Application of the Baade-Wesselink method to absolute magnitude determination of RR Lyrae stars.

Among the methods used to determine the absolute magnitude of RR Lyrae stars, the Baade-Wesselink method is the only one that is based on the intrinsic properties of the stars. This paper gives a review of recent results of absolute magnitude determination of RR Lyrae stars with the Baade-Wesselink method and points out that there are several problems which must be paid attention.