Скачать или смотреть Backlighting the dark universe with the cosmic microwave background

IAP weekly specialised seminars / Friday 28 February 2020:
Anthony Challinor, Institute of Astronomy, University of Cambridge (Cambridge, Royaume-Uni)



The cosmic microwave background (CMB) fluctuations are not only our cleanest probe of the early universe but also carry imprints of structures in the late-time universe through gravitational and scattering interactions. In particular, the CMB is gravitationally lensed by large-scale structure. This is both a blessing and a curse: it allows us to reconstruct the clustering of matter from CMB surveys at redshifts and scales that are difficult to access with other tracers, but lensing also confuses our view of the early universe. In this talk, I will discuss the great progress that has been made recently in reconstructing and exploiting the lensing signal from the CMB, and in attempts to remove it to sharpen our view of the early universe. I will also briefly look forward to what can be achieved in this field with forthcoming surveys, such as the Simons Observatory.


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