2000/05/06 by C. R. Contaldi, Carlo Contaldi, Contaldi, C. R.
Computer Science · Physics and Astronomy · #Astrophysics (astro-ph) #Computational Physics and Python Applications #Cosmology and Gravitation Theories #FOS: Physical sciences #Solar and Space Plasma Dynamics #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0005115
4 pages, 4 figures, Revtex, submitted to PRL
arxiv created 2000/05/06 · openalex publication_date 2000/05/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/04
We show how two simple modifications to the standard cosmic string scenario for structure formation compare to the recently released Boomerang data set. Namely we consider pure string closed models and mixed models where both inflation and strings are responsible for the perturbations. In the closed models we find that pure string models would require a universe with roughly ΩM=0.8, ΩΛ=1.6 to agree with the peak position revealed by the data and in agreement with the SNIa data. In the hybrid scenario with local strings we find that we require even more tilt and baryon content (ns∼ 0.8, Ωb=0.08, H0=70) to match the data than with pure inflation models. The case with global strings fares better with a standard period of ΛCDM inflation and a ∼30% contribution from strings being in good agreement with the data.