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Absolute Magnitude determination for Delta Scuti variables

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PaviKSH
Affiliation
American Association of Variable Star Observers (AAVSO)
Wed, 11/16/2022 - 19:19

I've tried to use the Period-Luminosity relation formula which I found on " https://de.wikipedia.org/wiki/Perioden-Leuchtkraft-Beziehung " but it seems to be quite unaccurate. Do you have some other more precise way to calculate the absolute magnitude of a Delta Scuti variable?

 

SHA
Affiliation
American Association of Variable Star Observers (AAVSO)
Wed, 11/16/2022 - 19:53
Delta Scuti P-L relation

You might want to look at the recent paper by Barac et al. (2022 MNRAS and also in astro/ph) titled "Revisiting bright 𝛿 Scuti stars and their period–luminosity relation with TESS and Gaia DR3".  The url for the arxiv version is https://arxiv.org/pdf/2207.00343.pdf.  Perhaps their P-L relations will help.  There is some intrinsic scatter in the relation. Gaia absolute magnitudes might also be directly helpful for some variables.