Scalar mode

In the Theory of the cosmological disturbances, the term of scalar mode refers to a disturbance of the Métrique riemannienne of the Univers which corresponds to a scalar object, following the example gravitational Potentiel in Newtonian physics.

The General relativity stipulates that there exist two scalar modes, the equivalent of two gravitational fields, which in practice are almost always equal. They are called potential of Bardeen, of the name of James Bardeen.

There exist other types of disturbances in Cosmologie: the vectorial modes, which result from the rotational fields speed (i.e. of divergence null, corresponding to kinetic Moment, such as for example in a Tornade), and the tensorial modes, which correspond to the gravitational waves. Various considerations make it possible to think that the vectorial modes do not play any part in cosmology, whereas the gravitational waves could play a part, in particular in the interpretation of the Anisotropie S of the cosmological diffuse Fond.

See too

• Potential of Bardeen

• Theory of the cosmological disturbances
• vectorial Mode
• tensorial Mode

References

• See Works specialized on cosmology

Random links:

Charles Ier de Mantoue, descent on three degrees | The Review of Rouergue | Clark Gregg | See-Saw (group) | Twinnings franco-israëliens | Æbleskiver

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