Precise Evolutionary Asteroseismology of High-Amplitude δ Scuti Star AE Ursae Majoris

Abstract Stellar structure and evolution theory is one of the bases in modern astronomy. inner structures their evolutionary states can be precisely tested by asteroseismology, since information brought to stellar surface global oscillating waves becomes observable. For speed (i.e., how long timescale does a star stay at special phase?), because insurmountable gap between timescales history human civilization star, it only roughly ensemble stars different stages most cases, all snapshots these make up our view evolution. The effect on corresponding size pulsating will lead tiny period variations its pulsation modes, which are valuable indicators state used test single rather than stars. Here, we report High-Amplitude δ Scuti AE Ursae Majoris, located post main-sequence (MS) stage observed linear variation rate practically ascribed effect. result tests from pre-MS post-MS with an unprecedented precision framework extended other type perform precise aims current stages, discover discrepancies observations, ultimately build complete backtrack each