Journal article

Constraining the 21cm brightness temperature of the IGM at z=6.6 around LAEs with the murchison widefield array

CM Trott, CH Jordan, JLB Line, CR Lynch, S Yoshiura, B McKinley, P Dayal, B Pindor, A Hutter, K Takahashi, RB Wayth, N Barry, A Beardsley, J Bowman, R Byrne, A Chokshi, B Greig, K Hasegawa, BJ Hazelton, E Howard Show all



The locations of Ly α-emitting galaxies (LAEs) at the end of the Epoch of Reionization (EoR) are expected to correlate with regions of ionized hydrogen, traced by the redshifted 21 cm hyperfine line. Mapping the neutral hydrogen around regions with detected and localized LAEs offers an avenue to constrain the brightness temperature of the Universe within the EoR by providing an expectation for the spatial distribution of the gas, thereby providing prior information unavailable to power spectrum measurements. We use a test set of 12 h of observations from the Murchison Widefield Array (MWA) in extended array configuration, to constrain the neutral hydrogen signature of 58 LAEs, detected with ..

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Awarded by Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)

Awarded by ARC Future Fellowship


Awarded by European Research Council

Awarded by NWO

Awarded by Australian Research Council LIEF grant

Funding Acknowledgements

We would like to thank Marcin Sokolowski and Andrew Williams for help with scheduling the observations. This research was partly supported by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project number CE170100013. CMT is supported by an ARC Future Fellowship under grant FT180100321. The International Centre for Radio Astronomy Research (ICRAR) is a Joint Venture of Curtin University and The University of Western Australia, funded by the Western Australian State government. KT is partially supported by JSPS KAKENHI grants JP15H05896, JP16H05999, and JP17H01110, and Bilateral Joint Research Projects of JSPS. PD and AH acknowledge support from the European Research Council's starting grant ERC StG-717001 (DELPHI). PD acknowledges support from the NWO grant 016.VIDI.189.162 (ODIN) and the European Commission's and University of Groningen's COFUND Rosalind Franklin University program. The MWA Phase II upgrade project was supported by Australian Research Council LIEF grant LE160100031 and the Dunlap Institute for Astronomy and Astrophysics at the University of Toronto. This scientific work uses the Murchison Radio-astronomy Observatory, operated by CSIRO. We acknowledge theWajarriYamatji people as the traditional owners of the Observatory site. Support for the operation of the MWA is provided by the Australian Government (NCRIS), under a contract to Curtin University administered by Astronomy Australia Limited. We acknowledge the Pawsey Supercomputing Centre, which is supported by the Western Australian and Australian Governments.