Search Results - "De Lera Acedo, Eloy"

A Bayesian method to mitigate the effects of unmodelled time-varying systematics for 21-cm cosmology experiments by Kirkham, Christian J, Anstey, Dominic J, de Lera Acedo, Eloy

“…ABSTRACT Radio observations of the neutral hydrogen signal from the Cosmic Dawn and Epoch of Reionization have helped to provide constraints on the properties…”
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Investigating the upper bound of high-frequency electromagnetic waves on unshielded twisted copper pairs by Dinc, Ergin, Bukhari, Syed Sheheryar, Rawi, Anas Al, de Lera Acedo, Eloy

“…This paper explores the behaviour of the ubiquitous twisted pairs at high frequencies and wideband excitation of twisted pairs up to 12 GHz. Higher carrier…”
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A general Bayesian framework for foreground modelling and chromaticity correction for global 21 cm experiments by Anstey, Dominic, de Lera Acedo, Eloy, Handley, Will

“…ABSTRACT The H i 21 cm absorption line is masked by bright foregrounds and systematic distortions that arise due to the chromaticity of the antenna used to…”
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Use of time dependent data in Bayesian global 21-cm foreground and signal modelling by Anstey, Dominic, de Lera Acedo, Eloy, Handley, Will

“…ABSTRACT Global 21-cm cosmology aims to investigate the cosmic dawn and epoch of reionization by measuring the sky averaged H i absorption signal, which…”
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Informing antenna design for sky-averaged 21-cm experiments using a simulated Bayesian data analysis pipeline by Anstey, Dominic, Cumner, John, de Lera Acedo, Eloy, Handley, Will

“…ABSTRACT Global 21-cm experiments aim to measure the sky-averaged H i absorption signal from cosmic dawn and the epoch of reionization. However, antenna…”
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Quantifying ionospheric effects on global 21-cm observations by Shen, Emma, Anstey, Dominic, de Lera Acedo, Eloy, Fialkov, Anastasia, Handley, Will

“…ABSTRACT We modelled the two major layer of Earth’s ionosphere, the F-layer and the D-layer, by a simplified spatial model with temporal variance to study the…”
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Impact of extragalactic point sources on the low-frequency sky spectrum and cosmic dawn global 21-cm measurements by Mittal, Shikhar, Kulkarni, Girish, Anstey, Dominic, de Lera Acedo, Eloy

“…ABSTRACT The contribution of resolved and unresolved extragalactic point sources to the low-frequency sky spectrum is a potentially non-negligible part of the…”
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FlexKnot as a generalized model of the sky-averaged 21-cm signal at z ∼ 6–30 in the presence of systematics by Shen, Emma, Anstey, Dominic, de Lera Acedo, Eloy, Fialkov, Anastasia

“…Global 21-cm experiments are built to study the evolution of the Universe between the cosmic dawn and the epoch of reionization. FlexKnot is a function…”
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Bayesian data analysis for sky-averaged 21-cm experiments in the presence of ionospheric effects by Shen, Emma, Anstey, Dominic, de Lera Acedo, Eloy, Fialkov, Anastasia

“…ABSTRACT The ionosphere introduces chromatic distortions on low frequency radio waves, and thus poses a hurdle for 21-cm cosmology. In this paper, we introduce…”
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A general Bayesian framework to account for foreground map errors in global 21-cm experiments by Pagano, Michael, Sims, Peter, Liu, Adrian, Anstey, Dominic, Handley, Will, de Lera Acedo, Eloy

“…ABSTRACT Measurement of the global 21-cm signal during Cosmic Dawn and the Epoch of Reionization is made difficult by bright foreground emission which is 2–5…”
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An Inhomogeneous Plane-Wave Based Single-Level Fast Direct Solver for the Scattering Analysis of Extremely Large Antenna Arrays by Gueuning, Quentin, de Lera Acedo, Eloy, Brown, Anthony Keith, Craeye, Christophe

“…A semianalytic single-level fast direct solver (FDS) is presented for the method-of-moments (MoM) analysis of large planar antenna arrays with up to few…”
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Design of the New Wideband Vivaldi Feed for the HERA Radio-Telescope Phase II by Fagnoni, Nicolas, de Lera Acedo, Eloy, Drought, Nick, DeBoer, David R., Riley, Daniel, Razavi-Ghods, Nima, Carey, Steven, Parsons, Aaron R.

“…This article presents the design of a new dual-polarized Vivaldi feed for the Hydrogen Epoch of Reionization Array (HERA) radio telescope. This wideband feed…”
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Joint analysis constraints on the physics of the first galaxies with low-frequency radio astronomy data by Bevins, Harry T J, Heimersheim, Stefan, Abril-Cabezas, Irene, Fialkov, Anastasia, de Lera Acedo, Eloy, Handley, William, Singh, Saurabh, Barkana, Rennan

“…ABSTRACT The first billion years of cosmic history remains largely unobserved. We demonstrate, using a novel machine learning technique, how combining upper…”
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Understanding spectral artefacts in SKA-Low 21-cm cosmology experiments: the impact of cable reflections by O’Hara, Oscar S D, Dulwich, Fred, de Lera Acedo, Eloy, Dhandha, Jiten, Gessey-Jones, Thomas, Anstey, Dominic, Fialkov, Anastasia

“…ABSTRACT The Cosmic Dawn was marked by the formation of the first stars, and preceded the Epoch of Reionization (EoR), when the Universe underwent a…”
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Sky-averaged 21-cm signal extraction using multiple antennas with an SVD framework: the REACH case by Saxena, Anchal, Meerburg, P Daniel, de Lera Acedo, Eloy, Handley, Will, Koopmans, Léon V E

“…ABSTRACT In a sky-averaged 21-cm signal experiment, the uncertainty of the extracted signal depends mainly on the covariance between the foreground and 21-cm…”
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Efficient Simulation of Large Irregular Arrays on a Finite Ground Plane by Cavillot, Jean, Tihon, Denis, Mesa, Francisco, De Lera Acedo, Eloy, Craeye, Christophe

“…An efficient method is presented to take into account the radiation pattern deformation due to the presence of a finite ground plane lying under an antenna…”
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Mitigating Internal Instrument Coupling for 21 cm Cosmology. II. A Method Demonstration with the Hydrogen Epoch of Reionization Array by Kern, Nicholas S., Parsons, Aaron R., Dillon, Joshua S., Lanman, Adam E., Liu, Adrian, Bull, Philip, Ewall-Wice, Aaron, Abdurashidova, Zara, Aguirre, James E., Alexander, Paul, Ali, Zaki S., Balfour, Yanga, Beardsley, Adam P., Bernardi, Gianni, Bowman, Judd D., Bradley, Richard F., Burba, Jacob, Carilli, Chris L., Cheng, Carina, DeBoer, David R., Dexter, Matt, de Lera Acedo, Eloy, Fagnoni, Nicolas, Fritz, Randall, Furlanetto, Steve R., Glendenning, Brian, Gorthi, Deepthi, Greig, Bradley, Grobbelaar, Jasper, Halday, Ziyaad, Hazelton, Bryna J., Hewitt, Jacqueline N., Hickish, Jack, Jacobs, Daniel C., Julius, Austin, Kerrigan, Joshua, Kittiwisit, Piyanat, Kohn, Saul A., Kolopanis, Matthew, La Plante, Paul, Lekalake, Telalo, MacMahon, David, Malan, Lourence, Malgas, Cresshim, Maree, Matthys, Martinot, Zachary E., Matsetela, Eunice, Mesinger, Andrei, Molewa, Mathakane, Morales, Miguel F., Mosiane, Tshegofalang, Murray, Steven G., Neben, Abraham R., Patra, Nipanjana, Pieterse, Samantha, Pober, Jonathan C., Razavi-Ghods, Nima, Ringuette, Jon, Robnett, James, Rosie, Kathryn, Sims, Peter, Smith, Craig, Syce, Angelo, Thyagarajan, Nithyanandan, Williams, Peter K. G., Zheng, Haoxuan

“…We present a study of internal reflection and cross-coupling systematics in Phase I of the Hydrogen Epoch of Reionization Array (HERA). In a companion paper,…”
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Quantifying EoR delay spectrum contamination from diffuse radio emission by Lanman, Adam E, Pober, Jonathan C, Kern, Nicholas S, de Lera Acedo, Eloy, DeBoer, David R, Fagnoni, Nicolas

“…ABSTRACT The 21 cm hyperfine transition of neutral hydrogen offers a promising probe of the large-scale structure of the universe before and during the Epoch…”
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Experimental Demonstration of Multigigabit Data Communication Using Surface Waves on Twisted-Pair Cables by Toledano, Ilana, Bukhari, Syed Sheheryar, Aziz, Ahmed, Dinc, Ergin, Schaich, Tobias, Molnar, Daniel, Rawi, Anas Al, de Lera Acedo, Eloy, Crisp, Michael, Penty, Richard

“…The demand for higher broadband speeds is ever increasing whereas the deployment of full fibre to the premises is slower than initially predicted and remains…”
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Advanced Modeling of Surface Waves on Twisted Pair Cables: Surface Wave Stopbands by Schaich, Tobias, Dinc, Ergin, Molnar, Daniel, Drolia, Mayank, Bukhari, Syed, Aziz, Ahmed, Toledano, Ilana, Morsman, Trevor, Burton, Fraser, Crisp, Michael, de Lera Acedo, Eloy, Rawi, Anas Al, Penty, Richard, Payne, Mike

“…At the network access layer, optical fiber deployment continues at pace but copper cables containing twisted pairs (TWPs) will remain for some time and face an…”
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