Microwave Anisotropies from Texture Seeded Structure Formation

Details Microwave Anisotropies from Texture Seeded Structure Formation Microwave Anisotropies from Texture Seeded Structure Formation

1993-11-17

arxiv.org/abs/astro-ph/9311040v1

Phys.Rev.D49:681-691,1994

Astronomy and Astrophysics

Astrophysics

16p, LaTex, ZU-TH 32/92

Scientific paper

10.1103/PhysRevD.49.681

The cosmic microwave anisotropies in a scenario of large scale structure formation with cold dark matter and texture are discussed and compared with recent observational results of the COBE satellite. A couple of important statistical parameters are determined. The fluctuations are slightly non gaussian. The quadrupole anisotropy is $1.5\pm 1.2\times 10^{-5}$ and the fluctuations on a angular scale of 10 degrees are $ (3.8\pm 2.6)\times 10^{-5}$. The COBE are within about one standard deviation of the typical texture + CDM model discussed in this paper. Furthermore, we calculate fluctuations on intermediate scales (about 2 degrees) with the result $\De T/T(\theta \sim 2^o) = 3.9\pm 0.8)\times 10^{-5}$. Collapsing textures are modeled by spherically symmetric field configurations. This leads to uncertainties of about a factor of~2.

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