From 2022, Astronomy and Astrophysics (A&A) is published under a Subscribe to Open model (S2O).
S2O is an alternative subscription model which enables libraries to use their collections budgets to support open access publishing. Every year, existing library customers are asked to continue to subscribe, and when subscribers commit, A&A publishes that year’s content in open access without charging authors an APC.
An announcement is made in the first quarter of every year, following the subscription renewals cycle, regarding the status of the journal.