Zobrazeno 1 - 10
of 5 941
pro vyhledávání: '"A. Fialkov"'
Several ongoing and upcoming radio telescopes aim to detect either the global 21-cm signal or the 21-cm power spectrum. The extragalactic radio background, as detected by ARCADE-2 and LWA-1, suggests a strong radio background from cosmic dawn, which
Externí odkaz:
http://arxiv.org/abs/2410.04792
Autor:
Dome, Tibor, May, Simon, Laguë, Alex, Marsh, David J. E., Johnston, Sarah, Bose, Sownak, Tocher, Alex, Fialkov, Anastasia
We study the implications of relaxing the requirement for ultralight axions to account for all dark matter in the Universe by examining mixed dark matter (MDM) cosmologies with axion fractions $f \leq 0.3$ within the fuzzy dark matter (FDM) window $1
Externí odkaz:
http://arxiv.org/abs/2409.11469
Autor:
Liu, Boyuan, Hartwig, Tilman, Sartorio, Nina S., Dvorkin, Irina, Costa, Guglielmo, Santoliquido, Filippo, Fialkov, Anastasia, Klessen, Ralf S., Bromm, Volker
The gravitational wave (GW) signal from binary black hole (BBH) mergers is a promising probe of Population III (Pop III) stars. To fully unleash the power of the GW probe, one important step is to understand the relative importance and features of di
Externí odkaz:
http://arxiv.org/abs/2406.17397
Autor:
O'Hara, Oscar Sage David, Dulwich, Fred, Acedo, Eloy de Lera, Dhandha, Jiten, Gessey-Jones, Thomas, Anstey, Dominic, Fialkov, Anastasia
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 533, Issue 3, September 2024, Pages 2876-2892
The Cosmic Dawn was marked by the formation of the first stars, and preceded the Epoch of Reionization (EoR), when the Universe underwent a fundamental transformation caused by the radiation from these first stars and galaxies. Interferometric 21-cm
Externí odkaz:
http://arxiv.org/abs/2402.04008
The efficiency of radio emission is an important unknown parameter of early galaxies at cosmic dawn, as models with high efficiency have been shown to modify the cosmological 21-cm signal substantially, deepening the absorption trough and boosting th
Externí odkaz:
http://arxiv.org/abs/2401.05865
Autor:
Gessey-Jones, T., Pochinda, S., Bevins, H. T. J., Fialkov, A., Handley, W. J., Acedo, E. de Lera, Singh, S., Barkana, R.
Constraints on the potential properties of superconducting cosmic strings provide an indirect probe of physics beyond the standard model at energies inaccessible to terrestrial particle colliders. In this study, we perform the first joint Bayesian an
Externí odkaz:
http://arxiv.org/abs/2312.08828
Autor:
Pochinda, S., Gessey-Jones, T., Bevins, H. T. J., Fialkov, A., Heimersheim, S., Abril-Cabezas, I., Acedo, E. de Lera, Singh, S., Sikder, S., Barkana, R.
The early Universe, spanning 400,000 to 400 million years after the Big Bang ($z\approx1100-11$), has been left largely unexplored as the light from luminous objects is too faint to be observed directly. While new experiments are pushing the redshift
Externí odkaz:
http://arxiv.org/abs/2312.08095
Global 21-cm experiments are built to study the evolution of the Universe between the cosmic dawn and the epoch of reionisation. FlexKnot is a function parameterised by freely moving knots stringed together by splines. Adopting the FlexKnot function
Externí odkaz:
http://arxiv.org/abs/2311.14537
The hydrogen 21-cm signal is predicted to be the richest probe of the young Universe including eras known as the cosmic Dark Ages, the Cosmic Dawn when the first star and black hole formed, and the Epoch of Reionization. This signal holds the key to
Externí odkaz:
http://arxiv.org/abs/2311.05366
Autor:
Munshi, S., Mertens, F. G., Koopmans, L. V. E., Offringa, A. R., Semelin, B., Aubert, D., Barkana, R., Bracco, A., Brackenhoff, S. A., Cecconi, B., Ceccotti, E., Corbel, S., Fialkov, A., Gehlot, B. K., Ghara, R., Girard, J. N., Grießmeier, J. M., Höfer, C., Hothi, I., Mériot, R., Mevius, M., Ocvirk, P., Shaw, A. K., Theureau, G., Yatawatta, S., Zarka, P., Zaroubi, S.
Publikováno v:
A&A 681, A62 (2024)
The redshifted 21 cm signal from neutral hydrogen is a direct probe of the physics of the early universe and has been an important science driver of many present and upcoming radio interferometers. In this study we use a single night of observations
Externí odkaz:
http://arxiv.org/abs/2311.05364