Gravitational waves from accreting systems

Abstract

The recent discovery of gravitational waves has opened a new window in astronomy. Accreting systems are very common in astrophysics and are multifreqeuncy sources, since their emission spans the whole electromagnetic spectrum. Accreting systems in astronomy are also multimessenger sources, since they can emit gravitational waves via a variety of physical mechanisms and because of their intrinsical binary nature. This paper presents a review of the gravitational wave emission of accreting systems at all scales, from cataclysmic variables to active galactic nuclei, showing that the emission occurs over the whole gravitational spectrum.