Galactic ionizing photon budget during the epoch of reionization in the Cosmic Dawn II simulation
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DOI: 10.1093/mnras/staa1748
Abstract: Cosmic Dawn II yields the first statistically meaningful determination of the relative contribution to reionization by galaxies of different halo mass, from a fully coupled radiation-hydrodynamics simulation of the epoch of reionization large enough (∼100 Mpc)… read more here.
Keywords: epoch reionization; reionization; per cent; mass ... See more keywords
Studying the Multi-frequency Angular Power Spectrum of the Cosmic Dawn 21-cm Signal
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DOI: 10.1093/mnras/stad1114
Abstract: The light-cone (LC) anisotropy arises due to cosmic evolution of the cosmic dawn 21-cm signal along the line-of-sight (LoS) axis of the observation volume. The LC effect makes the signal statistically non-ergodic along the LoS… read more here.
Keywords: power spectrum; frequency; cosmic dawn; signal ... See more keywords
Inferring the astrophysics of reionization and cosmic dawn from galaxy luminosity functions and the 21-cm signal
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DOI: 10.1093/mnras/stz032
Abstract: The properties of the first galaxies, expected to drive the Cosmic Dawn (CD) and the Epoch of Reionization (EoR), are encoded in the 3D structure of the cosmic 21-cm signal. Parameter inference from upcoming 21-cm… read more here.
Keywords: galaxy; reionization; luminosity; astrophysics ... See more keywords
Ionization from cosmic strings at cosmic dawn
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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
Bounds on ultralight hidden-photon dark matter from observation of the 21 cm signal at cosmic dawn
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DOI: 10.1103/physrevd.99.123511
Abstract: Ultra-light hidden-photon dark matter produces an oscillating electric field in the early Universe plasma, which in turn induces an electric current in its ionized component whose dissipation results in heat transfer from the dark matter… read more here.
Keywords: hidden photon; dark matter; dark; cosmic dawn ... See more keywords