Constraints on superconducting cosmic strings from the global 21-cm signal before reionization
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/09/009
Abstract: Electromagnetic radiation from the cusp region of superconducting cosmic strings leads to a radio excess in the photon spectrum in the early universe and can produce a deep absorption feature in the global 21cm signal… read more here.
Keywords: global signal; reionization; superconducting cosmic; cosmic strings ... See more keywords
Sneutrino tribrid inflation, metastable cosmic strings and gravitational waves
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/11/022
Abstract: We present a successful realization of sneutrino tribrid inflation model based on a gauged U(1)_B-L extension of Minimal Supersymmetric Standard Model (MSSM). A single interaction term involving the B-L Higgs field and the right-handed neutrinos… read more here.
Keywords: tribrid inflation; metastable cosmic; right handed; sneutrino tribrid ... See more keywords
Gravitational waves from current-carrying cosmic strings
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2023/04/009
Abstract: Cosmic strings are predicted by many Standard Model extensions involving the cosmological breaking of a symmetry with nontrivial first homotopy group and represent a potential source of primordial gravitational waves (GWs). Present efforts to model… read more here.
Keywords: cosmic strings; current carrying; physics; gravitational waves ... See more keywords
Parametric resonances in axionic cosmic strings
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2023/04/043
Abstract: In this letter we uncover a new parametric resonance of axionic cosmic strings. This process is triggered by the presence on the string of internal mode excitations that resonantly amplify the amplitude of transverse displacements… read more here.
Keywords: cosmic strings; resonances axionic; axionic cosmic; cosmology ... See more keywords
Ionization from cosmic strings at cosmic dawn
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.101.023528
Abstract: Cosmic strings produce charged particles which, by emitting electromagnetic radiation, partially ionize neutral hydrogen during the dark ages. Corrections to the ionization fraction of neutral hydrogen induced by cosmic strings could lead to new observational… read more here.
Keywords: ionization cosmic; cosmic strings; ionization; cosmic dawn ... See more keywords
Effect of high harmonic loops on gravitational wave bounds from cosmic strings
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review D"
DOI: 10.1103/physrevd.104.123505
Abstract: Based on a binary tree model for the self intersection of cosmic string loops containing high harmonics we estimate the number of self-intersections of the parent and daughter loops and the associated cusp production to… read more here.
Keywords: harmonic loops; gravitational wave; effect high; cosmic strings ... See more keywords
Cosmic strings in generalized hybrid metric-Palatini gravity
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review D"
DOI: 10.1103/physrevd.104.124056
Abstract: Tiberiu Harko ID†Department of Theoretical Physics, National Institute of Physics and Nuclear Engineering (IFIN-HH), Bucharest, 077125 Romania, Astronomical Observatory, 19 Ciresilor Street, 400487 Cluj-Napoca, Romania, Department of Physics, Babes-Bolyai University, Kogalniceanu Street, Cluj-Napoca 400084,… read more here.
Keywords: physics; generalized hybrid; metric palatini; hybrid metric ... See more keywords
Anisotropies in the gravitational wave background as a probe of the cosmic string network
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review D"
DOI: 10.1103/physrevd.95.043531
Abstract: Pulsar timing arrays are one of the powerful tools to test the existence of cosmic strings through searching for the gravitational wave background. The amplitude of the background connects to information on cosmic strings such… read more here.
Keywords: anisotropies gravitational; gravitational wave; string network; cosmic strings ... See more keywords
Cosmic strings and other topological defects in nonscaling regimes
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review D"
DOI: 10.1103/physrevd.95.043537
Abstract: Cosmic strings are topological defects possibly formed in the early Universe, which may be observable due to their gravitational effects on the cosmic microwave background radiation or gravitational wave experiments. To this effect it is… read more here.
Keywords: topological defects; network; matter; cosmic strings ... See more keywords
Massless cosmic strings in an expanding universe
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review D"
DOI: 10.1103/physrevd.98.123531
Abstract: Circular massless cosmic strings which move with the speed of light in the de Sitter universe are described. Construction of the background geometry is based on parabolic isometries of the de Sitter spacetime. Microscopic circular… read more here.
Keywords: geometry; cosmic strings; expanding universe; massless cosmic ... See more keywords