The large-scale structure of the universe commonly refers to the distribution of galaxies at scales above 100Mpc, spanning across a wide range of redshifts, 0<z<3.
2023
The quality of GaiaDR3 proper motions make them suitable for mapping for the first time the 3D velocity field of the Large Magellanic Cloud disc kinematics. These maps show a high degree of complexity and comparison with controlled N-body simulations becomes essential.
The gravitational interaction between the Large Magellanic Cloud (LMC) and the Small Magellanic Cloud is evident when GaiaDR3 reveals the shape of the Magellanic bridge in the young stellar evolutionary phase and the velocity flow also in older and evolved populations.
The radial and residual tangential velocity map in the Large Magellanic Cloud bar with GaiaDR3 data shows that the expected quadrupole pattern is asymmetric. We plan to analyse the cause of asymmetries using KRATOS simulations, a suite of 24 LMC-like N-body simulations.
The quark-gluon plasma is a new state of matter that can be formed by colliding heavy ions at ultrarelativistic velocities. From all the particles formed in these collisions, heavy quarkonium is one of the most promosing probes to obtain information about this new state of matter. One of the most succesful approaches to the study of the evolution of quarkonium in a medium is to model it as a Markovian open quantum system. Recently, it has been found using this approach that regeneration is crucial to reproduce experimental data on quarkonium excited states.
We propose to study the reaction pi- p —> pi- eta p, whose data have been collected by the COMPASS collaboration.Â
The goal is to develop the so-called ``finite-energy sum rules’’ for this reaction, that will allow to constraints better the production of exotic meson.Â
The student will first understand these constraints on a toy model (based on Veneziano amplitudes) and will subsequently apply them to the reaction under consideration.Â
Gamma-ray emitting binaries hosting a massive star are among the most efficient and powerful accelerators of the Galaxy. The closest vicinity of the binary is believed to be the region where electrons (and possibly protons and nuclei) are accelerated, reaching in some cases energies approaching 100 TeV. This implies that these sources are potential Pevatrons, in particular if protons and nuclei are also accelerated, as they are less affected by energy losses than electrons, close to the binary.