scholarly journals Effect of high harmonic loops on gravitational wave bounds from cosmic strings

2021 ◽  
Vol 104 (12) ◽  
Author(s):  
Despoina Pazouli ◽  
Konstantinos Palapanidis ◽  
Anastasios Avgoustidis ◽  
Edmund J. Copeland
Keyword(s):  
Gravitational Wave ◽  
Cosmic Strings ◽  
High Harmonic

scholarly journals Searching for gravitational-wave bursts from cosmic string cusps with the Parkes Pulsar Timing Array

2020 ◽  
Vol 501 (1) ◽  
pp. 701-712
Author(s):  
N Yonemaru ◽  
S Kuroyanagi ◽  
G Hobbs ◽  
K Takahashi ◽  
X-J Zhu ◽  
...  
Keyword(s):  
False Alarm ◽  
Gravitational Wave ◽  
Cosmic String ◽  
Cosmic Strings ◽  
False Alarm Probability ◽  
String Tension ◽  
Detection Algorithm ◽  
Pulsar Timing ◽  
Upper Limits ◽  
Pulsar Timing Array

ABSTRACT Cosmic strings are potential gravitational-wave (GW) sources that can be probed by pulsar timing arrays (PTAs). In this work we develop a detection algorithm for a GW burst from a cusp on a cosmic string, and apply it to Parkes PTA data. We find four events with a false alarm probability less than 1 per cent. However further investigation shows that all of these are likely to be spurious. As there are no convincing detections we place upper limits on the GW amplitude for different event durations. From these bounds we place limits on the cosmic string tension of Gμ ∼ 10−5, and highlight that this bound is independent from those obtained using other techniques. We discuss the physical implications of our results and the prospect of probing cosmic strings in the era of Square Kilometre Array.

scholarly journals New limits on cosmic strings from gravitational wave observation

2018 ◽  
Vol 778 ◽  
pp. 392-396 ◽  
Author(s):  
Jose J. Blanco-Pillado ◽  
Ken D. Olum ◽  
Xavier Siemens
Keyword(s):  
Gravitational Wave ◽  
Cosmic Strings ◽  
Wave Observation

scholarly journals The Gravitational Wave Symphony of Structure Formation: Overview

2015 ◽  
Vol 11 (A29B) ◽  
pp. 283-284
Author(s):  
T. Joseph W. Lazio ◽  
Sarah Burke-Spolaor
Keyword(s):  
Black Holes ◽  
Gravitational Wave ◽  
Structure Formation ◽  
Cosmic Strings ◽  
Supermassive Black Holes ◽  
The Universe

This Focus Meeting was designed to lie at the scientific intersection of structure formation and gravitational wave studies. In broad-strokes terms, binary supermassive black holes (BSMBHs) and cosmic strings may both play a central role in shaping the Universe as we know it.

scholarly journals Improved calculation of the gravitational wave spectrum from kinks on infinite cosmic strings

2016 ◽  
Vol 2016 (11) ◽  
pp. 005-005 ◽  
Author(s):  
Yuka Matsui ◽  
Koichiro Horiguchi ◽  
Daisuke Nitta ◽  
Sachiko Kuroyanagi
Keyword(s):  
Gravitational Wave ◽  
Cosmic Strings ◽  
Wave Spectrum

scholarly journals Gravitational wave spectrum from kinks on infinite cosmic strings with Y-junctions

2020 ◽  
Vol 2020 (11) ◽  
pp. 039-039
Author(s):  
Yuka Matsui ◽  
Koichiro Horiguchi ◽  
Daisuke Nitta ◽  
Sachiko Kuroyanagi
Keyword(s):  
Gravitational Wave ◽  
Cosmic Strings ◽  
Wave Spectrum

scholarly journals Confronting SO(10) GUTs with proton decay and gravitational waves

2021 ◽  
Vol 2021 (10) ◽  
Author(s):  
Stephen F. King ◽  
Silvia Pascoli ◽  
Ye-Ling Zhou ◽  
Jessica Turner
Keyword(s):  
Gravitational Wave ◽  
Gravitational Waves ◽  
Cosmic String ◽  
Cosmic Strings ◽  
Proton Decay ◽  
Null Results ◽  
Grand Unified Theories ◽  
Unified Theories ◽  
Proton Lifetime ◽  
Gut Scale

Abstract Grand Unified Theories (GUT) predict proton decay as well as the formation of cosmic strings which can generate gravitational waves. We determine which non-supersymmetric SO(10) breaking chains provide gauge unification in addition to a gravitational signal from cosmic strings. We calculate the GUT and intermediate scales for these SO(10) breaking chains by solving the renormalisation group equations at the two-loop level. This analysis predicts the GUT scale, hence the proton lifetime, in addition to the scale of cosmic string generation and thus the associated gravitational wave signal. We determine which SO(10) breaking chains survive in the event of the null results of the next generation of gravitational waves and proton decay searches and determine the correlations between proton decay and gravitational waves scales if these observables are measured.

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