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Speaker: Andrea Bonfanti (Austrian Academy of Sciences, Graz, Austria) Title: Insights into the M-dwarf radius and density valley Abstract M dwarfs are quite attractive in the domain of exoplanetology: Because of their low mass and small radius, it is easier to detect low-mass planets with the transit method and the radial velocity (RV) technique. In addition, it is more likely that the

 

 

 

Speaker Dominique Meyer (Institute of Space Sciences ICE, CSIC, Campus UAB, Barcelona, Spain) Titolo: “Supernova remnants of massive stars” Abstract: Stars more massive than our Sun by at least a factor of ten are rare but seminal objects in galaxies such our Milky Way. Their powerful radiation, stellar winds, and explosive deaths are dominant engines driving the cycle of matter in the interstellar medium

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Speaker: F. Mirabello  (INAF) Titolo: Il Cerchio di Ramsden, un prodigio tecnologico Abstract:  IL CERCHIO DI RAMSDEN, UN PRODIGIO TECNOLOGICO  Più di 30 anni fa, Paolo Brenni (1954-2021), esperto di strumentazione scientifica di fama internazionale, si recava a Palermo presso l’Osservatorio Astronomico “G. S. Vaiana” per valutare lo stato conservativo del più importante strumento storico dell’Osservatorio, il cerchio astronomico altazimutale realizzato