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Testing the standard model of cosmology with the SKA: the cosmic radio dipole

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Standard

Testing the standard model of cosmology with the SKA: the cosmic radio dipole. / Bengaly, Carlos A. P.; Siewert, Thilo M.; Schwarz, Dominik J.; Maartens, Roy.

In: Monthly Notices of the Royal Astronomical Society, Vol. 486, No. 1, 01.06.2019, p. 1350-1357.

Research output: Contribution to journalArticlepeer-review

Harvard

Bengaly, CAP, Siewert, TM, Schwarz, DJ & Maartens, R 2019, 'Testing the standard model of cosmology with the SKA: the cosmic radio dipole', Monthly Notices of the Royal Astronomical Society, vol. 486, no. 1, pp. 1350-1357. https://doi.org/10.1093/mnras/stz832

APA

Bengaly, C. A. P., Siewert, T. M., Schwarz, D. J., & Maartens, R. (2019). Testing the standard model of cosmology with the SKA: the cosmic radio dipole. Monthly Notices of the Royal Astronomical Society, 486(1), 1350-1357. https://doi.org/10.1093/mnras/stz832

Vancouver

Bengaly CAP, Siewert TM, Schwarz DJ, Maartens R. Testing the standard model of cosmology with the SKA: the cosmic radio dipole. Monthly Notices of the Royal Astronomical Society. 2019 Jun 1;486(1):1350-1357. https://doi.org/10.1093/mnras/stz832

Author

Bengaly, Carlos A. P. ; Siewert, Thilo M. ; Schwarz, Dominik J. ; Maartens, Roy. / Testing the standard model of cosmology with the SKA: the cosmic radio dipole. In: Monthly Notices of the Royal Astronomical Society. 2019 ; Vol. 486, No. 1. pp. 1350-1357.

Bibtex

@article{d6de2859e77143799857f26be609f9a6,
title = "Testing the standard model of cosmology with the SKA: the cosmic radio dipole",
abstract = "The dipole anisotropy seen in the {cosmic microwave background radiation} is interpreted as due to our peculiar motion. The Cosmological Principle implies that this cosmic dipole signal should also be present, with the same direction, in the large-scale distribution of matter. Measurement of the cosmic matter dipole constitutes a key test of the standard cosmological model. Current measurements of this dipole are barely above the expected noise and unable to provide a robust test. Upcoming radio continuum surveys with the SKA should be able to detect the dipole at high signal to noise. We simulate number count maps for SKA survey specifications in Phases 1 and 2, including all relevant effects. Nonlinear effects from local large-scale structure contaminate the {cosmic (kinematic)} dipole signal, and we find that removal of radio sources at low redshift ($z\lesssim 0.5$) leads to significantly improved constraints. We forecast that the SKA could determine the kinematic dipole direction in Galactic coordinates with an error of $(\Delta l,\Delta b)\sim(9^\circ,5^\circ)$ to $(8^\circ, 4^\circ)$, depending on the sensitivity. The predicted errors on the relative speed are $\sim 10\%$. These measurements would significantly reduce the present uncertainty on the direction of the radio dipole, and thus enable the first critical test of consistency between the matter and CMB dipoles. ",
keywords = "astro-ph.CO, astro-ph.GA, gr-qc, RCUK, STFC, ST/N000668/1",
author = "Bengaly, {Carlos A. P.} and Siewert, {Thilo M.} and Schwarz, {Dominik J.} and Roy Maartens",
note = "No embargo This is a pre-copyedited, author-produced version of an article accepted for publication in [insert journal title] following peer review. The version of record [insert complete citation information here] is available online at: xxxxxxx [insert URL and DOI of the article on the OUP website].",
year = "2019",
month = jun,
day = "1",
doi = "10.1093/mnras/stz832",
language = "English",
volume = "486",
pages = "1350--1357",
journal = "MNRAS",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "1",

}

RIS

TY - JOUR

T1 - Testing the standard model of cosmology with the SKA: the cosmic radio dipole

AU - Bengaly, Carlos A. P.

AU - Siewert, Thilo M.

AU - Schwarz, Dominik J.

AU - Maartens, Roy

N1 - No embargo This is a pre-copyedited, author-produced version of an article accepted for publication in [insert journal title] following peer review. The version of record [insert complete citation information here] is available online at: xxxxxxx [insert URL and DOI of the article on the OUP website].

PY - 2019/6/1

Y1 - 2019/6/1

N2 - The dipole anisotropy seen in the {cosmic microwave background radiation} is interpreted as due to our peculiar motion. The Cosmological Principle implies that this cosmic dipole signal should also be present, with the same direction, in the large-scale distribution of matter. Measurement of the cosmic matter dipole constitutes a key test of the standard cosmological model. Current measurements of this dipole are barely above the expected noise and unable to provide a robust test. Upcoming radio continuum surveys with the SKA should be able to detect the dipole at high signal to noise. We simulate number count maps for SKA survey specifications in Phases 1 and 2, including all relevant effects. Nonlinear effects from local large-scale structure contaminate the {cosmic (kinematic)} dipole signal, and we find that removal of radio sources at low redshift ($z\lesssim 0.5$) leads to significantly improved constraints. We forecast that the SKA could determine the kinematic dipole direction in Galactic coordinates with an error of $(\Delta l,\Delta b)\sim(9^\circ,5^\circ)$ to $(8^\circ, 4^\circ)$, depending on the sensitivity. The predicted errors on the relative speed are $\sim 10\%$. These measurements would significantly reduce the present uncertainty on the direction of the radio dipole, and thus enable the first critical test of consistency between the matter and CMB dipoles.

AB - The dipole anisotropy seen in the {cosmic microwave background radiation} is interpreted as due to our peculiar motion. The Cosmological Principle implies that this cosmic dipole signal should also be present, with the same direction, in the large-scale distribution of matter. Measurement of the cosmic matter dipole constitutes a key test of the standard cosmological model. Current measurements of this dipole are barely above the expected noise and unable to provide a robust test. Upcoming radio continuum surveys with the SKA should be able to detect the dipole at high signal to noise. We simulate number count maps for SKA survey specifications in Phases 1 and 2, including all relevant effects. Nonlinear effects from local large-scale structure contaminate the {cosmic (kinematic)} dipole signal, and we find that removal of radio sources at low redshift ($z\lesssim 0.5$) leads to significantly improved constraints. We forecast that the SKA could determine the kinematic dipole direction in Galactic coordinates with an error of $(\Delta l,\Delta b)\sim(9^\circ,5^\circ)$ to $(8^\circ, 4^\circ)$, depending on the sensitivity. The predicted errors on the relative speed are $\sim 10\%$. These measurements would significantly reduce the present uncertainty on the direction of the radio dipole, and thus enable the first critical test of consistency between the matter and CMB dipoles.

KW - astro-ph.CO

KW - astro-ph.GA

KW - gr-qc

KW - RCUK

KW - STFC

KW - ST/N000668/1

U2 - 10.1093/mnras/stz832

DO - 10.1093/mnras/stz832

M3 - Article

VL - 486

SP - 1350

EP - 1357

JO - MNRAS

JF - MNRAS

SN - 0035-8711

IS - 1

ER -

ID: 13482135