Powered by Indico
v3.2.3
From the discovery of the first confirmed exoplanet in 1995, astronomers have attempted to look for different planetary systems in our galaxy. Most of the planetary systems were observed in field stars, and are very rarely found in star clusters to observational constraints. The dynamical evolution of planetary systems in dense stellar environment is shown in star clusters, the birth places of stars. In these environments, the gravitational interactions with neighbouring stars can substantially affect the archi- tecture of planetary systems. The majority of star are believed to form in crowded environments. These stellar aggregates form and then dissolve within few million years, while others remain gravitationally bound even for billions of years: these aggregations are respectively open clusters and globular clusters. It is now also accepted that a large fraction of stars in our Milky Way may host planetary companions. We analyse the star cluster environment's effect on the evolution of planetary systems, by varying different star cluster parameters (such as the stellar density). Moreover, we show the influence of an intermediate-mass black hole (IMBH) in the cluster centre. We focus on the evolution of multi-planet planetary systems, free-floating planets (i.e., planets not gravitationally bound to a star) and single-planet systems. We find that the star cluster environment can have a significant influence on the dynamics of planetary systems, where the stellar density and the presenece of a central IMBH seems the most important factors in disrupting planetary systems, while the ejection of stars is favoured when the star cluster's central region potential is changed.
Francesco is born in Italy, Rome. Francesco obtained his undergraduate degree in Physics from Università Tor Vergata and his masters degree in Astronomy from University of Padua, both in Italy. He is finalising (I will technically wait for my diploma, so your choice on how to put this in my bio) his Ph.D degree at Liverpool University and Xi'an Jioatong-Liverpool University (in Suzhou, Jiangsu). His current research focuses on the long-time dynamical evolution of the planetary system in star clusters, and on how such environments affect the orbital architecture of planetary systems.
Zoom link: https://zoom.com.cn/j/67413336592 (code: 870010)