Detecting prolonged activity minima in binary stars. The case of ${\zeta }^2$ Ret

M. Flores, M. Jaque Arancibia, R. V. Ibañez Bustos +7

Context. It is well known that from 1645 to 1715 solar activity was notably low and the number of sunspots was extremely reduced. This epoch is known as the Maunder Minimum (MM). T…