ºÚÁÏÉç

Geons are localized horizonless objects formed by gravitational waves held together by the gravitational attraction of their own field energy. If there is a negative cosmological constant, the spacetime of geons asymptotically approaches the anti-de Sitter (AdS) metric. AdS geons are time-periodic regular localized vacuum solutions without any radiation loss at infinity. A perturbative construction in terms of an amplitude parameter shows that there are one-parameter families of AdS geon solutions emerging from combinations of identical-frequency linear modes of the system. The five AdS geon families that emerge from the lowest frequency modes will be presented.