A new MWA limit on the 21 cm power spectrum at redshifts ∼13-17
dc.contributor.author | Yoshiura, S. | |
dc.contributor.author | Pindor, B. | |
dc.contributor.author | Line, J.L.B. | |
dc.contributor.author | Barry, Nichole | |
dc.contributor.author | Trott, Cathryn | |
dc.contributor.author | Beardsley, A. | |
dc.contributor.author | Bowman, J. | |
dc.contributor.author | Byrne, R. | |
dc.contributor.author | Chokshi, A. | |
dc.contributor.author | Hazelton, B.J. | |
dc.contributor.author | Hasegawa, K. | |
dc.contributor.author | Howard, E. | |
dc.contributor.author | Greig, B. | |
dc.contributor.author | Jacobs, D. | |
dc.contributor.author | Jordan, Chris | |
dc.contributor.author | Joseph, R. | |
dc.contributor.author | Kolopanis, M. | |
dc.contributor.author | Lynch, Christene | |
dc.contributor.author | McKinley, Ben | |
dc.contributor.author | Mitchell, D.A. | |
dc.contributor.author | Morales, M.F. | |
dc.contributor.author | Murray, Steven | |
dc.contributor.author | Pober, J.C. | |
dc.contributor.author | Rahimi, M. | |
dc.contributor.author | Takahashi, K. | |
dc.contributor.author | Tingay, Steven | |
dc.contributor.author | Wayth, Randall | |
dc.contributor.author | Webster, R.L. | |
dc.contributor.author | Wilensky, M. | |
dc.contributor.author | Wyithe, J.S.B. | |
dc.contributor.author | Zhang, Z. | |
dc.contributor.author | Zheng, Q. | |
dc.date.accessioned | 2023-04-19T07:39:17Z | |
dc.date.available | 2023-04-19T07:39:17Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | Yoshiura, S. and Pindor, B. and Line, J.L.B. and Barry, N. and Trott, C.M. and Beardsley, A. and Bowman, J. et al. 2021. A new MWA limit on the 21 cm power spectrum at redshifts ∼13-17. Monthly Notices of the Royal Astronomical Society. 505 (4): pp. 4775-4790. | |
dc.identifier.uri | http://hdl.handle.net/20.500.11937/91573 | |
dc.identifier.doi | 10.1093/mnras/stab1560 | |
dc.description.abstract |
Observations in the lowest Murchison Widefield Array (MWA) band between 75 and 100 MHz have the potential to constrain the distribution of neutral hydrogen in the intergalactic medium at redshift ∼13-17. Using 15 h of MWA data, we analyse systematics in this band such as radio-frequency interference (RFI), ionospheric and wide field effects. By updating the position of point sources, we mitigate the direction-independent calibration error due to ionospheric offsets. Our calibration strategy is optimized for the lowest frequency bands by reducing the number of direction-dependent calibrators and taking into account radio sources within a wider field of view. We remove data polluted by systematics based on the RFI occupancy and ionospheric conditions, finally selecting 5.5 h of the cleanest data. Using these data, we obtain 2σ upper limits on the 21 cm power spectrum in the range of 0.1 h Mpc-1 ≲ k ≲ 1 h Mpc-1 and at z = 14.2, 15.2, and 16.5, with the lowest limit being 6.3 × 106 mK2 at k=0.14 h Mpc-1 and at z = 15.2 with a possibility of a few per cent of signal loss due to direction-independent calibration. | |
dc.language | English | |
dc.publisher | OXFORD UNIV PRESS | |
dc.relation.uri | http://dx.doi.org/10.1093/mnras/stab1560 | |
dc.relation.sponsoredby | http://purl.org/au-research/grants/arc/CE170100013 | |
dc.relation.sponsoredby | http://purl.org/au-research/grants/arc/DE140100316 | |
dc.relation.sponsoredby | http://purl.org/au-research/grants/arc/CE110001020 | |
dc.subject | Science & Technology | |
dc.subject | Physical Sciences | |
dc.subject | Astronomy & Astrophysics | |
dc.subject | methods: data analysis | |
dc.subject | dark ages, reionization, first stars | |
dc.subject | MURCHISON WIDEFIELD ARRAY | |
dc.subject | COSMIC DAWN | |
dc.subject | FUNDAMENTAL LIMITATIONS | |
dc.subject | NEUTRAL HYDROGEN | |
dc.subject | LIGHT-CONE | |
dc.subject | EPOCH | |
dc.subject | REIONIZATION | |
dc.subject | CALIBRATION | |
dc.subject | SIGNAL | |
dc.subject | LOFAR | |
dc.subject | astro-ph.CO | |
dc.subject | astro-ph.CO | |
dc.title | A new MWA limit on the 21 cm power spectrum at redshifts ∼13-17 | |
dc.type | Journal Article | |
dcterms.source.volume | 505 | |
dcterms.source.number | 4 | |
dcterms.source.startPage | 4775 | |
dcterms.source.endPage | 4790 | |
dcterms.source.issn | 0035-8711 | |
dcterms.source.title | Monthly Notices of the Royal Astronomical Society | |
dc.date.updated | 2023-04-19T07:39:15Z | |
curtin.note |
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. ©: 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. | |
curtin.department | School of Elec Eng, Comp and Math Sci (EECMS) | |
curtin.accessStatus | Open access | |
curtin.faculty | Faculty of Science and Engineering | |
curtin.contributor.orcid | Wayth, Randall [0000-0002-6995-4131] | |
curtin.contributor.orcid | Trott, Cathryn [0000-0001-6324-1766] | |
curtin.contributor.orcid | Jordan, Chris [0000-0002-1220-2940] | |
curtin.contributor.orcid | Tingay, Steven [0000-0002-8195-7562] | |
curtin.contributor.orcid | Barry, Nichole [0000-0003-2064-6979] | |
curtin.contributor.orcid | Lynch, Christene [0000-0002-0494-192X] | |
curtin.contributor.orcid | McKinley, Ben [0000-0002-9006-1450] | |
curtin.contributor.researcherid | Trott, Cathryn [B-5325-2013] | |
curtin.contributor.researcherid | Tingay, Steven [B-5271-2013] | |
curtin.contributor.researcherid | Murray, Steven [K-8771-2017] | |
dcterms.source.eissn | 1365-2966 | |
curtin.contributor.scopusauthorid | Wayth, Randall [8533270000] | |
curtin.contributor.scopusauthorid | Trott, Cathryn [24438609500] | |
curtin.contributor.scopusauthorid | Jordan, Chris [37118932200] | |
curtin.contributor.scopusauthorid | Tingay, Steven [7004903117] | |
curtin.contributor.scopusauthorid | Murray, Steven [55822699100] | |
curtin.contributor.scopusauthorid | Lynch, Christene [56927637600] | |
curtin.contributor.scopusauthorid | McKinley, Ben [55532876300] | |
curtin.repositoryagreement | V3 |