Stellar evolution along the HR diagram with Gaia

Session

Stellar evolution and pulsation models

21 Sept 2022, 11:10

INAF-Osservatorio Astronomico di Capodimonte

54. Constraints on AGB stellar models from GAIA (Invited)

S. Van Eck

21/09/2022, 11:10

In this review I will present some Gaia highlights concerning AGB stars. Gaia parallaxes of the most evolved AGB stars suffer from surface brightness and color variations. Binarity diagnostics are also less precise due to such jitter. Despite these difficulties, Gaia data are able to bring strong constraints on stellar evolution by allowing to clearly constrain the luminosities of several...

56. Constraining the Evolution of Milky Way AGB stars and Their White Dwarf Progeny with GAIA (Invited)

P. Marigo

21/09/2022, 11:40

We examine the population of asymptotic giant branch (AGB) stars that appear in the fields of intermediate-age and young open star clusters using GAIA DR2 and EDR3 photometric and astrometric data. For the first time, thanks to GAIA, we identify 49 AGB star candidates brighter than the tip of the red giant branch, with a good to high cluster membership probability. There are 19 TP-AGB stars...

58. Stellar models of Massive Stars and GAIA (Invited)

G. Meynet

21/09/2022, 12:10

In this talk, I shall discuss the main challenges faced by massive star modelling and how the data collected by Gaia may help in overcoming these challenges.
We shall begin by addressing questions related to massive star formation, then discuss the impacts of the physics of transport processes both in convective and radiative layers. We shall comment on the questions of the impact of mass...

55. Characterisation of Galactic carbon stars and related stars from Gaia DR3

C. Abia

In a previous investigation, we used Gaia DR2 astrometry to derive the luminosity function, kinematic properties, and stellar population membership of a flux-limited sample of carbon stars in the solar neighbourhood of diferent spectral types. Here, we extend this initial study to more recent surveys with a greater number of Galactic carbon stars and related stars by adopting the more...