恒星物理研究组知识库

Asteroseismology is a very useful tool for exploring the stellar interiors and evolutionary status and for determining stellar fundamental parameters, such as stellar mass, radius, surface gravity, and the stellar mean density. In this work, we use it to preliminarily analyse the 14 new type pulsating stars: Blue Large-Amplitude Pulsators (BLAPs) which is observed by Optical Gravitational Lensing Experiment project, to roughly analyse their evolutionary status. We adopt the theory of single star evolution and artificially set the mass-loss rate of (M) over dot = -2 x 10(-4) M-circle dot yr(-1) and mass-loss beginning at the radius of R = 40 R-circle dot on red giant branch to generate a series of theoretical models. Based on these theoretical models and the corresponding observations, we find that those BLAP stars are more likely to be the core helium burning stars. Most of them are in the middle and late phase of the helium burning.