Zobrazeno 1 - 10
of 98
pro vyhledávání: '"Handley, W J"'
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
We provide a complementary nested sampling analysis for the Atacama Cosmology Telescope lensing data release 6. This allows the quantification of global consistency statistics between ACT lensing and alternative datasets. In the context of flat $\Lam
Externí odkaz:
http://arxiv.org/abs/2310.08490
Autor:
Dineen, D. D., Handley, W. J.
Publikováno v:
Phys. Rev. D 109, 083513 (2024)
This work compares cosmological matching conditions used in approximating generic pre-inflationary phases of the universe. We show that the joining conditions for primordial scalar perturbations assumed by Contaldi et al. are inconsistent with the ph
Externí odkaz:
http://arxiv.org/abs/2309.15984
Autor:
Gessey-Jones, T., Handley, W. J.
Sensitivity forecasts inform the design of experiments and the direction of theoretical efforts. To arrive at representative results, Bayesian forecasts should marginalize their conclusions over uncertain parameters and noise realizations rather than
Externí odkaz:
http://arxiv.org/abs/2309.06942
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 526, Issue 3, December 2023, Pages 4262-4284
Cosmic rays generated by supernovae carry away a significant portion of the lifetime energy emission of their parent star, making them a plausible mechanism for heating the early universe intergalactic medium (IGM). Following a review of the existing
Externí odkaz:
http://arxiv.org/abs/2304.07201
Astrophysical Constraints from the SARAS3 non-detection of the Cosmic Dawn Sky-Averaged 21-cm Signal
Autor:
Bevins, H. T. J., Fialkov, A., Acedo, E. de Lera, Handley, W. J., Singh, S., Subrahmanyan, R., Barkana, R.
Observations of the redshifted 21-cm line of atomic hydrogen have resulted in several upper limits on the 21-cm power spectrum and a tentative detection of the sky-averaged signal at $z\sim17$. Made with the EDGES Low-Band antenna, this claim was rec
Externí odkaz:
http://arxiv.org/abs/2212.00464
Publikováno v:
Phys. Rev. D 108, 062006, Published 29 September 2023
Interfering signals such as Radio Frequency Interference from ubiquitous satellite constellations are becoming an endemic problem in fields involving physical observations of the electromagnetic spectrum. To address this we propose a novel data clean
Externí odkaz:
http://arxiv.org/abs/2211.15448
Autor:
Gessey-Jones, T., Sartorio, N. S., Fialkov, A., Mirouh, G. M., Magg, M., Izzard, R. G., Acedo, E. de Lera, Handley, W. J., Barkana, R.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 516, Issue 1, October 2022, Pages 841-860
Properties of the first generation of stars (Pop III), such as their initial mass function (IMF), are poorly constrained by observations and have yet to converge between simulations. The cosmological 21-cm signal of neutral hydrogen is predicted to b
Externí odkaz:
http://arxiv.org/abs/2202.02099
Autor:
Bevins, H. T. J., Acedo, E. de Lera, Fialkov, A., Handley, W. J., Singh, S., Subrahmanyan, R., Barkana, R.
We present a Bayesian re-analysis of the sky-averaged 21-cm experimental data from SARAS2 using nested sampling implemented with polychord, spectrally smooth foreground modelling implemented with maxsmooth, detailed systematic modelling and rapid sig
Externí odkaz:
http://arxiv.org/abs/2201.11531
Emulation of the Global (sky-averaged) 21-cm signal with neural networks has been shown to be an essential tool for physical signal modelling. In this paper we present globalemu, a Global 21-cm signal emulator that uses redshift as a character defini
Externí odkaz:
http://arxiv.org/abs/2104.04336