Constraints on Superconducting Cosmic Strings from the Global $21$-cm Signal before Reionization

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 before the epoch of reionization. We study the constraints on the parameter space of superconducting strings which can be derived by demanding that the absorption feature is not larger in amplitude than what has recently been reported by the EDGES collaboration.

arXiv comment8 pages, 1 figure, comments welcome

References in corpus (37)

• Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
• Cosmic strings
• An absorption profile centred at 78 megahertz in the sky-averaged spectrum
• The number of cosmic string loops
• ARCADE 2 Measurement of the Extra-Galactic Sky Temperature at 3-90 GHz
• The NANOGrav Nine-year Data Set: Limits on the Isotropic Stochastic Gravitational Wave Background
• Cosmological evolution of cosmic string loops
• Large parallel cosmic string simulations: New results on loop production
• Enhanced global signal of neutral hydrogen due to excess radiation at cosmic dawn
• Signs of Dark Matter at 21-cm?
• Modeling the Radio Background from the First Black Holes at Cosmic Dawn: Implications for the 21 cm Absorption Amplitude
• Topological Defects and Structure Formation
• Scaling of cosmic string loops
• Constraining Baryon--Dark Matter Scattering with the Cosmic Dawn 21-cm Signal
• The EDGES 21 cm Anomaly and Properties of Dark Matter
• Evolution of cosmic string configurations
• Cosmic string loop distribution on all length scales and at any redshift
• Gamma ray bursts from superconducting cosmic strings
• Cosmic Sparks from Superconducting Strings
• COBE vs Cosmic Strings: An Analytical Model
• Results from EDGES High-Band: II. Constraints on Parameters of Early Galaxies
• Implications of fast radio bursts for superconducting cosmic strings
• Radio Broadcasts from Superconducting Strings
• Searching for Cosmic Strings in New Observational Windows
• Cosmic String Loops as the Seeds of Super-Massive Black Holes
• CMB Distortions from Superconducting Cosmic Strings
• High Redshift Gamma-Ray Bursts: Observational Signatures of Superconducting Cosmic Strings?
• Radio bursts from superconducting strings
• Electromagnetic radiation from superconducting string cusps
• UHE neutrinos from superconducting cosmic strings
• Superconducting cosmic strings as sources of cosmological fast radio bursts
• Cosmological and astrophysical constraints on superconducting cosmic strings
• Constraints on Superconducting Cosmic Strings from Early Reionization
• The Wouthuysen Field Absorption Trough in Cosmic Strings Wakes
• On the Possible Enhancement of the Global $21$-cm Signal at Reionization from the Decay of Cosmic String Cusps
• Cosmic Strings and the Origin of Globular Clusters
• Effects of Cosmic String Velocities and the Origin of Globular Clusters

Cited by in corpus (24)

• Improved Constraints on the 21 cm EoR Power Spectrum and the X-Ray Heating of the IGM with HERA Phase I Observations
• HERA Phase I Limits on the Cosmic 21-cm Signal: Constraints on Astrophysics and Cosmology During the Epoch of Reionization
• The REACH radiometer for detecting the 21-cm hydrogen signal from redshift 7.5 to 28
• High-redshift radio galaxies: a potential new source of 21-cm fluctuations
• The role of soft photon injection and heating in 21 cm cosmology
• Background of radio photons from primordial black holes
• Intermediate Mass Black Hole Seeds from Cosmic String Loops
• Gravitational Waves from Current-Carrying Cosmic Strings
• Massive black holes at high redshifts from superconducting cosmic strings
• Constraining spinning primordial black holes with global 21-cm signal
• Constraint on Primordial Magnetic Fields In the Light of ARCADE 2 and EDGES Observations
• Exploiting synergies between JWST and cosmic 21-cm observations to uncover star formation in the early Universe
• Can accreting primordial black holes explain the excess radio background?
• Extracting the Signal of Cosmic String Wakes from 21-cm Observations
• IR/UV mixing from local similarity maps of scalar non-Hermitian field theories
• A closer look at dark photon explanations of the excess radio background
• Relic neutrino decay solution to the excess radio background
• Ionization from Cosmic Strings at Cosmic Dawn
• Global 21cm Absorption Signal from Superconducting Cosmic Strings
• Narrowing the discovery space of the cosmological 21-cm signal using multi-wavelength constraints
• Cosmic Strings-induced CMB anisotropies in light of Weighted Morphology
• Cosmic Rays and Spectral Distortions from Collapsing Textures
• Gravitational Wave Mountains: current-carrying domain walls
• Optimizing Foreground Modelling for Global 21cm Cosmology with GPU-Accelerated Nested Sampling