Reconstructing Patchy Reionization with Deep Learning

Understand

The precision anticipated from next-generation cosmic microwave background (CMB) surveys will create opportunities for characteristically new insights into cosmology.

• Secondary anisotropies of the CMB will have an increased importance in forthcoming surveys, due both to the cosmological information they encode and the role they play in obscuring our view of the primary fluctuations.
• Quadratic estimators have become the standard tools for reconstructing the fields that distort the primary CMB and produce secondary anisotropies.
• While successful for lensing reconstruction with current data, quadratic estimators will be sub-optimal for the reconstruction of lensing and other effects at the expected sensitivity of the upcoming CMB surveys.