Poster
J. R. C. C. C. Correia, C. J. A. P. Martins
Abstract
Topological defects are a consequence of early Universe phase transitions, formed by means of the Kibble mechanism. A particular type of defect known as a cosmic string is not only a generic consequence of many GUT theories but also benign (ie. not expected to over-close the Universe). The observational imprints of a network of defects critically depend on many details governing energy losses and overall evolution of the network. One particular way to infer (indirectly) the relative importance of different energy loss mechanisms (loop production, radiation emission, etc.) and the velocity dependence of such mechanisms is to compare a large number of simulations at varying expansion rates with the canonical semi-analytical model for string evolution (Velocity dependent One-Scale model). Here we present the most recent calibration using 1032 field theory high resolution simulations of cosmic strings, and present some properties of the network inferred from the calibration itself.
XXIX Encontro Nacional de Estudantes de Astronomia
Lisboa, Portugal
2019 September
