Objective of the WP

The objectives of this WP are:

  1. To find out how to get accurate matches between observed and theoretical frequencies computed for the PLATO pipelines
  2. To find the right oscillation code for the theoretical frequencies computation
  3. Provide a version of the code to be used in the pipeline
Current frequency precision (2019)
:!: 0.1 μHz (around υ_max)

ESTA/CoRoT (2008) Precision results

Summary of the oscillation frequency comparison results biblio [1] using the codes: ADIPLS, FILOU, NOSC, LOSC, GRACO, OSCROX, PULSE, POSC and LNAWENR.

Conclusions Comment
1 4K yields 0.02μHz precision, 2K yields 0.5 μHz precision (in average).
2 2K does not properly distribute mesh points in the boundaries of the BV, 4K has no those problems
3 O(2)+Richardson Extrapolation indistinguishable from O(4) neither for 4K nor for 2K
4 r or r/P as integration variable may introduce errors if G is not consistent
5 Eulerian P / Lagrangian P as eigenfunction (modifies BV frequency, euP). May have an impact if thermodynamical quantities are not internally consistent (e.g. OPAL tables)
6 2K not adequate for large/small separations. 4K yields frequency differences below obs precision
7 Proper sampled BV is key to avoid numerical bias. 4K partially overcome the problem
8 G constant inconsistencies affect the frequencies comparison (up to 0.3-0.4 μHz !). Should be taken from the model