Speaker
Description
We constructed the 'Gaia Catalogue of Galactic AGB stars', a well-characterized dataset of AGB stars with highly reliable Gaia identifications derived from a meticulous cross-matching procedure. The full catalogue combines several samples originating from different compilations of AGB star candidates, and is representative of AGB stars with both O- and C-rich chemistries. The full sample includes approximately 4,700 O-rich and 3,200 C-rich AGB stars. Using photometry compiled from several catalogues available in the Virtual Observatory, covering the range from the far-infrared to the optical, we constructed the spectral energy distributions (SEDs). Bolometric flux estimates were obtained by fitting the SEDs with theoretical models, and for those sources with reliable parallax measurements in Gaia DR3, we derived their stellar luminosities. Finally, we obtained their variability properties from Gaia DR3 epoch photometry.
In this talk, I will present the results of this study, with special emphasis on the comparison between the properties shown by O- and C-rich Galactic AGB populations. We will also discuss the possible period-luminosity-amplitude relationships.