PIRSA:22010091

Searching for dark energy off the beaten track

APA

Vagnozzi, S. (2022). Searching for dark energy off the beaten track . Perimeter Institute. https://pirsa.org/22010091

MLA

Vagnozzi, Sunny. Searching for dark energy off the beaten track . Perimeter Institute, Jan. 25, 2022, https://pirsa.org/22010091

BibTex

          @misc{ pirsa_22010091,
            doi = {},
            url = {https://pirsa.org/22010091},
            author = {Vagnozzi, Sunny},
            keywords = {Cosmology},
            language = {en},
            title = {Searching for dark energy off the beaten track },
            publisher = {Perimeter Institute},
            year = {2022},
            month = {jan},
            note = {PIRSA:22010091 see, \url{https://pirsa.org}}
          }
          

Abstract

Most of the efforts in searching for dark energy (DE) have focused on its gravitational signatures, and in particular on constraining its equation of state. However, there is a lot to be learned about DE by getting off the beaten track. I will first focus on non-gravitational interactions of DE with visible matter, leading to the possibility of "direct detection of dark energy" (analogous to direct detection of dark matter): I will argue that such interactions can and potentially may already have been detected in experiments such as XENON1T, while discussing complementary cosmological and astrophysical signatures. I will then discuss early- and late-time consistency tests of LCDM, and how these may shed light on (early and late) DE in relation to the Hubble tension. I will present two such tests based on the early ISW effect and the ages of the oldest astrophysical objects in the Universe.