2024年1月22日发(作者：)

asDepartmentofPhysics,AristotleUniversityofThessaloniki,Thessaloniki54006,as@:///˜tMaxPlanckInstituteforGravitationalPhysics,AlbertEinsteinInstitute,D-14476Golm,@/Articles/Volume2/1999-2kokkotasLivingReviewsinRelativityPublishedbytheMaxPlanckInstituteforGravitationalPhysicsAlbertEinsteinInstitute,GermanyAbstractPerturbationsofstarsandblackholeshavebeenoeofpartic-ularimportancetoday,reviewwepresentthetheoryofquasi-normalmodesofcocussionincludesperturbationsofblackholes(Schwarzschild,Reissner-Nordstr¨om,KerrandKerr-Newman)andrelativisticstars(non-rotatingandslowly-rotating).Thepropertiesofthevariousfamiliesofquasi-normalmodesaredescribed,cesses,aswellasthelimits,ofperturbationtheoryarepresented,anditsroleinrinformationon