Another way to measure stellar parameters is to compare predicted and observed pulsations.
But how can we tell whether the frequency we observe is a single oscillation mode, and not a mixture of several unresolved modes?
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The pulsation phase in Przybylski's Star does not change by more than 0.15 of a period for most spectral lines.
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#Astrophysics #Stars #Spectroscopy #Asteroseismology

6/ Source: Mkrtichian et al., "The detection of the rich p-mode spectrum and asteroseismology of Przybylski's star."
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How can p-mode pulsations in Przybylski's Star be produced at many different frequencies? What is the mechanism?
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New in the #VirtualObservatory: “Solar-like oscillations using TESS 2” by Feng Y. et al.
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/283/12
#ChemicalAbundances #EffectiveTemperature #Asteroseismology #VariableStars