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
Quantum tunneling in the early universe: stable magnetic monopoles from metastable cosmic strings
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2024/05/128
Abstract: We present a novel mechanism for producing topologically stable monopoles (TSMs) from the quantum mechanical decay of metastable cosmic strings in the early universe. In an SO(10) model this mechanism yields TSMs that carry two… read more here.
Keywords: cosmic strings; magnetic charge; metastable strings; metastable cosmic ... See more keywords
Induced gravitational waves, metastable cosmic strings and primordial black holes in GUTs
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2025/01/106
Abstract: We explore the cosmological and astrophysical implications of a realistic hybrid inflation model based on flipped SU(5). The model contains superheavy metastable cosmic strings arising from a waterfall field that encounters a limited number of… read more here.
Keywords: cosmic strings; primordial black; gravitational waves; metastable cosmic ... See more keywords
Gravitational waves from metastable cosmic strings in supersymmetric new inflation model
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2025/04/010
Abstract: Recent observations by pulsar timing arrays (PTAs) indicate a potential detection of a stochastic gravitational wave (GW) background. Metastable cosmic strings have been recognized as a possible source of the observed signals. In this paper,… read more here.
Keywords: new inflation; cosmic strings; supersymmetric new; metastable cosmic ... See more keywords
Cosmic Strings-induced CMB anisotropies in light of Weighted Morphology
Sign Up to like & getrecommendations! Published in 2025 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staf1110
Abstract: Motivated by the morphological measures in assessing the geometrical and topological properties of a generic cosmological stochastic field, we propose an extension of the weighted morphological measures, specifically the nth conditional moments of derivative (cmd-n).… read more here.
Keywords: cosmic strings; strings induced; cmb anisotropies; induced cmb ... 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