Zobrazeno 1 - 10
of 129 863
pro vyhledávání: '"21 cm"'
Dark matter is believed to account for a significant portion of the mass in the universe, exerting a critical influence on the formation and evolution of cosmic structures. This research delves into the processes of annihilation and decay of dark mat
Externí odkaz:
http://arxiv.org/abs/2412.19257
Machine learning (ML) methods have become popular for parameter inference in cosmology, although their reliance on specific training data can cause difficulties when applied across different data sets. By reproducing and testing networks previously u
Externí odkaz:
http://arxiv.org/abs/2412.15893
The 21 cm signal from the Epoch of Reionization will be observed with the up-coming Square Kilometer Array (SKA). SKA should yield a full tomography of the signal which opens the possibility to explore its non-Gaussian properties. How can we extract
Externí odkaz:
http://arxiv.org/abs/2411.14419
Green Peas (GPs) and blueberry galaxies (BBs) are thought to be local analogs ($z<$0.1) of high redshift Ly$\alpha$ emitters. H I study of these can help us understand the star formation in the primordial Universe. In this Letter, we present the resu
Externí odkaz:
http://arxiv.org/abs/2411.13527
Autor:
Phelps, Jack
This study presents the methodology for creating a cost-efficient radio astronomy telescope that can be used to detect 21 cm emissions (1420.405 MHz) and determine the distribution and kinematics of neutral hydrogen specifically in the Milky Way. By
Externí odkaz:
http://arxiv.org/abs/2411.00057
The timeline of cosmic reionization remains uncertain despite sustained efforts to study how the ionizing output of early galaxies shaped the intergalactic medium (IGM). Using the semi-numerical code LIMFAST, we investigate the prospects for timing t
Externí odkaz:
http://arxiv.org/abs/2410.21410
Neural network (NN) emulators of the global 21 cm signal need emulation error much less than the observational noise in order to be used to perform unbiased Bayesian parameter inference. To this end, we introduce $\texttt{21cmLSTM}$ -- a long short-t
Externí odkaz:
http://arxiv.org/abs/2410.07619
Publikováno v:
MNRAS, 2024, Volume 536, Issue 2, pp. 1645-1659
The tumultuous effects of ultraviolet photons that source cosmic reionization, the subsequent compression and shock-heating of low-density regions, and the modulation of baryons in shallow potential wells induced by the passage of ionization fronts,
Externí odkaz:
http://arxiv.org/abs/2409.11613
Autor:
Pattison, Joe H. N., Cavillot, Jean, Bevins, Harry T. J., Anstey, Dominic J., Acedo, Eloy de Lera
The redshifted 21 cm line of cosmic atomic hydrogen is one of the most auspicious tools in deciphering the early Universe. Recovering this signal remains an ongoing problem for cosmologists in the field, with the signal being hidden behind foreground
Externí odkaz:
http://arxiv.org/abs/2408.06012
Autor:
Maity, Barun
Publikováno v:
A&A 689, A340 (2024)
The Epoch of Reionization (EoR) is a crucial link to grasp the complete evolutionary history of the universe. Several attempts with a variety of observables have been utilized in the past to understand the thermal and ionization evolution of the Inte
Externí odkaz:
http://arxiv.org/abs/2408.05722