Vorticity perturbations and isotropy of the cosmic microwave background

Details Vorticity perturbations and isotropy of the cosmic microwave background Vorticity perturbations and isotropy of the cosmic microwave background

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976a%26a....49..205a&link_type=abstract

Astronomy and Astrophysics, vol. 49, no. 2, June 1976, p. 205-209. Research supported by the Consiglio Nazionale delle Ricerche

Astronomy and Astrophysics

Astrophysics

8

Background Radiation, Galactic Clusters, Isotropy, Microwaves, Universe, Vorticity, Cosmology, Extraterrestrial Radiation, Perturbation Theory, Red Shift, Temperature Distribution, Turbulent Diffusion

Scientific paper

The paper investigates the effect of vorticity perturbations of an arbitrary Robertson-Walker universe on the isotropy of the cosmic microwave background. The predicted temperature variations are compared with the upper limits recently found by Parijskij (1974). In this way, an upper limit on the present vorticity on scales of the order of 10 Mpc is obtained which is only marginally consistent with the value suggested by de Vaucouleurs (1971) and de Vaucouleurs and Peters (1968).

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