WST - the Wide-field Spectroscopic Telescope: surveying the Universe in the 2040’s and beyond

Session

Origin of the Solar System, planets, stars and the Milky Way

11 Mar 2025, 09:00

Auditorium Nazionale "Ernesto Capocci" (INAF - Osservatorio Astronomico di Capodimonte)

137. Investigation of Solar System objects with WST

Alessandra Migliorini (INAF)

11/03/2025, 09:00

The optical band is an interesting spectral region to explore the solar system objects. In this range,
indeed, it is possible to investigate properties of several molecules that are of interest for comets and
distant objects, like Kuiper Belt Objects (KBOs).
WST, in its present configuration, allows one to cover emissions from a list of radicals, including CN,
N2
+, CO+, C2, NH2, and OI,...

83. Towards the characterization of planet-host stars with WST from future missions: the case of Ariel

Maria Tsantaki (Istituto Nazionale di Astrofisica (INAF))

11/03/2025, 09:20

Most of our current understanding of planet formation mechanisms is based on the correlations of stellar parameters with planet frequency and planet properties. In the advent of new missions dedicated to planet detection in vast numbers, the precise and uniform characterization of the host population is crucial. The WST is the ideal instrument to observe planet hosts from Gaia (tens of...

125. Young stellar populations: the origin of stars and planets

Mario Giuseppe Guarcello (Istituto Nazionale di Astrofisica (INAF))

11/03/2025, 09:35

Star and planet formation are complex phenomena, whose outcomes depend on physical processes occurring across a wide range of scales. This complexity is reflected in the diverse phenomena that characterize the early pre-main sequence phase of stars and their disks, including gas accretion onto the central star, rapid and collimated jets, steady and slow outflows, and intense, rapidly variable...

96. Tracing the Evolution of Young Stellar Populations with the Wide-field Spectroscopic Telescope

Giuseppe Germano Sacco (Istituto Nazionale di Astrofisica (INAF))

11/03/2025, 09:55

Young stellar populations hold the key to understanding the early phases of star formation, the impact of stellar feedback, and the processes that shape galactic structure over time. By mapping the kinematics and chemical compositions of stars across different environments, we can trace their origins, dynamical evolution, and eventual dispersal into the field. The WST will provide an...

102. Exploiting large multiplex spectroscopic surveys of young clusters with neural networks

Dr Da Eun Kang (UniBo)

11/03/2025, 10:10

Most of what we know of the first stages of stellar evolution and planet formation is derived from observations of young stars in the Solar Neighborhood, yet most stars and planetary systems form in clusters, and there is evidence that the Solar System itself formed in a clustered environment. In the last decades, we have progresed significantly in our understanding of star formation in...

126. Three-dimensional structure and chemo-dynamical evolution of the Milky Way

Eloisa Poggio (INAF - Osservatorio Astrofisico di Torino)

11/03/2025, 10:25

Galactic studies are currently undergoing a renaissance, thanks to the wealth of data from the Gaia satellite and ground-based surveys. Stellar positions, motions and chemical abundances have been mapped with unprecedented detail. Vertical disturbances, streaming motions, wave-like features and arches in the velocity space have been revealed on a large scale, triggering new interest and...

91. Tracing Milky Way spiral arms with High-Resolution spectroscopy of Classical Cepheids

Erasmo Trentin (Istituto Nazionale di Astrofisica (INAF))

11/03/2025, 10:45

Classical Cepheids (DCEPs) are crucial for calibrating the extragalactic distance ladder, ultimately enabling the determination of the Hubble constant through the period-luminosity (PL) and period-Wesenheit (PW) relations that they exhibit. The purpose of the C-MetaLL survey is to understand how the PL and PW relations depend on metallicity. The DCEPs are also very important tracers of the...

77. Towards Understanding the Milky Way's Matter Field and Dynamical Accretion History based on GS^3 Hunter and WST

Dr Haifeng Wang (University of Padova)

We present a novel deep-learning-based method, named Galactic-Seismology Substructures and Streams Hunter (GS3 Hunter), designed to search for substructures and streams in stellar kinematics data. GS3 Hunter combines Siamese neural networks to transform phase space information with the K-means algorithm for clustering. As a validation test, we apply GS3 Hunter to a subset of the Feedback in...