New Maps of the Dark Side
PT-CERN Call 2021/1
Universidade do Porto
Centro de Astrofísica da Universidade do Porto
The observational evidence for the acceleration of the universe demonstrates that canonical theories of cosmology and particle physics are incomplete. New physics is waiting to be discovered, and forthcoming astrophysical facilities must identify it. The source of acceleration has a low-redshift behaviour akin to a cosmological constant, but current data provides limited information on its high-redshift behaviour and possible interactions. Tackling the dark energy enigma requires extending the redshift range where its behaviour can be mapped. New facilities, such as Euclid, the ELT, and the SKA will enable this, increasing the range and sensitivity of current probes and allowing entirely new tests. This thesis will carry out a systematic exploration of the landscape of physically viable dark energy paradigms and provide optimal discriminating tests. It will focus on Euclid (which the student will join) and broaden to explore synergies and probe combinations with the SKA and ELT-HIRES.