Asteroseismology of the GW Virginis stars SDSS J0349−0059 and VV 47

Context. GW Virginis stars are a well-studied class of nonradial g-mode pulsators. SDSS J0349−0059 and VV 47 are two PG 1159 star members of this class of variable stars. SDSS J0349−0059 is an interesting GW Vir star that shows a complete pulsation spectrum that includes rotational splitting of some of its frequencies. VV 47 is a pulsating PG 1159 star surrounded by a planetary nebula. This star is particularly interesting because it exhibits a rich and complex pulsation spectrum.