Stellar coronae and chromospheres in the era of asteroseismology

Stellar magnetic activity is an important parameter to study as it can give insights into stellar activity cycles and even how the stellar dynamo operates. However, as cool stars evolve along the main sequence, they lose angular momentum due to magnetic braking. This results in a decrease in both the rotational velocity and magnetic field generation. This has lead to many studies concerning the evolution of stellar rotation and stellar activity with age. The majority of these studies construct a relationship that is only reliable for ages younger than a gigayear due to the difficulty of determining ages for older stars. However, recent observational advancements have made it possible to study ages for a larger sample of stars through asteroseismology; opening up the possibility of stellar age investigations for stars older than a gigayear. In our research, we have considered the X-ray luminosity and Calcium II H&K emission as a function of stellar age using asteroseismic ages.