FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3026697817> ?p ?o ?g. }

• W3026697817 abstract "Characterizing the epoch of reionization (EoR) at z≳6 via the redshifted 21 cm line of neutral Hydrogen (H i) is critical to modern astrophysics and cosmology, and thus a key science goal of many current and planned low-frequency radio telescopes. The primary challenge to detecting this signal is the overwhelmingly bright foreground emission at these frequencies, placing stringent requirements on the knowledge of the instruments and inaccuracies in analyses. Results from these experiments have largely been limited not by thermal sensitivity but by systematics, particularly caused by the inability to calibrate the instrument to high accuracy. The interferometric bispectrum phase is immune to antenna-based calibration and errors therein, and presents an independent alternative to detect the EoR H i fluctuations while largely avoiding calibration systematics. Here, we provide a demonstration of this technique on a subset of data from the Hydrogen Epoch of Reionization Array (HERA) to place approximate constraints on the brightness temperature of the intergalactic medium (IGM). From this limited data, at z=7.7 we infer “1σ” upper limits on the IGM brightness temperature to be ≤ 316 “pseudo” mK at κ∥=0.33 “pseudo” h Mpc−1 (data-limited) and ≤ 1000 “pseudo” mK at κ∥=0.875 “pseudo” h Mpc−1 (noise-limited). The “pseudo” units denote only an approximate and not an exact correspondence to the actual distance scales and brightness temperatures. By propagating models in parallel to the data analysis, we confirm that the dynamic range required to separate the cosmic H i signal from the foregrounds is similar to that in standard approaches, and the power spectrum of the bispectrum phase is still data-limited (at ≳106 dynamic range) indicating scope for further improvement in sensitivity as the array build-out continues.1 MoreReceived 19 December 2019Accepted 17 May 2020DOI:https://doi.org/10.1103/PhysRevD.102.022002© 2020 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasCosmologyEvolution of the UniverseFormation & evolution of stars & galaxiesLarge scale structure of the UniverseRadio, microwave, & sub-mm astronomyTelescopesGravitation, Cosmology & Astrophysics" @default.
• W3026697817 created "2020-05-29" @default.
• W3026697817 creator A5000480295 @default.
• W3026697817 creator A5000769450 @default.
• W3026697817 creator A5001258222 @default.
• W3026697817 creator A5003216052 @default.
• W3026697817 creator A5004530546 @default.
• W3026697817 creator A5005708970 @default.
• W3026697817 creator A5006929845 @default.
• W3026697817 creator A5007638695 @default.
• W3026697817 creator A5007821406 @default.
• W3026697817 creator A5009133566 @default.
• W3026697817 creator A5010767955 @default.
• W3026697817 creator A5013198705 @default.
• W3026697817 creator A5013493171 @default.
• W3026697817 creator A5013594036 @default.
• W3026697817 creator A5015248597 @default.
• W3026697817 creator A5016624380 @default.
• W3026697817 creator A5017361196 @default.
• W3026697817 creator A5017972875 @default.
• W3026697817 creator A5024608470 @default.
• W3026697817 creator A5026568310 @default.
• W3026697817 creator A5027325194 @default.
• W3026697817 creator A5028442017 @default.
• W3026697817 creator A5029508912 @default.
• W3026697817 creator A5029889883 @default.
• W3026697817 creator A5030329155 @default.
• W3026697817 creator A5031245726 @default.
• W3026697817 creator A5032048831 @default.
• W3026697817 creator A5032516498 @default.
• W3026697817 creator A5033364988 @default.
• W3026697817 creator A5036867140 @default.
• W3026697817 creator A5036958287 @default.
• W3026697817 creator A5038107587 @default.
• W3026697817 creator A5038705073 @default.
• W3026697817 creator A5040510580 @default.
• W3026697817 creator A5042329642 @default.
• W3026697817 creator A5043259563 @default.
• W3026697817 creator A5044715664 @default.
• W3026697817 creator A5046206184 @default.
• W3026697817 creator A5046214946 @default.
• W3026697817 creator A5046932423 @default.
• W3026697817 creator A5047206431 @default.
• W3026697817 creator A5050640505 @default.
• W3026697817 creator A5051530251 @default.
• W3026697817 creator A5051640991 @default.
• W3026697817 creator A5053723136 @default.
• W3026697817 creator A5054845209 @default.
• W3026697817 creator A5055838982 @default.
• W3026697817 creator A5057388882 @default.
• W3026697817 creator A5058008520 @default.
• W3026697817 creator A5058907853 @default.
• W3026697817 creator A5062416638 @default.
• W3026697817 creator A5066625349 @default.
• W3026697817 creator A5067642637 @default.
• W3026697817 creator A5070464988 @default.
• W3026697817 creator A5070562377 @default.
• W3026697817 creator A5070588335 @default.
• W3026697817 creator A5071294469 @default.
• W3026697817 creator A5072070138 @default.
• W3026697817 creator A5072113938 @default.
• W3026697817 creator A5072311252 @default.
• W3026697817 creator A5072981488 @default.
• W3026697817 creator A5073288239 @default.
• W3026697817 creator A5075514006 @default.
• W3026697817 creator A5076638185 @default.
• W3026697817 creator A5080933124 @default.
• W3026697817 creator A5080968008 @default.
• W3026697817 creator A5084082293 @default.
• W3026697817 creator A5088100194 @default.
• W3026697817 creator A5088532272 @default.
• W3026697817 creator A5090498186 @default.
• W3026697817 creator A5090805580 @default.
• W3026697817 creator A5091248771 @default.
• W3026697817 date "2020-07-01" @default.
• W3026697817 modified "2023-10-16" @default.
• W3026697817 title "Detection of cosmic structures using the bispectrum phase. II. First results from application to cosmic reionization using the Hydrogen Epoch of Reionization Array" @default.
• W3026697817 cites W1525400123 @default.
• W3026697817 cites W1591764244 @default.
• W3026697817 cites W1680526100 @default.
• W3026697817 cites W1899149329 @default.
• W3026697817 cites W1921567268 @default.
• W3026697817 cites W1975679485 @default.
• W3026697817 cites W1997702548 @default.
• W3026697817 cites W2000219050 @default.
• W3026697817 cites W2013447246 @default.
• W3026697817 cites W2014312666 @default.
• W3026697817 cites W2016600321 @default.
• W3026697817 cites W2025670910 @default.
• W3026697817 cites W2046689939 @default.
• W3026697817 cites W2061451600 @default.
• W3026697817 cites W2061524193 @default.
• W3026697817 cites W2069592831 @default.
• W3026697817 cites W2073938066 @default.
• W3026697817 cites W2078677259 @default.
• W3026697817 cites W2081894932 @default.
• W3026697817 cites W2084135442 @default.
• W3026697817 cites W2087860870 @default.
• W3026697817 cites W2088216763 @default.
• W3026697817 cites W2108068182 @default.

• next