

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l=0, n=2 BAG

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l=0, n=3 BAG

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l=1, n=-1 BAG

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l=1, n=1 BAG

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l=1, n=2 BAG

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l=2, n=-4 BAG

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l=2, n=-3 BAG

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l=2, n=-2 BAG

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l=2, n=-1 BAG

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l=2, n=0 BAG

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l=2, n=1 BAG

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l=2, n=2 BAG

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Excited Modes:

BAG l=0 l=1 l=2 1 -1 -3 2 1 -2 3 2 -1 0 1 A. Thoul

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Evolution of the Frequencies BAG

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Seismic Diagrams BAG

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Seismic Diagrams BAG

Good approximation for the mass

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Determination of the

Stellar Parameters: <> BAG

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An example:

HD129929

Observed and identified frequencies:

– f₁=76.28403 mHz mode: l=0 m=0

– f₁=80.76742 mHz mode: l=1 m=0

– f₁=74.64803 mHz mode: l=2 m=0?

BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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An example:

HD129929 BAG

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HD129929:

Determination of <> BAG

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HD129929:

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HD129929:

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65 HD129929: Determination of <> BAG Mode l=1 <>/ <_> = 0.0520  0.0008 A. Thoul

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To be continued…

• Continue to build grids of models

b Cephei stars

– SPBs, Scuti, …

• Construct additional seismic diagrams

– Use combination of frequencies

• Find relations between stellar properties and frequencies

BAG

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To be discussed…

BAG

• Interest from the community • Format of data

• Access to results

• Comparison with other codes

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