Direct Optimal Mapping Image Power Spectrum and its Window Functions
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Published:2024-08-01
Issue:1
Volume:971
Page:16
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ISSN:0004-637X
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Container-title:The Astrophysical Journal
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language:
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Short-container-title:ApJ
Author:
Xu ZhileiORCID, Kim HonggeunORCID, Hewitt Jacqueline N.ORCID, Chen Kai-FengORCID, Kern Nicholas S.ORCID, Rath Eleanor, Byrne RubyORCID, Gorce Adélie, Pascua RobertORCID, Martinot Zachary E., Dillon Joshua S.ORCID, Hazelton Bryna J.ORCID, Liu AdrianORCID, Morales Miguel F.ORCID, Abdurashidova Zara, Adams Tyrone, Aguirre James E.ORCID, Alexander Paul, Ali Zaki S., Baartman Rushelle, Balfour Yanga, Beardsley Adam P.ORCID, Bernardi GianniORCID, Billings Tashalee S., Bowman Judd D.ORCID, Bradley Richard F.ORCID, Bull PhilipORCID, Burba JacobORCID, Carey Steven, Carilli Chris L.ORCID, Cheng Carina, DeBoer David R.ORCID, de Lera Acedo Eloy, Dexter Matt, Eksteen Nico, Ely John, Ewall-Wice AaronORCID, Fagnoni Nicolas, Fritz Randall, Furlanetto Steven R.ORCID, Gale-Sides Kingsley, Glendenning Brian, Gorthi DeepthiORCID, Greig BradleyORCID, Grobbelaar Jasper, Halday Ziyaad, Hickish Jack, Jacobs Daniel C.ORCID, Julius Austin, Kariseb MacCalvin, Kerrigan JoshuaORCID, Kittiwisit PiyanatORCID, Kohn Saul A.ORCID, Kolopanis MatthewORCID, Lanman AdamORCID, La Plante PaulORCID, Loots Anita, MacMahon David Harold Edward, Malan Lourence, Malgas Cresshim, Malgas Keith, Marero Bradley, Mesinger AndreiORCID, Molewa Mathakane, Mosiane Tshegofalang, Murray Steven G.ORCID, Neben Abraham R.ORCID, Nikolic Bojan, Nuwegeld Hans, Parsons Aaron R.ORCID, Patra NipanjanaORCID, Pieterse Samantha, Razavi-Ghods Nima, Robnett James, Rosie Kathryn, Sims PeterORCID, Smith Craig, Swarts Hilton, Tan JianrongORCID, Thyagarajan NithyanandanORCID, van Wyngaarden Pieter, Williams Peter K. G.ORCID, Zheng Haoxuan,
Abstract
Abstract
The key to detecting neutral hydrogen during the epoch of reionization (EoR) is to separate the cosmological signal from the dominating foreground radiation. We developed direct optimal mapping (DOM) to map interferometric visibilities; it contains only linear operations, with full knowledge of point spread functions from visibilities to images. Here, we demonstrate a fast Fourier transform-based image power spectrum and its window functions computed from the DOM images. We use noiseless simulation, based on the Hydrogen Epoch of Reionization Array Phase I configuration, to study the image power spectrum properties. The window functions show <10−11 of the integrated power leaks from the foreground-dominated region into the EoR window; the 2D and 1D power spectra also verify the separation between the foregrounds and the EoR.
Funder
National Science Foundation Gordon and Betty Moore Foundation
Publisher
American Astronomical Society
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