The EXOTIME Targets HS 0702+6043 andHS 0444+0458

摘要

Pulsations in subdwarf B (sdB) stars are an important tool to constrain the evolutionary status of these evolved objects. Interestingly, the same data used for this asteroseismological ap-proach can also be used to search for substellar companions around these objects by analyzing the timing of the pulsations by means of a so-called O–C diagram. Substellar objects around sdB stars arc important for two different reasons: they are suspected to be able to influence the evolution of their host-star and they are an ideal test case to examine the properties of exoplanets which have survived the red giant expansion of their host stars.