Testing gravity with EG: mapping theory onto observations

C. Danielle Leonard, Pedro G. Ferreira, Catherine Heymans

Research output: Contribution to journalArticlepeer-review


We present a complete derivation of the observationally motivated definition of the modified gravity statistic EG. Using this expression, we investigate how variations to theory and survey parameters may introduce uncertainty in the general relativistic prediction of EG. We forecast errors on EG for measurements using two combinations of upcoming surveys, and find that theoretical uncertainties may dominate for a futuristic measurement. Finally, we compute predictions of EG under modifications to general relativity in the quasistatic regime, and comment on the pros and cons of using EG to test gravity with future surveys.
Original languageEnglish
Pages (from-to)51
JournalJournal of Cosmology and Astroparticle Physics (JCAP)
Issue number12
Publication statusPublished - 1 Dec 2015


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