Stellar evolution along the HR diagram with Gaia

Session

Stellar evolution and pulsation models

21 Sept 2022, 16:10

INAF-Osservatorio Astronomico di Capodimonte

62. RR Lyrae pulsation and evolutionary models tested against Gaia EDR3 (Invited)

G. Kovacs

21/09/2022, 16:10

The Gaia mission not only leads to new discoveries in nearly all disciplines in astronomy and astrophysics but also offers a unique opportunity for testing the coherence of the parameters derived for various physical systems. Furthermore, these tests help to investigate the possible systematics left in the Gaia
parallaxes.

In this talk we focus on the Galactic field RR Lyrae stars that are...

63. Ultra Long Period Cepheids in the HR diagram: new insights from Gaia DR3

I. Musella

21/09/2022, 16:40

Thanks to the well known Period-Luminosity relation, Ultra Long Period (ULP) Cepheids, characterized by periods longer than about 80 days, are among the brightest primary indicators to calibrate the cosmic distance ladder, currently at the center of the debate on the Hubble constant tension. In principle, with the advent of next generation facilities, these bright pulsating variables will be...

89. Gaia distances: an opportunity for gauging the asteroseismic accuracy of beta Cephei pulsators

S. Salmon

21/09/2022, 17:00

The β Cephei pulsators are massive main-sequence stars presenting low radial-order oscillations. These latter bear a powerful signature of physical processes at the edge of the convective core and in the radiative envelope, as for e.g. convective overshooting, hydrodynamic or magnetic instabilities. Yet, it is not clear to what extent the seismic inferences describe accurately the structure of...

93. Very young low mass stars in the Milky Way unveiled by DBSCAN and Gaia EDR3. Mapping the young clusters within 1.5 Kpc

L. Prisinzano

With an unprecedented astrometric and photometric data precision, Gaia EDR3 gives us the opportunity to systematically and homogeneously detect and map the low mass populations of the star forming regions (SFRs)/very young clusters in the Milky Way in the optical bands.
We present a catalogue of the young stellar objects (YSOs) identified with Gaia EDR3 data in the solar neighbourhood (within...