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An analysis is given of thermoelastic noise (thermal noise due tothermoelastic dissipation) in finite sized test masses of laser interferometergravitational-wave detectors. Finite-size effects increase the thermoelasticnoise by a modest amount; for example, for the sapphire test masses tentativelyplanned for LIGO-II and plausible beam-spot radii, the increase is less than orof order 10 per cent. As a side issue, errors are pointed out in the currentlyused formulas for conventional, homogeneous thermal noise (noise associatedwith dissipation which is homogeneous and described by an imaginary part of theYoung's modulus) in finite sized test masses. Correction of these errorsincreases the homogeneous thermal noise by less than or of order 5 per cent forLIGO-II-type configurations.Comment: 10 pages and 3 figures; RevTeX; submitted to Physical Review

Thermoelastic noise and homogeneous thermal noise in finite sized gravitational-wave test masses