Zobrazeno 1 - 10
of 641
pro vyhledávání: '"Handley W"'
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:
Acedo, E. de Lera, de Villiers, D. I. L., Razavi-Ghods, N., Handley, W., Fialkov, A., Magro, A., Anstey, D., Bevins, H. T. J., Chiello, R., Cumner, J., Josaitis, A. T., Roque, I. L. V., Sims, P. H., Scheutwinkel, K. H., Alexander, P., Bernardi, G., Carey, S., Cavillot, J., Croukamp, W., Ely, J. A., Gessey-Jones, T., Gueuning, Q., Hills, R., Kulkarni, G., Maiolino, R., Meerburg, P. D., Mittal, S., Pritchard, J. R., Puchwein, E., Saxena, A., Shen, E., Smirnov, O., Spinelli, M., Zarb-Adami, K.
Publikováno v:
Nature Astronomy 6, p 984 998, 2022
Observations of the 21-cm line from primordial hydrogen promise to be one of the best tools to study the early epochs of the Universe: the Dark Ages, the Cosmic Dawn, and the subsequent Epoch of Reionization. In 2018, the EDGES experiment caught the
Externí odkaz:
http://arxiv.org/abs/2210.07409
We demonstrate that the Bayesian evidence can be used to find a good approximation of the ground truth likelihood function of a dataset, a goal of the likelihood-free inference (LFI) paradigm. As a concrete example, we use forward modelled sky-averag
Externí odkaz:
http://arxiv.org/abs/2204.04491
We demonstrate the effectiveness of a Bayesian evidence-based analysis for diagnosing and disentangling the sky-averaged 21-cm signal from instrumental systematic effects. As a case study, we consider a simulated REACH pipeline with an injected syste
Externí odkaz:
http://arxiv.org/abs/2204.04445