We discuss the effects on the cosmic microwave background ( CMB ) , cosmic infrared background ( CIB ) , and thermal Sunyaev-Zeldovich effect due to the peculiar motion of an observer with respect to the CMB rest frame , which induces boosting effects .
After a brief review of the current observational and theoretical status , we investigate the scientific perspectives opened by future CMB space missions , focussing on the Cosmic Origins Explorer ( CORE ) proposal .
The improvements in sensitivity offered by a mission like CORE , together with its high resolution over a wide frequency range , will provide a more accurate estimate of the CMB dipole .
The extension of boosting effects to polarization and cross-correlations will enable a more robust determination of purely velocity-driven effects that are not degenerate with the intrinsic CMB dipole , allowing us to achieve an overall signal-to-noise ratio of 13 ; this improves on the Planck detection and essentially equals that of an ideal cosmic-variance-limited experiment up to a multipole \ell \simeq 2000 .
Precise inter-frequency calibration will offer the opportunity to constrain or even detect CMB spectral distortions , particularly from the cosmological reionization epoch , because of the frequency dependence of the dipole spectrum , without resorting to precise absolute calibration .
The expected improvement with respect to COBE-FIRAS in the recovery of distortion parameters ( which could in principle be a factor of several hundred for an ideal experiment with the CORE configuration ) ranges from a factor of several up to about 50 , depending on the quality of foreground removal and relative calibration .
Even in the case of \simeq 1 % accuracy in both foreground removal and relative calibration at an angular scale of 1 ^ { \circ } , we find that dipole analyses for a mission like CORE will be able to improve the recovery of the CIB spectrum amplitude by a factor \simeq 17 in comparison with current results based on COBE-FIRAS .
In addition to the scientific potential of a mission like CORE for these analyses , synergies with other planned and ongoing projects are also discussed .