Progress in the study of pulsating subdwarf B stars
During Kepler's main mission, nearly 20 pulsating subdwarf B (sdB: extreme horizontal branch stars) were discovered. Many of these stars were observed for three years, accumulating over 1.5 million observations. Only through these extended observations have we been able to identify pulsation modes, applying constraints for structure models. Discoveries include nearly-evenly-spaced asymptotic period overtones which represent the interior structure and rotationally-induced frequency multiplets from which we have learned that rotation periods are long, even when in short-period binaries. This paper reviews progress on observational constraints and highlights some of our discoveries including radially differential rotation, conflicting stratification indicators and mode lifetimes.
Physics, Astronomy, and Materials Science
Reed, M. D. "Progress in the study of pulsating subdwarf B stars." Proceedings of the International Astronomical Union 11, no. A29B (2015): 589-595.
Proceedings of the International Astronomical Union