For a real Enriques surface Y we prove that every homology class in H_1(Y(R), Z/2) can be represented by a real algebraic curve if and only if all connected components of Y(R) are orientable. Furthermore, we give a characterization of real Enriques surfaces which are Galois-Maximal and/or Z-Galois-Maximal and we determine the Brauer group of any real Enriques surface.
@article{hal-00001385,
author = {Mangolte, Fr\'ed\'eric and Van Hamel, Joost},
title = {Algebraic cycles and topology of real Enriques surfaces},
journal = {HAL},
volume = {1998},
number = {0},
year = {1998},
language = {en},
url = {http://dml.mathdoc.fr/item/hal-00001385}
}
Mangolte, Frédéric; Van Hamel, Joost. Algebraic cycles and topology of real Enriques surfaces. HAL, Tome 1998 (1998) no. 0, . http://gdmltest.u-ga.fr/item/hal-00001385/