New EoR power spectrum limits from MWA Phase II using the delay spectrum method and novel systematic rejection

被引：18

作者：

Kolopanis, Matthew ^{[1
]}

Pober, Jonathan C. ^{[2
]}

Jacobs, Daniel C. ^{[1
]}

McGraw, Samantha ^{[2
]}

机构：

[1] Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA

[2] Brown Univ, Dept Phys, Providence, RI 02912 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2023年 / 521卷 / 04期

基金：

澳大利亚研究理事会; 美国国家科学基金会;

关键词：

methods: data analysis; techniques: interferometric; dark ages; reionization; first stars; LOW-FREQUENCY; RADIO-EMISSION; HYDROGEN EPOCH; REIONIZATION; ARRAY; CALIBRATION; MHZ; I;

D O I：

10.1093/mnras/stad845

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present an analysis of Epoch of Reionization (EoR) data from Phase II of the Murchison Widefield Array using the SIMPLEDS delay spectrum pipeline. Prior work analysed the same observations using the FHD/eppsilon imaging pipeline, and so the present analysis represents the first time that both principal types of 21 cm cosmology power spectrum estimation approaches have been applied to the same data set. Our limits on the 21 cm power spectrum amplitude span a range in k space of |k| < 1 h(100) Mpc(-1) with a lowest measurement of Delta(2)(k) <= 4.58 x10(3) mK(2) at k = 0.190 h(100) Mpc(-1) and z = 7.14. In order to achieve these limits, we need to mitigate a previously unidentified common mode systematic in the data set. If not accounted for, this systematic introduces an overall negative bias that can make foreground contaminated measurements appear as stringent, noise-limited constraints on the 21 cm signal amplitude. The identification of this systematic highlights the risk in modelling systematics as positive-definite contributions to the power spectrum and in 'conservatively' interpreting all measurements as upper limits.

引用

页码：5120 / 5138

页数：19

共 52 条

[1] First Results from HERA Phase I: Upper Limits on the Epoch of Reionization 21 cm Power Spectrum [J].

Abdurashidova, Zara ;

Aguirre, James E. ;

Alexander, Paul ;

Ali, Zaki S. ;

Balfour, Yanga ;

Beardsley, Adam P. ;

Bernardi, Gianni ;

Billings, Tashalee S. ;

Bowman, Judd D. ;

Bradley, Richard F. ;

Bull, Philip ;

Burba, Jacob ;

Carey, Steve ;

Carilli, Chris L. ;

Cheng, Carina ;

DeBoer, David R. ;

Dexter, Matt ;

Acedo, Eloy de Lera ;

Dibblee-Barkman, Taylor ;

Dillon, Joshua S. ;

Ely, John ;

Ewall-Wice, Aaron ;

Fagnoni, Nicolas ;

Fritz, Randall ;

Furlanetto, Steven R. ;

Gale-Sides, Kingsley ;

Glendenning, Brian ;

Gorthi, Deepthi ;

Greig, Bradley ;

Grobbelaar, Jasper ;

Halday, Ziyaad ;

Hazelton, Bryna J. ;

Hewitt, Jacqueline N. ;

Hickish, Jack ;

Jacobs, Daniel C. ;

Julius, Austin ;

Kern, Nicholas S. ;

Kerrigan, Joshua ;

Kittiwisit, Piyanat ;

Kohn, Saul A. ;

Kolopanis, Matthew ;

Lanman, Adam ;

La Plante, Paul ;

Lekalake, Telalo ;

Lewis, David ;

Liu, Adrian ;

MacMahon, David ;

Malan, Lourence ;

Malgas, Cresshim ;

Maree, Matthys .

ASTROPHYSICAL JOURNAL, 2022, 925 (02)

[2] Planck 2015 results XIII. Cosmological parameters [J].

Ade, P. A. R. ;

Aghanim, N. ;

Arnaud, M. ;

Ashdown, M. ;

Aumont, J. ;

Baccigalupi, C. ;

Banday, A. J. ;

Barreiro, R. B. ;

Bartlett, J. G. ;

Bartolo, N. ;

Battaner, E. ;

Battye, R. ;

Benabed, K. ;

Benoit, A. ;

Benoit-Levy, A. ;

Bernard, J. -P. ;

Bersanelli, M. ;

Bielewicz, P. ;

Bock, J. J. ;

Bonaldi, A. ;

Bonavera, L. ;

Bond, J. R. ;

Borrill, J. ;

Bouchet, F. R. ;

Boulanger, F. ;

Bucher, M. ;

Burigana, C. ;

Butler, R. C. ;

Calabrese, E. ;

Cardoso, J. -F. ;

Catalano, A. ;

Challinor, A. ;

Chamballu, A. ;

Chary, R. -R. ;

Chiang, H. C. ;

Chluba, J. ;

Christensen, P. R. ;

Church, S. ;

Clements, D. L. ;

Colombi, S. ;

Colombo, L. P. L. ;

Combet, C. ;

Coulais, A. ;

Crill, B. P. ;

Curto, A. ;

Cuttaia, F. ;

Danese, L. ;

Davies, R. D. ;

Davis, R. J. ;

de Bernardis, P. .

ASTRONOMY & ASTROPHYSICS, 2016, 594

[3] Validation of the HERA Phase I Epoch of Reionization 21 cm Power Spectrum Software Pipeline [J].

Aguirre, James E. ;

Murray, Steven G. ;

Pascua, Robert ;

Martinot, Zachary E. ;

Burba, Jacob ;

Dillon, Joshua S. ;

Jacobs, Daniel C. ;

Kern, Nicholas S. ;

Kittiwisit, Piyanat ;

Kolopanis, Matthew ;

Lanman, Adam ;

Liu, Adrian ;

Whitler, Lily ;

Abdurashidova, Zara ;

Alexander, Paul ;

Ali, Zaki S. ;

Balfour, Yanga ;

Beardsley, Adam P. ;

Bernardi, Gianni ;

Billings, Tashalee S. ;

Bowman, Judd D. ;

Bradley, Richard F. ;

Bull, Philip ;

Carey, Steve ;

Carilli, Chris L. ;

Cheng, Carina ;

DeBoer, David R. ;

Dexter, Matt ;

Acedo, Eloy de Lera ;

Ely, John ;

Ewall-Wice, Aaron ;

Fagnoni, Nicolas ;

Fritz, Randall ;

Furlanetto, Steven R. ;

Gale-Sides, Kingsley ;

Glendenning, Brian ;

Gorthi, Deepthi ;

Greig, Bradley ;

Grobbelaar, Jasper ;

Halday, Ziyaad ;

Hazelton, Bryna J. ;

Hewitt, Jacqueline N. ;

Hickish, Jack ;

Julius, Austin ;

Kerrigan, Joshua ;

Kohn, Saul A. ;

La Plante, Paul ;

Lekalake, Telalo ;

Lewis, David ;

MacMahon, David .

ASTROPHYSICAL JOURNAL, 2022, 924 (02)

[4]

[Anonymous], 2019, ASTROPHYS J, DOI DOI 10.3847/1538-4357/AB3E3A

[5] The FHD/εppsilon Epoch of Reionisation power spectrum pipeline [J].

Barry, N. ;

Beardsley, A. P. ;

Byrne, R. ;

Hazelton, B. ;

Morales, M. F. ;

Pober, J. C. ;

Sullivan, I. .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA, 2019, 36

[6] An absorption profile centred at 78 megahertz in the sky-averaged spectrum [J].

Bowman, Judd D. ;

Rogers, Alan E. E. ;

Monsalve, Raul A. ;

Mozdzen, Thomas J. ;

Mahesh, Nivedita .

NATURE, 2018, 555 (7694) :67-+

[7]

Bradley L., 2016, Astrophysics Source Code Library

[8]

Byrne R., 2021, 09 EOR IM, V#09

[9]

Byrne R., 2021, THESIS U WASHINGTON

[10] A map of diffuse radio emission at 182 MHz to enhance epoch of reionization observations in the Southern hemisphere [J].

Byrne, Ruby ;

Morales, Miguel F. ;

Hazelton, Bryna ;

Sullivan, Ian ;

Barry, Nichole ;

Lynch, Christene ;

Line, Jack L. B. ;

Jacobs, Daniel C. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2022, 510 (02) :2011-2024

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