Friday 27 September 2024 |
Events for day: Wednesday 18 October 2017 |
14:00 - 15:30 Weekly Seminar The M/L-[Fe/H] relation of globular clusters in M31 galaxy School ASTRONOMY The structural properties, kinematical properties and the M/L ratios of 163 GCs in the M31 galaxy in the near infrared (K-band) and optical (V-band) are derived by Strader etal. (2009, 2011). Their sample of GCs exhibits M/L ratios which are considerably lower than what is predicted from SSP models of GCs with a canonical IMF. In addition, one expects that the M/L ratios of SSP models show a positive correlation with metallicity. In this talk, I will address this discrepancy and will propose solutions which are mainly based on the depletion of low-mass stars either due to dynamical evolution, a metallicity and density-dependent top-heavy IMF, ... 14:00 - 15:00 Weekly Seminar Condensed Matter and Statistical Physics Group Tailoring topological states in silicene using different halogen-passivated Si(111) substrates School PHYSICS Seminar Room (classroom A), Farmanieh Building, IPM ... 14:00 - 15:00 Weekly Seminar Tailoring topological states in silicene using different halogen-passivated Si(111) substrates School NANO SCIENCES Tailoring topological states in silicene using different halogen-passivated Si(111) substrates We investigate the band structure and topological phases of silicene embedded on halogenated Si(111) surface, by virtue of density functional theory and tight-binding calculations. Our results show that the Dirac character of low energy excitations in silicene is almost preserved in the presence of silicon substrate passivated by various halogens. Nevertheless, the combined effects of charge transfer from suspended silicene into the substrate, interlayer interaction between silicene and substrate, and symmetry breaking which origin ... 15:30 - 16:30 Weekly Seminar Generalized Parton Distributions (GPDs) and Probing the 3D Nucleon Structure School PARTICLES AND ACCELERATORS The past two decades have seen an important progress in the research field of 3D imaging of the partonic structure of nucleon with the emergence of the Generalized Parton Distribution (GPDs) formalism and its associated experimental programs. GPDs conceptually introduces in connection with the partonic description of deeply virtual Compton scattering (DVCS) and deeply virtual meson production (DVMP). As with parton distributions, flexible phenomenological parameterizations of GPDs are essential for their extraction from data. In this talk, I will present an introductory to GDPs. Furthermore, I will review the status of the theory and phenom ... |