Sub-degree Scale Microwave Anisotropies from Cosmic Defects

Details Sub-degree Scale Microwave Anisotropies from Cosmic Defects Sub-degree Scale Microwave Anisotropies from Cosmic Defects

1996-06-16

arxiv.org/abs/astro-ph/9606087v1

Astronomy and Astrophysics

Astrophysics

17 pages, compressed and uuencoded, comprising RevTex file and six colour postcript figures, subdeg1.ps - subdeg6.ps

Scientific paper

10.1086/310384

If current ideas about unified field theories are correct, macroscopic cosmic defects may well exist. The observation of such an entity would have enormous significance for our understanding of fundamental physics. This paper points out a novel observable signature of cosmic texture and global monopoles, namely strong hot spots in the cosmic microwave anisotropy pattern on subdegree scales. This signal should be readily detectable by the next generation of anisotropy mapping experiments. The signature arises from overdensities in the photon-baryon fluid generated by the gravitational attraction of the defects. The angular power spectrum of the anisotropy fluctuations on subdegree scales is also calculated, for cosmic string, global monopoles, and texture.

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