- Frequency Dependence of Δν of Solar-Like Oscillators Investigated: Influence of HeII Ionization Zone
- Book title
- Stellar Pulsations: impact of new instrumentation and new insights
- Pages (from-to)
- Number of pages
- Heidelberg: Springer
- Astrophysics and Space Science Proceedings
- Volume | Edition (Serie)
- Document type
- Faculty of Science (FNWI)
- Anton Pannekoek Institute for Astronomy (API)
Oscillations in solar-like oscillators tend to follow an approximately regular pattern in which oscillation modes of a certain degree and consecutive order appear at regular intervals in frequency, i.e. the so-called large frequency separation. This is true to first order approximation for acoustic modes. However, to a second order approximation it is evident that the large frequency separation changes as a function of frequency. This frequency dependence has been seen in the Sun and in other main-sequence stars. However, from observations of giant stars, this effect seemed to be less pronounced. We investigate the difference in frequency dependence of the large frequency separation between main-sequence and giant stars using YREC evolutionary models.
- go to publisher's site
- Gebeurtenis: 20th Stellar Pulsation Conference
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