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| Paper: |
Pulsations in roAp Stars and Their Mode Stability |
| Volume: |
518, Physics of Magnetic Stars |
| Page: |
186 |
| Authors: |
Sachkov, M. E. |
| Abstract: |
Rapidly oscillating chemically peculiar A stars (roAp) is a subgroup of the
chemically peculiar magnetic A stars. They pulsate in low-degree high-overtone acoustic modes. They provide an excellent opportunity to study the interaction of strong magnetic fields,
rotation, and pulsations. Over the last decades, the studies of roAp stars have been
altered drastically from the observational point of view through the usage of timeresolved,
high-resolution spectra. Their unusual pulsation characteristics, caused by the
interplay between short vertical lengths of pulsation waves and strong stratification of
chemical elements, allow us to examine the upper roAp atmosphere in more detail than
is possible for any star except the Sun. There is a long discussion how stable are their pulsation modes. Here we review results of recent studies of the
pulsations of roAp stars. |
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