| |
 |
| Paper: |
Gaia Parallaxes Versus Updated Pulsation Model Predictions |
| Volume: |
529, RR Lyrae/Cepheid 2019: Frontiers of Classical Pulsators |
| Page: |
27 |
| Authors: |
De Somma, G.; Marconi, M.; Molinaro, R.; Cignoni, M.; Musella, I.; Ripepi, V. |
| Abstract: |
In the context of a new theoretical project aimed to investigate the residual systematic errors in the extragalactic distance scale and to evaluate the Cepheid-based Hubble Constant, we present the results obtained so far for the chemical composition Z=0.02, Y=0.28 pulsation models. In particular the first theoretical light curves in the Gaia filters are presented as a function of pulsation model assumptions concerning the Mass-Luminosity relation and the efficiency of superadiabatic convection. These curves are used to derive mean magnitudes and colors, and in turn Period-Wesenheit relations, which are applied to a sample of Galactic Cepheids in the Gaia Data Release 2 to derive theoretical, individual distances and parallaxes. |
|
|
|
|
|
