Stellar evolution along the HR diagram with Gaia

Session

Stellar evolution and pulsation models

21 Sept 2022, 09:00

50. The galaxy in your preferred colour: synthetic photometry from Gaia XP spectra (Invited)

M. Bellazzini

21/09/2022, 09:00

The release of BP/RP spectrophotometry for 220 M stars in Gaia DR3 allows for the first time to obtain synthetic photometry in any passband enclosed in the range 330-1050 nm.
This photometry is (a) obtained from data acquired beyond the Earth’s atmosphere, (b) all sky, (c) directly tied to fluxes in physical units, (d) precise to the limits enforced by the internal calibration of Gaia...

51. Low-mass star modelling: constraints from Gaia (Invited)

S. Cassisi

21/09/2022, 09:30

Despite the huge progress made in these last decades in the modelling of low-mass stars, there are still important uncertainties affecting their stellar models. In this talk, we'll review some important aspects related to the evolutionary and structural properties of low-mass stars, and discuss the constraints/benchmarks provided by Gaia data.

52. Single star sequences of the Hyades and Pleiades open clusters

W. Brandner

21/09/2022, 10:00

Based on GAIA DR3 we have identified bonafide single stars and likely binary and multiple systems in the Hyades and Pleiades open clusters. We fit fiducial isochrones in the GAIA photometric system for more than 600 single stars in the Hyades, and more than 800 single stars in the Pleiades. The fiducial isochrones serve as benchmarks for the MESA/MIST and PARSEC evolutionary models and...

53. Solving the puzzle of mixing in giant stars with the Besançon Galaxy Model

N. Lagarde

21/09/2022, 10:20

The current (and future) large Galactic surveys are revolutionising our knowledge of Galactic and stellar physics, providing kinematics, chemical and global properties for a very large number of stars across the Milky Way. The Gaia and Kepler space-missions, along with ground-based spectroscopic surveys paves the way to a better understanding of stellar interiors, providing valuable and...