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Astrophysics > Cosmology and Nongalactic Astrophysics

arXiv:1605.03176 (astro-ph)
[Submitted on 10 May 2016 (v1), last revised 31 Aug 2016 (this version, v2)]

Title:Wave diffraction by a cosmic string

Authors:Isabel Fernández-Núñez, Oleg Bulashenko
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Abstract:We show that if a cosmic string exists, it may be identified through characteristic diffraction pattern in the energy spectrum of the observed signal. In particular, if the string is on the line of sight, the wave field is shown to fit the Cornu spiral. We suggest a simple procedure, based on Keller's geometrical theory of diffraction, which allows to explain wave effects in conical spacetime of a cosmic string in terms of interference of four characteristic rays. Our results are supposed to be valid for scalar massless waves, including gravitational waves, electromagnetic waves, or even sound in case of condensed matter systems with analogous topological defects.
Comments: 5 pages, 6 figures; free access to journal version until September 20, 2016 at this http URL
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO); General Relativity and Quantum Cosmology (gr-qc); Optics (physics.optics)
Cite as: arXiv:1605.03176 [astro-ph.CO]
  (or arXiv:1605.03176v2 [astro-ph.CO] for this version)
  https://doi.org/10.48550/arXiv.1605.03176
Journal reference: Physics Letters A 380 (2016) 2897-2901
Related DOI: https://doi.org/10.1016/j.physleta.2016.07.008

Submission history

From: Oleg Bulashenko [view email]
[v1] Tue, 10 May 2016 11:12:45 UTC (210 KB)
[v2] Wed, 31 Aug 2016 10:13:28 UTC (213 KB)
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