If you're going to interpret photometric variability in Gaia photometry this paper is probably required reading. When Gaia revisits a target, the instrument is not at the same orientation. In other words, the camera has a variable roll angle relative to the sky. Resolving faint neighbors depends on the roll angle causing supurious periodicities in the resulting measurements

Holl, Fabricius, Portell, et al.
https://arxiv.org/abs/2212.11971
#astronomy #AstroNotable #AstroNotable_Star

The symphony of frequencies in some Pulsating Red Giant stars is a bit out of tune. Models with chemical discontinuities due to extra mixing between the convective core and stable radiative layer surrounding it tend to fit these out-of-tune Red Giants.
@MVrard@twitter.com , Cunha, Bossini, @EnricoCors@twitter.com , et al.
https://arxiv.org/abs/2212.11393

#astronomy #AstroNotable #AstroNotable_Star

Pulsating Delta Scuti stars may have a thing or two to teach us about stellar opacity calculations. If one uses stellar models to match the pulsation frequencies of well studied Delta Scuti stars, then the stellar model predicted luminosity and Teff disagree with the measured values. Daszyńska-Daszkiewicz, Walczak, Pamyatnykh, et al.
https://arxiv.org/abs/2212.14294

#astronomy #AstroNotable #AstroNotable_Star