On the number of cosmic strings
Abstract
The number of cosmic strings in the observable Universe is relevant in determining the probability of detecting such cosmic defects through their gravitational signatures. In particular, we refer to the observation of gravitational lensing events and anisotropy in the cosmic microwave background (CMB) radiation induced by cosmic strings. In this article, a simple method is adopted to obtain an approximate estimate of the number of segments of cosmic strings crossing the particle horizon that fall inside the observed part of the Universe. We show that there is an appreciable difference in the expected number of segments that differentiates cosmic strings arising in Abelian Higgs and Nambu–Goto models and that a different choice of setting for the cosmological model can lead to significant differences in the expected number of cosmic string segments. Of this number, the fraction that are realistically detectable may be considerably smaller.
Additional Information
© 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2014 January 7. Received 2013 December 15; in original form 2013 January 31. First published online: March 1, 2014. The authors thank Cosimo Stornaiolo for helpful discussions. The research was financially supported by the grant RFFI 10-02-00961a. The work was carried out as part of the project No. 14.740.11.0085 of the Ministry of Education. RC acknowledges partial financial support by the NASA–Jet Propulsion Laboratory and the kind hospitality of the California Institute of Technology, where this work was partly carried out. Furthermore the authors acknowledge the use of the Legacy Archive for Microwave Background Data Analysis (LAMBDA), part of the High Energy Astrophysics Science Archive Center (HEASARC). HEASARC/LAMBDA is a service of the Astrophysics Science Division at the NASA Goddard Space Flight Center.Attached Files
Published - MNRAS-2014-Consiglio-3213-24.pdf
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Additional details
- Eprint ID
- 45994
- Resolver ID
- CaltechAUTHORS:20140530-094825228
- 10-02-00961a
- RFFI
- 14.740.11.0085
- Ministry of Education
- NASA/JPL
- Created
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2014-05-30Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field