Cosmic backgrounds from the radio to the far-infrared: recent results
  and perspectives from cosmological and astrophysical surveys
  Cosmological and astrophysical surveys in various wavebands, in particular
from the radio to the far-infrared, offer a unique view of the universe's
properties and the formation and evolution of its structures. After a preamble
on the so-called tension problem, which occurs when different types of data are
used to determine cosmological parameters, we discuss the role of fast radio
bursts in cosmology, in particular for the missing baryon problem, and the
perspectives from the analysis of the 21 cm redshifted line from neutral
hydrogen. We then describe the Planck Legacy Archive, its wealth of scientific
information and next developments, and the promising perspectives expected from
higher resolution observations, in particular for the analysis of the thermal
Sunyaev-Zel'dovich effect. Three cosmological results of the Planck mission are
presented next: the implications of the map of Comptonization fluctuations, the
dipole analysis from cross-correlating cosmic microwave background anisotropy
and Comptonization fluctuation maps, and the constraints on the primordial
tensor-to-scalar perturbation ratio. Finally, we discuss some future
perspectives and alternative scenarios in cosmology, such as the study of the
Lorentz invariance violation with the cosmic microwave background polarization,
the introduction of new gravitational degrees of freedom to solve the dark
matter problem, and the exploitation of the magnification bias with
high-redshift sub-millimeter galaxies to constrain cosmological parameters.
