I will discuss the status of the LCDM cosmological model and propose a new test that can unambiguously distinguish cold dark matter from other dark matter candidates such as warm dark matter. This test could potentially rule the standard model.
We review the recent constraints on the primordial tensor to scalar ratio from the combination of Planck and operating CMB polarization experiments. We discuss the present and future B-mode observations and the expectations for early Universe, neutrino masses and dark energy.
The latest years have been dense with new developments in the search for the sources of Galactic cosmic rays (CRs): 1) The detection of features in the spectra of some primary chemicals opened new questions on the propagation of CRs in the Galaxy. 2) Precise measurements by AMS-02 of secondary nuclei are providing unique information about the transport processes over a larger energy domain 3)...
Ultralight bosons constitute well motivated dark matter (DM) candidates. The most popular candidates being the axion-like particles (ALPs) with very small masses typically arising in string theory. In this scenario, the uncertainty principle prevents the formation of structures on small scales. Indeed, if DM is made of very light particles, the corresponding number density is so high that the...
Observations of galaxies and galaxy clusters in the local universe cannot account for the total baryon content inferred from measurements of the cosmic microwave background and from big bang nucleosynthesis [1,2]. Locating the missing baryons has been one of the major challenges in cosmology. Cosmological simulations predict that they are spread throughout filamentary structures in the cosmic...
