Direct Optimal Mapping for 21cm Cosmology: A Demonstration with the Hydrogen Epoch of Reionization Array

Autor: Xu, Z, Hewitt, JN, Chen, KF, Kim, H, Dillon, JS, Kern, NS, Morales, MF, Hazelton, BJ, Byrne, R, Fagnoni, N, Acedo, EDL, Abdurashidova, Z, Adams, T, Aguirre, JE, Alexander, P, Ali, ZS, Baartman, R, Balfour, Y, Beardsley, AP, Bernardi, G, Billings, TS, Bowman, JD, Bradley, RF, Bull, P, Burba, J, Carey, S, Carilli, CL, Cheng, C, DeBoer, DR, Dexter, M, Eksteen, N, Ely, J, Ewall-Wice, A, Fritz, R, Furlanetto, Gale-Sides, K, Glendenning, B, Gorthi, D, Greig, B, Grobbelaar, J, Halday, Z, Hickish, J, Jacobs, DC, Julius, A, Kariseb, M, Kerrigan, J, Kittiwisit, P, Kohn, SA, Kolopanis, M, Lanman, A, Plante, PL, Liu, A, Loots, A, Ma, YZ, Edward MacMahon, DH, Malan, L, Malgas, C, Malgas, K, Marero, B, Martinot, ZE, Mesinger, A, Molewa, M, Mosiane, T, Murray, SG, Neben, AR, Nikolic, B, Nuwegeld, H, Parsons, AR, Patra, N, Pieterse, S, Pober, JC, Razavi-Ghods, N, Robnett, J, Rosie, K, Sims, P, Smith, C, Swarts, H, Thyagarajan, N, Wyngaarden, PVV, Williams, PKG, Zheng, H

Motivated by the desire for wide-field images with well-defined statistical properties for 21cm cosmology, we implement an optimal mapping pipeline that computes a maximum likelihood estimator for the sky using the interferometric measurement equatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd583de3cc16623d049411df54ffff96
http://arxiv.org/abs/2204.06021

Understanding the HERA Phase i receiver system with simulations and its impact on the detectability of the EoR delay power spectrum

Autor: Fagnoni, N, De Lera Acedo, E, Deboer, DR, Abdurashidova, Z, Aguirre, JE, Alexander, P, Ali, ZS, Balfour, Y, Beardsley, AP, Bernardi, G, Billings, TS, Bowman, JD, Bradley, RF, Bull, P, Burba, J, Carilli, CL, Cheng, C, Dexter, M, Dillon, JS, Ewall-Wice, A, Fritz, R, Furlanetto, SR, Gale-Sides, K, Glendenning, B, Gorthi, D, Greig, B, Grobbelaar, J, Halday, Z, Hazelton, BJ, Hewitt, JN, Hickish, J, Jacobs, DC, Josaitis, A, Julius, A, Kern, NS, Kerrigan, J, Kim, H, Kittiwisit, P, Kohn, SA, Kolopanis, M, Lanman, A, Plante, PL, Lekalake, T, Liu, A, Macmahon, D, Malan, L, Malgas, C, Maree, M, Martinot, ZE, Matsetela, E, Mena Parra, J, Mesinger, A, Molewa, M, Morales, MF, Mosiane, T, Neben, AR, Nikolic, B, Parsons, AR, Patra, N, Pieterse, S, Pober, JC, Razavi-Ghods, N, Robnett, J, Rosie, K, Sims, P, Smith, C, Syce, A, Thyagarajan, N, Williams, PKG, Zheng, H

Publikováno v: Monthly Notices of the Royal Astronomical Society, vol 500, iss 1

The detection of the Epoch of Reionization (EoR) delay power spectrum using a "foreground avoidance method" highly depends on the instrument chromaticity. The systematic effects induced by the radio-telescope spread the foreground signal in the delay

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0297ce0909920b1afa8a5835ca900cb9

H I21-cm Cosmology and the Bispectrum: Closure Diagnostics in Massively Redundant Interferometric Arrays

Autor: Carilli, CL, Nikolic, B, Thyagarajan, N, Gale-Sides, K, Abdurashidova, Z, Aguirre, JE, Alexander, P, Ali, ZS, Balfour, Y, Beardsley, AP, Bernardi, G, Bowman, JD, Bradley, RF, Burba, J, Cheng, C, DeBoer, DR, Dexter, M, Acedo, EDL, Dillon, JS, Ewall-Wice, A, Fadana, G, Fagnoni, N, Fritz, R, Furlanetto, SR, Ghosh, A, Glendenning, B, Greig, B, Grobbelaar, J, Halday, Z, Hazelton, BJ, Hewitt, JN, Hickish, J, Jacobs, DC, Julius, A, Kariseb, M, Kohn, SA, Kolopanis, M, Lekalake, T, Liu, A, Loots, A, MacMahon, D, Malan, L, Malgas, C, Maree, M, Martinot, Z, Matsetela, E, Mesinger, A, Molewa, M, Morales, MF, Neben, AR, Parsons, AR, Patra, N, Pieterse, S, Plante, PL, Pober, JC, Razavi-Ghods, N, Ringuette, J, Robnett, J, Rosie, K, Sell, R, Sims, P, Smith, C, Syce, A, Williams, PKG, Zheng, H

Publikováno v: Carilli, CL; Nikolic, B; Thyagarajan, N; Gale-Sides, K; Abdurashidova, Z; Aguirre, JE; et al.(2018). HI 21cm Cosmology and the Bi-spectrum: Closure Diagnostics in Massively Redundant Interferometric Arrays. UCLA: Retrieved from: http://www.escholarship.org/uc/item/7bb0f1fp

New massively redundant low frequency arrays allow for a novel investigation of closure relations in interferometry. We employ commissioning data from the Hydrogen Epoch of Reionization Array to investigate closure quantities in this densely packed g

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9fab1f68600446781b0b3d73d368caaa
https://doi.org/10.1029/2018rs006537

Mapmaking for precision 21 cm cosmology MAPMAKING for PRECISION 21 CM COSMOLOGY JOSHUA S. DILLON et al

Autor: Dillon, JS, Tegmark, M, Liu, A, Ewall-Wice, A, Hewitt, JN, Morales, MF, Neben, AR, Parsons, AR, Zheng, H

Publikováno v: Physical Review D-Particles, Fields, Gravitation and Cosmology, vol 91, iss 2
Dillon, JS; Tegmark, M; Liu, A; Ewall-Wice, A; Hewitt, JN; Morales, MF; et al.(2015). Mapmaking for precision 21 cm cosmology MAPMAKING for PRECISION 21 CM COSMOLOGY JOSHUA S. DILLON et al.. Physical Review D-Particles, Fields, Gravitation and Cosmology, 91(2). doi: 10.1103/PhysRevD.91.023002. UC Berkeley: Retrieved from: http://www.escholarship.org/uc/item/5184g6hm

© 2015 American Physical Society. In order to study the "Cosmic Dawn" and the Epoch of Reionization with 21 cm tomography, we need to statistically separate the cosmological signal from foregrounds known to be orders of magnitude brighter. Over the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::624b4cbc0db269bc0ae9ac1c2f1bd07f
https://escholarship.org/uc/item/5184g6hm

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