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Stars are massive resonators that may be used as gravitational-wave (GW)detectors with isotropic sensitivity. New insights on stellar physics are beingmade possible by asteroseismology, the study of stars by the observation oftheir natural oscillations. The continuous monitoring of oscillation modes instars of different masses and sizes (e.g., as carried out by NASA's Keplermission) opens the possibility of surveying the local Universe for GWradiation. Red-giant stars are of particular interest in this regard. Since themean separation between red giants in open clusters is small (a few lightyears), this can in principle be used to look for the same GW imprint on theoscillation modes of different stars as a GW propagates across the cluster.Furthermore, the frequency range probed by oscillations in red giantscomplements the capabilities of the planned eLISA space interferometer. Wepropose asteroseismology of red giants as a novel approach in the search forgravitational waves.

Asteroseismology of red-giant stars as a novel approach in the search for gravitational waves