Dautcourt's (1969) analysis of the temperature fluctuations induced in the microwave background by long-wavelength gravitational waves is extended by treating both negative and positive curvatures and by considering a perturbed matter- and radiation-filled Robertson-Walker universe in the extreme case where the pregalactic matter is fully ionized. A lower limit to the temperature fluctuations at the last-scattering surface is evaluated, and an upper limit to the present energy density in gravitational waves with wavelengths of 3 to 10 Mpc is obtained by comparison with the observed upper limit to the temperature fluctuations of 0.000715 over small angular scales (about 2 deg). The results obtained show that the 'missing mass' in clusters of galaxies cannot be in the form of megaparsec-length gravitational waves, that a single wave induces a quadrupole angular dependence in the temperature variation of the blackbody radiation, and that the energy density in a gravitational wave with a wavelength of about 10 Mpc is probably less than 0.005 of the critical energy density.
|Titolo:||Long wavelength gravitational waves and the fine scale anisotropy of the cosmic microwave background|
|Data di pubblicazione:||1978|
|Citazione:||Long wavelength gravitational waves and the fine scale anisotropy of the cosmic microwave background / Anile A M; Motta S. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - 184(1978), pp. 319-326.|
|Appare nelle tipologie:||1.1 Articolo in rivista|