A Probe of Primordial Gravity Waves and Vorticity

Details A Probe of Primordial Gravity Waves and Vorticity A Probe of Primordial Gravity Waves and Vorticity

1996-09-19

arxiv.org/abs/astro-ph/9609132v1

Phys.Rev.Lett.78:2058-2061,1997

Astronomy and Astrophysics

Astrophysics

8 pages, RevTeX

Scientific paper

10.1103/PhysRevLett.78.2058

A formalism for describing an all-sky map of the polarization of the cosmic microwave background is presented. The polarization pattern on the sky can be decomposed into two geometrically distinct components. One of these components is not coupled to density inhomogeneities. A non-zero amplitude for this component of polarization can only be caused by tensor or vector metric perturbations. This allows unambiguous identification of long-wavelength gravity waves or large-scale vortical flows at the time of last scattering.

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