Stellar evolution along the HR diagram with Gaia

Session

Overview on Gaia data/products and their use

20 Sept 2022, 11:10

INAF-Osservatorio Astronomico di Capodimonte

41. Gaia chemical abundances from the Radial Velocity Spectrograph (Invited)

A. Recio-Blanco

20/09/2022, 11:10

The chemo-physical parametrization of stellar spectra is essential to understand the nature and evolution of stars and of Galactic stellar populations.

The Gaia third data release contains the parametrization of the Radial Velocity Spectrometer data, performed by the General Stellar Parametrizer-spectroscopy, GSP-Spec, module.

With about 5.6 million stars, the Gaia DR3 GSP-Spec all-sky...

42. Variable stars in Gaia Data Release 3 (Invited)

V. Ripepi

20/09/2022, 11:40

Pulsating variable stars have been used for a long time both as fundamental distance indicators and as stellar population tracers. But, thanks to the availability of additional observables such as periods and amplitudes, they also represent an independent check for the stellar evolution theory. Also, non-intrinsic variables, like binaries, rotational etc. provide important constraints to...

43. Absolute calibration of Type II Cepheid and RR Lyrae distance scales using Gaia DR3

A. Bhardway

20/09/2022, 12:10

RR Lyrae and Type II Cepheid variables are sensitive probes for the precision stellar astrophysics and the distance scale. These population II variables are known to follow well-defined Period-Luminosity relation at NIR wavelengths and can provide an independent primary calibration of the cosmic distance ladder. We present an absolute calibration of Period-Luminosity-Metallicity relations...