Rosa Consiglio, Olga Sazhina, Giuseppe Longo, Mikhail Sazhin, Franco Pezzella
The number of cosmic strings in the observable universe is relevant in
determining the probability to detect the presence of cosmic strings through
their gravitational signatures. In particular, we refer to the observation of
gravitational lensing events and anisotropy in the CMB radiation induced by
cosmic strings. In this paper a simple method is adopted to obtain an
approximate estimate of the number of segments of cosmic strings, crossing the
particle horizon, which fall inside the visible (i. e. observed) part of the
universe. We show that a different choice of the CDM cosmological model, which
affects volumes slightly, does actually have only a small weight on the
expected number of cosmic string segments
View original:
http://arxiv.org/abs/1112.5186
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