LXVII Congresso Annuale della Società Astronomica Italiana

Sessione

La Galassia e il Gruppo Locale

4 mag 2026, 14:30

L'Aquila

136. Decoding the Galaxy’s history with high-resolution stellar spectroscopy

Magrini, Laura (Istituto Nazionale di Astrofisica (INAF))

04/05/26, 14:30

La Galassia e il Gruppo Locale

High-resolution stellar spectroscopy, combined with precise astrometry from Gaia, has revolutionized our understanding of both the formation and evolution of the Milky Way and stellar nucleosynthesis. In this talk, I will present recent progress in mapping the Galaxy’s large-scale chemical structure over time, including radial metallicity gradients and spiral patterns, and explore how stellar...

140. Unveiling the ultra-faint dwarf galaxies: exploring the low-luminosity end of the galaxy population

Gatto, Massimiliano (Istituto Nazionale di Astrofisica (INAF))

04/05/26, 14:55

The faint end of the galaxy luminosity function represents one of the most powerful yet observationally challenging windows onto galaxy formation and evolution. Ultra-faint dwarf (UFD) galaxies — the least luminous, most dark matter-dominated, and chemically most primitive stellar systems known — are fossil relics of the early universe, offering unique constraints on cosmological models,...

189. The unexpected stellar populations of the Milky Way's satellite Fornax dSph

Dall'Ora, Massimo (Istituto Nazionale di Astrofisica (INAF))

04/05/26, 15:15

Building upon the seminal work of Searle & Zinn (1978) and within the framework of the Λ-CDM paradigm, the Milky Way (MW) halo is understood to have formed through the progressive and ongoing accretion of smaller sub-galactic fragments. This hierarchical assembly can be empirically tested via Near-Field Cosmology, specifically by comparing theoretical structural predictions with star-by-star...

191. Challenging the i-process paradigm in CEMP-rs stars: new insights from TYC 6044-714-1

Vescovi, Diego (Istituto Nazionale di Astrofisica (INAF))

04/05/26, 15:30

Carbon-Enhanced Metal-Poor (CEMP) stars are fundamental tracers for Galactic archaeology, providing a unique window into the nucleosynthetic processes that shaped the early Milky Way. A key challenge in this field is the interpretation of CEMP-rs stars, whose chemical patterns are often attributed to the intermediate ($i$-) process. However, distinguishing between an $i$-process origin and a...

177. Probing the Milky Way's Assembly History using RR Lyrae Stars

Luongo, Emanuela (Istituto Nazionale di Astrofisica (INAF))

04/05/26, 15:45

The dual role of RR Lyrae (RRL) stars as tracers of ancient merging events and high-precision distance indicators is fundamental to investigating the evolutionary history of the Milky Way (MW). Their distribution in the Galactic Halo and Globular Clusters provides a unique opportunity to trace interactions with satellite galaxies. This study investigates the origin of the Oosterhoff dichotomy,...