Microwave anisotropies from texture-seeded structure formation

The cosmic microwave anisotropies in a scenario of large-scale structure formation with cold dark matter (CDM) 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±{}1.2×{}10^-5 and the fluctuations on an angular scale of 10^∘{} are (3.8±{}2.6)×{}10^-5. The COBE results are within about one standard deviation of the typical texture+CDM model discussed in this paper. On {~}2^∘{} angular scale, the fluctuations are significantly larger than recent experimental bounds. Collapsing textures are modeled by spherically symmetric field configurations. This leads to uncertainties of about a factor of 2.