Zobrazeno 1 - 10
of 406
pro vyhledávání: '"Meerburg P"'
This paper explores a novel application of spherical convolutional neural networks (CNNs) to detect primordial non-Gaussianity in the cosmic microwave background (CMB), a key probe of inflationary dynamics. While effective, traditional estimators enc
Externí odkaz:
http://arxiv.org/abs/2412.12377
The 21-cm brightness-temperature field of neutral hydrogen during the Epoch of Reionization and Cosmic Dawn is a rich source of cosmological and astrophysical information, primarily due to its significant non-Gaussian features. However, the complex,
Externí odkaz:
http://arxiv.org/abs/2409.06769
The redshifted 21-cm signal from the Cosmic Dawn and Epoch of Reionization carries invaluable information about the cosmology and astrophysics of the early Universe. Analyzing the data from a sky-averaged 21-cm signal experiment typically involves na
Externí odkaz:
http://arxiv.org/abs/2403.14618
Inspired by the discussion in the community on possible hidden systematic errors in late universe cosmological probes and non-trivial physical models developed to reduce the Hubble tension, we investigate the Pantheon and Pantheon+ SNe samples for po
Externí odkaz:
http://arxiv.org/abs/2308.05157
The 21-cm brightness temperature fluctuation from the Dark Ages ($z \simeq 30-100$) will allow us to probe the inflationary epoch on very small scales ($>0.1 \, \mbox{Mpc}^{-1}$), inaccessible to cosmic microwave background experiments. Combined with
Externí odkaz:
http://arxiv.org/abs/2307.15046
Autor:
Razavi-Ghods, Nima, Roque, Ian L. V., Carey, Steven H., Ely, John A., Handley, Will, Magro, Alessio, Chiello, Riccardo, Huang, Tian, Alexander, P., Anstey, D., Bernardi, G., Bevins, H. T. J., Cavillot, J., Croukamp, W., Cumner, J., Acedo, E. de Lera, de Villiers, D. I. L., Fialkov, A., Gessey-Jones, T., Gueuning, Q., Josaitis, A. T., Kulkarni, G., Leeney, S. A. K., Maiolino, R., Meerburg, P. D., Mittal, S., Pagano, M., Pegwal, S., Pieterse, C., Pritchard, J. R., Saxena, A., Scheutwinkel, K. H., Scott, P., Shen, E., Sims, P. H., Smirnov, O., Spinelli, M., Zarb-Adami, K.
We detail the the REACH radiometric system designed to enable measurements of the 21-cm neutral hydrogen line. Included is the radiometer architecture and end-to-end system simulations as well as a discussion of the challenges intrinsic to highly-cal
Externí odkaz:
http://arxiv.org/abs/2307.00099
Autor:
Flöss, Thomas, Meerburg, P. Daniel
We study the use of U-Nets in reconstructing the linear dark matter density field and its consequences for constraining cosmological parameters, in particular primordial non-Gaussianity. Our network is able to reconstruct the initial conditions of re
Externí odkaz:
http://arxiv.org/abs/2305.07018
Autor:
Saxena, Anchal, Cole, Alex, Gazagnes, Simon, Meerburg, P. Daniel, Weniger, Christoph, Witte, Samuel J.
Publikováno v:
MNRAS 525 (2023) 6097-6111
Cosmic Dawn (CD) and Epoch of Reionization (EoR) are epochs of the Universe which host invaluable information about the cosmology and astrophysics of X-ray heating and hydrogen reionization. Radio interferometric observations of the 21-cm line at hig
Externí odkaz:
http://arxiv.org/abs/2303.07339
Autor:
Zegeye, David, Bianchini, Federico, Bond, J. Richard, Chluba, Jens, Crawford, Thomas, Fabbian, Giulio, Gluscevic, Vera, Grin, Daniel, Hill, J. Colin, Meerburg, P. Daniel, Orlando, Giorgio, Partridge, Bruce, Reichardt, Christian L., Remazeilles, Mathieu, Scott, Douglas, Wollack, Edward J., Collaboration, The CMB-S4
Diffusion damping of the cosmic microwave background (CMB) power spectrum results from imperfect photon-baryon coupling in the pre-recombination plasma. At redshift $5 \times 10^4 < z < 2 \times 10^6$, the plasma acquires an effective chemical potent
Externí odkaz:
http://arxiv.org/abs/2303.00916
Autor:
Saxena, Anchal, Meerburg, P. Daniel, Acedo, Eloy de Lera, Handley, Will, Koopmans, Léon V. E.
In a sky-averaged 21-cm signal experiment, the uncertainty on the extracted signal depends mainly on the covariance between the foreground and 21-cm signal models. In this paper, we construct these models using the modes of variation obtained from th
Externí odkaz:
http://arxiv.org/abs/2212.07415