ASTEROSEISMOLOGY OF SUBDWARF B STARS: THE EC 14026 PULSATORS

摘要

We summarize our current observational knowledge about the EC 14016 class of variable stars. We begin by presenting some general considerations about the subd-warf B stars, followed by a description of the main characteristics of the pulsating ones, the so-called EC 14026 objects. We next focus on two particularly interesting cases: that of KPD 1930+2752, a member of an ellipsoidal binary system, and that of PG 0014+067, the first object of the EC 14026 class for which a complete asteroseismologi-cal analysis has been successfully carried out. We conclude by underlining the advantages of studying pulsating sd B stars from space and the importance of these fascinating objects in the grand scheme of stellar evolution.