How to drive roAp stars

Alfred Gautschy, Hideyuki Saio, Housi Harzenmoser

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)


Rapidly oscillating Ap stars constitute a unique class of pulsators with which to study non-radial oscillations under some - even for stars - unusual physical conditions. These stars are chemically peculiar, they have strong magnetic fields and they often pulsate in several high-order acoustic modes simultaneously. We discuss here an excitation mechanism for short-period oscillation modes based on the classical κ mechanism. We particularly stress the conditions that must be fulfilled for successful driving. Specifically, we discuss the roles of the chemical peculiarity and strong magnetic field on the oscillation modes and what separates these pulsators from δ Scuti and Am-type stars.

Original languageEnglish
Pages (from-to)31-41
Number of pages11
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
Publication statusPublished - 1998 Nov 21
Externally publishedYes


  • Stars: Chemically peculiar
  • Stars: general
  • Stars: magnetic fields
  • Stars: oscillations

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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