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Title: THE FLOW AROUND A COSMIC STRING. I. HYDRODYNAMIC SOLUTION

Abstract

Cosmic strings are linear topological defects which are hypothesized to be produced during inflation. Most searches for strings have relied on the string’s lensing of background galaxies or the cosmic microwave background. In this paper, I obtained a solution for the supersonic flow of collisional gas past the cosmic string which has two planar shocks with a shock compression ratio that depends on the angle defect of the string and its speed. The shocks result in the compression and heating of the gas and, given favorable conditions, particle acceleration. Gas heating and over-density in an unusual wedge shape can be detected by observing the Hi line at high redshifts. Particle acceleration can occur in the present-day universe when the string crosses the hot gas contained in galaxy clusters and, since the consequences of such a collision persist for cosmological timescales, could be located by looking at unusual large-scale radio sources situated on a single spatial plane.

Authors:
 [1];  [2]
  1. Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
  2. (Sweden)
Publication Date:
OSTI Identifier:
22522439
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 804; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCELERATION; COMPRESSION; COMPRESSION RATIO; COSMOLOGY; DENSITY; GALAXIES; GALAXY CLUSTERS; HEATING; HYDRODYNAMICS; INFLATIONARY UNIVERSE; MATHEMATICAL SOLUTIONS; RED SHIFT; RELICT RADIATION; SHOCK WAVES; STRING THEORY; SUPERSONIC FLOW; TOPOLOGY; UNIVERSE

Citation Formats

Beresnyak, Andrey, and Nordita, KTH Royal Institute of Technology and Stockholm University, SE-10691. THE FLOW AROUND A COSMIC STRING. I. HYDRODYNAMIC SOLUTION. United States: N. p., 2015. Web. doi:10.1088/0004-637X/804/2/121.
Beresnyak, Andrey, & Nordita, KTH Royal Institute of Technology and Stockholm University, SE-10691. THE FLOW AROUND A COSMIC STRING. I. HYDRODYNAMIC SOLUTION. United States. doi:10.1088/0004-637X/804/2/121.
Beresnyak, Andrey, and Nordita, KTH Royal Institute of Technology and Stockholm University, SE-10691. Sun . "THE FLOW AROUND A COSMIC STRING. I. HYDRODYNAMIC SOLUTION". United States. doi:10.1088/0004-637X/804/2/121.
@article{osti_22522439,
title = {THE FLOW AROUND A COSMIC STRING. I. HYDRODYNAMIC SOLUTION},
author = {Beresnyak, Andrey and Nordita, KTH Royal Institute of Technology and Stockholm University, SE-10691},
abstractNote = {Cosmic strings are linear topological defects which are hypothesized to be produced during inflation. Most searches for strings have relied on the string’s lensing of background galaxies or the cosmic microwave background. In this paper, I obtained a solution for the supersonic flow of collisional gas past the cosmic string which has two planar shocks with a shock compression ratio that depends on the angle defect of the string and its speed. The shocks result in the compression and heating of the gas and, given favorable conditions, particle acceleration. Gas heating and over-density in an unusual wedge shape can be detected by observing the Hi line at high redshifts. Particle acceleration can occur in the present-day universe when the string crosses the hot gas contained in galaxy clusters and, since the consequences of such a collision persist for cosmological timescales, could be located by looking at unusual large-scale radio sources situated on a single spatial plane.},
doi = {10.1088/0004-637X/804/2/121},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 804,
place = {United States},
year = {2015},
month = {5}
}