English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The properties of the oscillations in rapidly oscillating Ap stars strongly depend on the chemical stratication of the star. In this paper we examine the eects of large magnetic eld and various chemical transport processes (convection, He settling, turbulence and mass loss) on the chem- ical composition of Ap stars and on their stability. We show that the stellar evolutionary models that best reproduce the observations are those with convection suppressed, He settling and no wind. In the region of the HR diagram where most roAp stars have been found, these models predict the excitation of high frequency p modes and the damping of low frequency p modes, as observed.

Excitation of oscillations in roAp stars: the roles of He settling and winds