The Colloquium takes place every Wednesday at 11:15 AM - Warsaw Copernicus Astronomical Centre online by means of Zoom platform. The Colloquium is given in English and chaired by dr Stanisław Bajtlik (bajtlik@camk.edu.pl). People from outside of the Copernicus Center are very welcome to participate. For technical detailes please contact Dr. Stanislaw Bajtlik.
Francesco Flammini Dotti (Heidelberg University)
The dynamical evolution of massless objects in star clusters aims to explore their dynamics during the dynamical evolution of such structures, which is not easy observable in star clusters, and still not possible in dense star clusters such as globular clusters. In a star cluster, the main phenomenon we are going to focus on are the mass segregation and core collapse. I will first introduce previous works that looked into the motion of these objects, and then I will numerically explore the dynamical evolution of such objects, varying the number density of the hosting star cluster. As a final point, I will try to confute if the relative large abundance of free-floating planets in our galaxy is due to their ejected ree-floating planets. I will use NBODY6++GPU-ML (a N-body code which performs simulations with a large number of particles and massless particles, i.e., star clusters with free-floating planets) The results pinpoint how the massless particles are not particularly affected by mass segregation, but only by the central gravitational evolution of the core of the star cluster, suggesting that those particles, in relatively dense star clusters, are ejected only at much larger timescales.
Journal Club takes place on Mondays at 11:15 AM in the Seminar Room. The presentation is given in English and is chaired by Journal Club Coordinators. Anyone interested in giving a Journal Club talk is encouraged to contact the email: journalclub(@camk.edu.pl).
Parikshit Partha Biswas (NCAC, Warsaw)
Based on: https://ui.adsabs.harvard.edu/abs/2025MNRAS.537L..55S/abstract
