The Milky Way Revealed by Gaia: The Next Frontier

Session

WG2. The Life and Death of Stars (II). Chair: Ivanka Stateva

5 Sept 2023, 14:30

University of Barcelona (Institute of Cosmos Sciences (ICCUB-IEEC))

43. A Multi-wavelength Study of the Galactic Point Sources in the MeerKAT Galactic Plane Survey with GAIA DR3

Okwudili Daniel Egbo (University of Cape Town/South African Astronomical Observatory)

05/09/2023, 14:30

Contributed talk

The MeerKAT Galactic Plane Survey is a radio continuum survey conducted in the L band (~1.4 GHz) in the Galactic plane, covering a wide range of galactic longitudes, spanning from 0 to 60 degrees and 250 to 360 degrees and mostly within a latitude range of |b| ≤ 1.5 degrees. The survey resulted in the detection of approximately 5×105 sources. In this study, we present our analysis of the...

74. The problem of variability of chemically peculiar Am stars

Natalia Posiłek (University of Wrocław)

05/09/2023, 14:45

Contributed talk

The metallic-line (Am) stars, classified as chemically peculiar A and early F stars, exhibit unique spectral characteristics with weak Ca II K and Sc lines, along with strong Fe-group features compared to their H-line spectral type. These stars are located in the classical instability zone, where pulsating delta Scuti stars lie. For many years, it was believed that classical Am stars cannot...

89. The white dwarf population revealed by Gaia

Santiago Torres Gil (Universitat Politècnica de Catalunya)

05/09/2023, 15:00

Contributed talk

The Gaia mission has brought an unprecedented revelation in our understanding of the white dwarf population of the Solar neighborhood. The excellent astrometry and photometry provided by DR2 and eDR3 have unveiled unexpected patterns in the Hertzsprung-Russell diagram, such as the bifurcation or the so-called Q-branch. The analysis and comprehension of such features rely on an accurate...

81. Kinematic study of the Orion Complex in the GAIA era

Sergio Sánchez-Sanjuán (Instituto de Astronomía - Universidad Nacional Autónoma de México)

05/09/2023, 15:15

Contributed talk

The study of Young Stellar Clusters (YSCs) has gained relevance in modern astrophysics thanks to the role played by large scale surveys with unprecedented precision. In particular, in the solar neighborhood, multiple star-forming regions will be used to characterize YSCs in terms of kinematics, stellar masses and chemical composition, the main ingredients to understand the dynamical evolution...

83. Fine structure in the Sigma Orionis cluster revealed by Gaia DR3

Marusa Zerjal (Instituto de Astrofísica de Canarias)

05/09/2023, 15:30

Contributed talk

Sigma Orionis is an open cluster in the nearest giant star formation site - Orion. Its youth (2-4 Myr), little reddening and relative vicinity make it an important benchmark cluster to study stellar and substellar formation. I will present the first detailed kinematic study of the Sigma Orionis cluster with the Gaia DR3 data. It reveals a clear substructure of this complex region with proper...