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astro-ph.CO2026
Exploring the High-Redshift 21-cm Signal via Self-Consistent Simulations using Artificial Neural Network Emulation
Colton R. Feathers, Eli Visbal, Steven Murray +2
We present a novel, self-consistent, semi-numeric Cosmic Dawn (CD) simulation in which small-scale star formation (SF) is calibrated to the \emph{AEOS} and \emph{Renaissance} hydro…
astro-ph.CO2026
Primordial black holes and the velocity acoustic oscillations features in 21 cm signals from the cosmic Dark Ages
Zhihe Zhang, Bin Yue, Yidong Xu +2
Astrophysical luminous objects such as the first stars have not yet formed in the Dark Ages. However, primordial black holes (PBHs) always exist throughout cosmic history since the…
astro-ph.CO2025
An independent estimate of H(z) at z = 0.5 from the stellar ages of brightest cluster galaxies
S. Ilani Loubser, Adebusola B. Alabi, Matt Hilton +6
Several cosmological observations (e.g., Cosmic Microwave Background (CMB), Supernovae Type Ia, and local distance ladder measurements such as Cepheids) have been used to measure t…