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OATS-UNI/TS SEMINAR
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Speaker: Katia Biazzo (INAF - OACN)

Title: Young populations in the large-scale Gould Belt structure
Date: Wednesday, March 7th, 2012
Time: 11:30
Venue: Villa Bazzoni
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Abstract: The star formation history in the solar vicinity and the origin of the Gould Belt are still not well constrained. In this context, I present a study of the large-scale spatial distribution of ROSAT X-ray sources in about 5000 square deg field centered on Orion, where the astrophysical properties of the optical counterparts across the Gould Belt are analyzed. The spectroscopic follow-up and comparison with galactic model predictions reveal that the X-ray selected stellar population is characterized by three distinct components, whose analysis is important to investigate the star formation scenario, to trace the chemical composition of the solar neighborhood and Galactic thin disk in recent times, and to investigate the metallicity-planet connection in the early stages of planet formation. I will illustrate the emergent picture from this study, giving a hint of what we can obtain in the near future thanks to new-generation high-resolution spectrographs, like ESPRESSO.
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Contact: Stefano Cristiani (OATS)