scholarly journals Stochastic gravitational wave background generated by cosmic string networks: Velocity-dependent one-scale model versus scale-invariant evolution

2013 ◽  
Vol 88 (2) ◽  
Author(s):  
L. Sousa ◽  
P. P. Avelino
Keyword(s):  
Gravitational Wave ◽  
Cosmic String ◽  
Scale Model ◽  
Scale Invariant ◽  
Model Versus ◽  
String Networks ◽  
Gravitational Wave Background

scholarly journals The Stochastic Gravitational Wave Background Generated by Cosmic String Networks

2014 ◽  
Vol 10 (S306) ◽  
pp. 391-393
Author(s):  
L. Sousa ◽  
P. P. Avelino
Keyword(s):  
Gravitational Wave ◽  
Gravitational Waves ◽  
Recent Work ◽  
Cosmic String ◽  
Cosmological Evolution ◽  
Analytical Tools ◽  
String Networks ◽  
Gravitational Wave Background

AbstractCosmic string interactions often result in the formation of cosmic string loops that detach from the long string network and radiate their energy in the form of gravitational waves. Loop production occurs copiously throughout the cosmological evolution of a cosmic string network and the superimposition of their emissions gives rise to a stochastic gravitational In this essay, we briefly review our recent work on the stochastic gravitational wave background generated by cosmic string networks and introduce a set of numerical and analytical tools for the computation of this background.

scholarly journals Anisotropies in the gravitational wave background as a probe of the cosmic string network

2017 ◽  
Vol 95 (4) ◽  
Author(s):  
Sachiko Kuroyanagi ◽  
Keitaro Takahashi ◽  
Naoyuki Yonemaru ◽  
Hiroki Kumamoto
Keyword(s):  
Gravitational Wave ◽  
Cosmic String ◽  
Gravitational Wave Background

scholarly journals Testing Primordial Black Holes with multi-band observations of the stochastic gravitational wave background

2021 ◽  
Vol 2021 (12) ◽  
pp. 012
Author(s):  
Matteo Braglia ◽  
Juan García-Bellido ◽  
Sachiko Kuroyanagi
Keyword(s):  
Black Holes ◽  
Gravitational Wave ◽  
Particle Physics ◽  
State Parameter ◽  
Mass Function ◽  
Late Time ◽  
Primordial Black Holes ◽  
Scale Invariant ◽  
Wide Range ◽  
Gravitational Wave Background

Abstract The mass distribution of Primordial Black Holes (PBHs) is affected by drops in the pressure of the early Universe plasma. For example, events in the standard model of particle physics, such as the W ±/Z 0 decoupling, the quark-hadron transition, the muon and pion becoming non-relativistic, and the annihilation of electrons and positrons, cause a suppression in the Equation of State parameter and leave peaks in the PBH mass function around 10-6, 2, 60, and 106 M ☉, respectively, in the case of a nearly scale-invariant primordial power spectrum. The superposition of unresolved mergers of such PBHs results in a stochastic gravitational-wave background (SGWB) that covers a wide range of frequencies and can be tested with future gravitational wave (GW) detectors. In this paper, we discuss how its spectral shape can be used to infer properties about inflation, the thermal history of the Universe, and the dynamics of binary formation in dense halos encoded in their merger rate formula. Although many of these physical effects are degenerate within the sensitivity of a single detector, they can be disentangled by the simultaneous observation of the SGWB at different frequencies, highlighting the importance of multi-frequency observations of GWs to characterize the physics of PBHs from the early to the late time Universe.

scholarly journals Ability of LISA to detect a gravitational-wave background of cosmological origin: The cosmic string case

2022 ◽  
Vol 105 (2) ◽  
Author(s):  
Guillaume Boileau ◽  
Alexander C. Jenkins ◽  
Mairi Sakellariadou ◽  
Renate Meyer ◽  
Nelson Christensen
Keyword(s):  
Gravitational Wave ◽  
Cosmic String ◽  
Gravitational Wave Background
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