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Verifying the Australian MWA EoR pipeline I: 21-cm sky model and correlated measurement density

Autor: Line, J. L. B., Trott, C. M., Cook, J. H., Greig, B., Barry, N., Jordan, C. H.

We present the first of two papers dedicated to verifying the Australian Epoch of Reionisation pipeline (AusEoRPipe) through simulation. The AusEoRPipe aims to disentangle 21-cm radiation emitted by gas surrounding the very first stars from contamina

Externí odkaz: http://arxiv.org/abs/2404.05140

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The Impact of ionization Morphology and X-ray Heating on the Cosmological 21cm Skew Spectrum

Autor: Cook, J. H., Balu, S., Greig, B., Trott, C. M., Line, J. L. B., Qin, Y., Wyithe, J. S. B.

The cosmological 21cm signal offers a potential probe of the early Universe and the first ionizing sources. Current experiments probe the spatially-dependent variance (Gaussianity) of the signal through the power spectrum (PS). The signal however is

Externí odkaz: http://arxiv.org/abs/2402.17254

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Investigating the Contribution of Extended Radio Sources to the Epoch of Reionisation Power Spectrum

Autor: Cook, J H., Trott, C. M., Line, J. L. B.

We investigate the contribution of extended radio sources such as Centaurus A, and Galactic supernova remnants (SNRs) to our ability to detect the statistical $21\,\rm{cm}$ signal from the Epoch of Reionisation (EoR) with the Murchison Widefield Arra

Externí odkaz: http://arxiv.org/abs/2205.04644

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Imaging at 300 MHz With the MWA

Autor: Cook, J. H., Seymour, N., Sokolowski, M.

At relatively high frequencies, highly sensitive grating sidelobes occur in the primary beam patterns of low frequency aperture arrays (LFAA) such as the Murchison Widefield Array (MWA). This occurs when the observing wavelength becomes comparable to

Externí odkaz: http://arxiv.org/abs/2104.00883

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Deep multi-redshift limits on Epoch of Reionisation 21cm Power Spectra from Four Seasons of Murchison Widefield Array Observations

We compute the spherically-averaged power spectrum from four seasons of data obtained for the Epoch of Reionisation (EoR) project observed with the Murchison Widefield Array (MWA). We measure the EoR power spectrum over $k= 0.07-3.0~h$Mpc$^{-1}$ at r

Externí odkaz: http://arxiv.org/abs/2002.02575

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